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47 Best R134a Stop Leak in 2021 [Expert Picks]

Are you looking for a decent r134a stop leak? To help you find the best option for your needs, I researched various products for 66 hours and after doing an in-depth analysis, here’s my list of best options of 2021.

It doesn’t matter what your usage needs are, I’ve made sure that my list includes the best-rated options that are highly suitable for diversified usage needs.

Although my focus has been on listing the right r134a stop leak that are suitable for diversified needs, I’ve also added a short description, purchase links which should help you make an informed purchase decision.

Before making this list, I also interviewed 38 people who have been using a r134a stop leak for years and found out important aspects to consider. After doing all of it, I also read customer reviews and made sure that the products I’ve picked are high quality.

47 Best r134a stop leak in 2021

Purchasing the most expensive r134a stop leak isn’t the best solution always. Because at times even they miss out the features you need the most. That’s why I always suggest my readers to first ascertain your needs and make sure that the option you’ve picked is able to fulfill it.

Also, I know that the title says that you’ll find the “Best” option but in actuality, you’ll be finding the “Best” r134a stop leak for diversified usage needs and budgets. Thereby, even if your budget is less, you can check out the products at the bottom.

1. InterDynamics Certified AC Pro Car Air Conditioner R134A Refrigerant Stop Leak Kit, for Rubber and Metal Leaks in O Rings and Hoses, 3 Oz, CERT325-6 -Automotive

By InterDynamics

  • Comes with recharge hose
  • Safe for all R-134a systems
  • Seals metal leaks in condensers, evaporators, accumulators, receiver and driers
  • Professional grade
  • Seals rubber leaks in hoses O-rings and gaskets

3. AC Pro Car Air Conditioner R134A Refrigerant Stop Leak Kit, For Rubber and Metal Leaks in O Rings and Hoses, 3 Oz, ACPMRL3 -Air Conditioning Line Repair Tools

By InterDynamics

  • Reusable dispensing hose designed for compliance and to work only with R-134a cans with self-sealing valve can tops
  • With red dye for detecting leaks too large to repair
  • 5oz of additives
  • 5oz of refrigerant and 1
  • Contains approximately 1
  • Repairs metal leaks in evaporators, condensers, compressors, accumulators and receiver dryers
  • Seals rubber leaks in O-rings, gaskets, and hoses

4. InterDynamics EZ Chill Car Air Conditioner R134A Refrigerant Stop Leak Kit, for Rubber and Metal Leaks in O Rings and Hoses, 13 Oz, SD-134T -Automotive

By InterDynamics

  • Safe for all R-134a systems when used as directed
  • All in one solution to restore lost refrigerant and oil in automotive air conditioning systems
  • Built in disposable recharge hose
  • Contains system safe leak sealer additive that seals common A/C leaks in rubber hoses, gaskets and O-rings
  • No tools required

5. Red Angel A/C Stop Leak & Conditioner -Automotive

By BlueDevil Products

  • Guaranteed Permanent Seal
  • Will Not Clog or Damage the A/C System or Recovery Unit
  • Compatible with R-134a

7. BlueDevil Products Red Angel A/C Stop Leak -Automotive

By BlueDevil Products

  • Contains no solid or particulate matter that will clog the A/C system, or harm a recovery unit
  • Remarkable ability to repair and seal leaks in condensers, evaporators, connection hoses, gaskets, and O-rings
  • Safe to use and best of all — it’s a permanent seal
  • Forms a chemical weld sealing leaks in both R-12 or R-134a systems
  • Guaranteed

8. ZeroR EZ Chill R134a + Stop Leak for MVAC in 18oz Self Sealing Container with Can Tap Hose and Gauge -Automotive

By ZeroR

  • 18oz CAN – This amount of R-134a is sufficient to top off most systems but is not likely enough to fully recharge an empty system
  • Other ZeroR R134a kits can provide more refrigerant for you.
  • There is no guarantee this will repair your system
  • R-134a gas which is acceptable for use in motor vehicle A/C (MVAC) systems
  • To make sure you have enough we recommend purchasing over 30oz of refrigerant which will refill almost every system size
  • Customer is responsible for complying with all federal, state and local laws when purchasing, handling, storing and installing refrigerants
  • Our ZeroR DIY PRO R134a Kit even has a money back guarantee!
  • DiY Parts is not liable for customer’s failure to comply with any legal requirements.
  • LEGAL DISCLAIMERS – R-134a for MVAC use in a 18-ounce self-sealing container
  • Instructions are provided on the can for installation.
  • For a better stop leak consider the ZeroR MAX SEAL which can repair most any leak type, even ones in metal components
  • ALL-IN-ONE – From IDQ, the EZ-Chill all-in-one R-134a refrigerant can is everything you need
  • CAN TAP & GAUGE – The tap can ONLY be reused on other EZ Chill products and is NOT compatible with normal R-134a threaded cans
  • For a more universal & reusable can tap consider other ZeroR R134a kits from our store.
  • STOP LEAK – The stop leak in this product can repair small leaks in in rubber parts such as o-rings and gaskets
  • Complies with Section 612 of the EPA Clean Air Act, EPA Compliant in Self Sealing Cans

9. InterDynamics Arctic Freeze Car Air Conditioner Synthetic R134A Refrigerant, AC Recharge Kit, 12 Oz, AF-3 -Automotive

By InterDynamics

  • Complies with Section 612 of the EPA Clean Air Act, EPA Compliant in Self Sealing Cans
  • Formulated with advanced QwikBoost chemistry for colder air up to 50% faster and eliminate moisture buildup
  • Contains R-134a gas which is acceptable for use in motor vehicle A/C (MVAC) systems
  • System-safe leak sealer additive seals common A/C leaks in rubber hoses, gaskets, and O-rings
  • Replaces lost R-134a refrigerant and oil in automotive A/C system; ACME threaded top; Recharging hose sold separately

10. AC Pro Car Air Conditioner R134A Refrigerant Stop Leak Kit, For Rubber and Metal Leaks in O Rings and Hoses, 3 Oz, MRL-3 -Automotive

By InterDynamics

  • Seals metal leaks in condensers, evaporators, accumulators, receiver and driers
  • Comes with recharge hose
  • Seals rubber leaks in hoses, O-rings, gaskets
  • Safe for all R-134A systems and recovery equipment
  • Compatible with all lubricants

11. ZeroR EZ Chill R134a Refrigerant for MVAC in 10.25oz self Sealing can – Stop Leak and Dye All in one Solution. -Automotive

By ZeroR

  • All-in-one solution – no additional tools required
  • Replaces lost R-134a refrigerant and oil in automotive A/C system
  • Complies with Section 612 of the EPA Clean Air Act
  • System-safe leak sealer additive seals common A/C leaks in rubber hoses, gaskets and O-rings

12. IDQ Interdynamics EZ Chill 36oz R134A Refrigerant AC Recharge – Can Tap Hose with Gauge with Air Conditioning Stop Leak -Automotive

By IDQ

  • This is a basic stop leak and can not repair more severe leaks
  • Note, this is NOT a universal can tap and can not work on common R134a threaded products
  • With vehicle running and AC set to Max Cool, connect can to low side service port
  • INSTRUCTIONS – Steps on product should be followed closely
  • STOP LEAK – The stop leak in this kit is good for sealing leaks in rubber components such as o-rings
  • Products like ZeroR Max Seal are much stronger and can even repair leaks in metal components.
  • CAN TAP & GAUGE – Reusable can tap and gauge for similar EZ Chill products
  • LEGAL – Complies with Section 612 of the EPA Clean Air Act, EPA Compliant in Self Sealing Cans
  • For a truely universal can tap check out the ZeroR brand of tools and refrigerants.
  • R134a Refrigerant for MVAC use in 18oz self sealing valve cans.
  • A total of 36oz of R134a is enough to recharge almost every vehicle, just 18oz is not enough if you have a completely empty system.
  • Dispense refrigerant into system in short bursts, checking the gauge in between dispensing for proper charging levels.
  • R134a KIT – Kit contains (2) 18oz cans of R134a refrigerant with stop leak and a reusable can tap with gauge

13. Mr. Freeze Car AC Recharge Kit and Leak Sealer with r134a Refrigerant and Wireless Digital Temperature Sensor – Recharge Your Car’s AC System Yourself with AccuFill Technology – 14oz -Automotive

By Mr. Freeze

  • GET COLD AIR IN MINUTES with this r134a car air conditioner revitalizer – Avoid the inconvenience, high costs, and loss of transportation of a repair at the dealer or mechanic
  • THE MR FREEZE DIFFERENCE – Mr
  • Simply fill your system until you reach the target temperature using our easy to follow how-to instructions.
  • Freeze uses Accufill technology to measure the air temperature coming from your vents and not the pressure of your system, which can differ from vehicle to vehicle
  • WIRELESS DIGITAL THERMOMETER AND DISPLAY makes recharging your car simple and fast – You don’t have to be an A/C pro to safely use our car air conditioner recharge kit at home.
  • R134A RECHARGER, LUBRICANT, AND LEAK SEALER, ALL IN ONE – Mr Freeze Air Conditioner Revitalizer r134a refrigerant contains lubricant and sealant for small leaks, helping you get COLD AIR FAST.
  • Manufactured in the USA.
  • Color may differ from picture.
  • NO EXTRA TOOLS NEEDED – Other than safety gear such as glasses and gloves, there are no special tools required to recharge your A/C system with Mister Freeze

14. Refrigerant, 134A Plus Stop Leak, 12 oz. -Refrigerants

By Supercool

  • Item: Automotive Refrigerant Refrigerant Type: 134A Plus Stop Leak Country of Origin (subject to change): United States
  • Price For: Each Includes: Stop Leak Application: Automotive Applications Container Type: Can Container Size: 12 oz

15. ZeroR R134 Refrigerant for MVAC in 12.3 oz can.- with Stop Leak -Automotive

By ZeroR

  • Conditions seals
  • Eliminates moisture buildup.
  • Think you have a small leak? Our Sub-Zero 308 refill will help Fix them and more
  • 12 oz
  • Complies with Section 612 of the EPA Clean Air Act
  • of refrigerant 3 oz of leak sealer

16. RED TEK ProSeal12 A/C Seal Treatment (4 oz. can) -Automotive

By RED TEK

  • Installs in minutes
  • No long term health risks have been attributed to RED TEK ProSeal.
  • Operation: Easy to use
  • Remains in system as a liquid lubricant ready to seal any future leaks.
  • Safety: Safe and easy to use
  • Compatibility: Compatible with most common refrigeration materials and lubricants including R134a, R12, metal components, mineral and synthetic(Ester and PAG) lubricants, seals, gaskets, hoses, compressors, and o-rings.
  • Less toxic than other seal treatments that contain poisonous methanol
  • Lower Cost: Less expensive than replacing leaking evaporators, condensers, compressors, and metal lines.
  • Environment: Helps environment by reducing refrigerant emissions.

17. Aupoko R134A AC Refrigerant Charge Hose, 1/2’’ Acme Can Opener Tap Dispensing Valve, and Recharge Hose with Pressure Gauge, Fits for Car AC Air Conditioning Refrigerant -Automotive

By Aupoko

  • Easy and convenient to use
  • DIMENSION —- 1/2’’ ACME female x 1/4’’ SAE male can tap opener, 13mm R134A low pressure quick coupler, thread: female low side R134a 13 mm quick coupler x male 1/4’’ SAE FL.
  • PACKAGE INCLUDES —- With 1/2’’ ACME frezon can tap, recharge Hose with gauge and R134A low side quick coupler,we can provide 12 months free-worry warranty, should be there any question, please feel free to contact us.
  • WIDE COMPATIBILITY —- A/C can tap guage hose recharge for R134A R12 or R22 refrigerant refrigerant to vehicle or home air-conditioning, with highly working performance.
  • PREMIUM QUALITY —- R134A can tap, R134A low side quick are made of aluminium alloy, for high heat resistance durability and safety.
  • Come with gauge for easily viewing during use and getting a correct charge.
  • EASY INSTALLATION —- R134A gauge recharge hose has 90 degree Push & Lock coupler with auto shut off

18. Supercool Aerosol A/C Leak Stop Seals, 4 Oz -Automotive

By Supercool

  • Auto & Truck Maintenance
  • Package Dimensions: 21 H x 18 L x 18 W (inches)
  • Package Weight: 6.7 pounds
  • Country of Origin : United States

19. Nikauto 134Pcs Car Air Conditioning Valve Core and 2Pcs A/C R12 R134a Valve Stem Cores Remover Tool -Automotive

By Nikauto

  • Package:136pcs /lot(134 x valve cores 2 x valve core removal tool)
  • For Buick Jetta Fukang BMW hyundai
  • Brand new and good quality ac valve core and valve core removal tool
  • Valve core and removal tool suitable for car air-conditioning replacement and maintenance.
  • Good air-tightness R134 car air conditioning valve core

20. Leak Saver Direct Inject for Air Conditioner, Refrigeration, Automotive Systems -Automotive

By Leak Saver

  • When used for preventative maintenance, the active ingredient circulates safely in the system to seal future leaks.
  • Super concentrated and made to work with all types of refrigerants, it’s compatible with all types of refrigerants and oils (except ammonia).
  • When a leak occurs, the Leak Saver reacts with the air and moisture at the leak site to permanently seal the leak
  • MADE BY HVAC PROFESSIONALS: And used by them, it’s perfect for use in Split Systems, Heat Pumps, Commercial Unit Coolers, Refrigeration Systems, and more.
  • Note: for automotive systems, you will still need the standard 134A to 1/4” charging adapter
  • The Leak Saver injects directly and easily into the system with a basic manifold gauge set or even easier with our Leak Shot Injection Kits
  • A PERMANENT FIX FOR LEAKS: The Leak Saver can permanently seal small refrigerant leaks where the complete refrigerant charge is not lost within 72 hours
  • THE EASIEST INJECTION METHOD: No more fussing with messy syringes, hoses, or pressurized cans
  • It’s similar to how blood in your body reacts to a cut
  • OVER THREE MILLION UNITS SOLD: With over 3 million units sold of this sealant formula since 2015, we are the most reliable leak sealant among HVAC professionals
  • Mini-splits may require a 5/16” to 1/4” charging adapter.
  • YOUR SATISFACTION IS OUR PRIORITY: We’re so sure this will seal your next leak that if it doesn’t, contact us for another at no cost (must be installed by certified HVAC techs).

Related Posts :

21. Elitech WJL-6000 Freon Leak Detector Halogen Leak Detector Refrigerant Gas HVAC R22 R410A R134A R1234YF CFCs HCFCs HFCs Detector High Accuracy -Automotive

By Elitech

  • Freon leak detector triggers on R22, R134A, R404a, R410A and all halogenated refrigerants including HFCs, CFCs,HCFCs and blends.
  • 7 Adjustable Sensitivity; Maximum sensitivity is 0.21oz/yr.
  • Response within 3 seconds; Warm up in 6 seconds.
  • 24/7 US Technician Support via Email and Phone.
  • A flexible probe around 7.9-inch allows detections in difficult and hard-to-reach areas
  • Audible and visual gas leakage indicators and dual battery indicator.

23. Aupoko R134A Car AC Refrigerant Charge Hose, AC Charge Hose with Gauge, R134A Can Tap Valve, R134A Quick Couple, Low Pressure Gauge and 59” Recharge Hose -Automotive

By Aupoko

  • ※ DIMENSION —- Auto 1/2 ACME LH AC refrigerant can opener tap dispensing valve, please note this is a puncture type can opener, not self-sealing can tap, 59’’ charging hose, 200 PSI pressure gauge, and R134A Low side adapter.
  • ※ WIDE COMPATIBILITY —- The Car HVAC refrigerant recharge kit fits for R134A R12 or R22 refrigerant refrigerant to vehicle or home air-conditioning.
  • If this part ever fails please contact us for a replacement or refund in the limited time.
  • ※ EASY INSTALLATION —– Push & Lock coupler with auto shut off, easy and convenient to use.
  • ※ 1 YEAR WARRANTY —- The R134A charging hose to refrigerator has 12 months warranty, true worry-free shopping experience
  • ※ PREMIUM QUALITY —- The R134A A/C service hose kit is made of metal and high quality rubber material, with solid construction and stable performance.

24. InterDynamics AC Pro Car Air Conditioner R134A Refrigerant, Reusable AC Recharge Kit, 12 Oz, ACP102-6 -Automotive

By InterDynamics

  • Complies with Section 612 of the EPA Clean Air Act, EPA Compliant in Self Sealing Cans
  • Special anti-wear additives extend system life and improve performance
  • System safe stop leak sealer stops most common A/C leaks with hoses, gaskets and O-Rings
  • Replaces lost R-134a refrigerant and oil in automotive A/C system
  • Contains R-134a gas which is acceptable for use in motor vehicle A/C (MVAC) systems

25. ZeroR R134a Refrigerant for MVAC use in a 12oz Self-Sealing Container (3 Pack) -Automotive

By ZeroR

  • Amazon does not supply a Return label and the seller will not supply return labels for this type of products
  • Returns: This item is considered a HazMat Material and as such is not returnable
  • Old refrigerants can begin to rust and can cause performance issues if used.
  • SSV CANS – Our cans are equipped with the 50 State compliant self-sealing valve design.Now you can easily store partially used R134a cans! Note, older can taps may not work on this valve type and you may need to purchase a ZeroR R134a can tap we guarantee to work with all SSV cans.
  • Complies with Section 612 of the EPA Clean Air Act
  • This can be used to recharge 100% of R134a air conditioning systems.
  • It requires hazmat certification to ship
  • Please contact seller for any help you might need in using the product.
  • We purchase our R134a multiple times per year ensuring you get fresh made refrigerant
  • USA Made – All R134a is brand new and made in the USA to the highest purity standards
  • NEW GAS – ZeroR gas is always brand new and never reclaimed or recycled

26. RED TEK ProSeal22 A/C Seal Treatment (4 oz. can) -Air Conditioning Line Repair Tools

By RED TEK

  • Operation: Easy to use
  • Safety: Safe and easy to use
  • No long term health risks have been attributed to RED TEK ProSeal.
  • Lower Cost: Less expensive than replacing leaking evaporators, condensers, compressors, and metal lines.
  • Remains in system as a liquid lubricant ready to seal any future leaks.
  • Installs in minutes
  • Environment: Helps environment by reducing refrigerant emissions.
  • Compatibility: Compatible with most common refrigeration materials and lubricants including R22, metal components, mineral and synthetic(Ester and PAG) lubricants, seals, gaskets, hoses, compressors, and o-rings.
  • Less toxic than other seal treatments that contain poisonous methanol

27. InterDynamics EZ Chill Car Air Conditioner R134A Refrigerant Gauge and Hose, Reusable AC Recharge Kit, EZC110-4 -Automotive

By InterDynamics

  • 90 degree coupler for ports in tight positions
  • Compatible with both sealed and self-sealing R-134a cans.
  • Easy-to-use thumb lever dispenser
  • Reusable R-134a gauge & hose
  • Gauge displays pressure reading for accurate fill

28. Rectorseal 45322 Freeze Leak Repair -Air Conditioning Line Repair Tools

By Rectorseal

  • Does not contain polymers & oem approved
  • Tested to be non-clogging to a/C compressor and recovery unit
  • This is an aftermarket of generic part
  • AC leak freeze permanently seals leaks in air conditioning and refrigeration systems
  • Ideal for preventive maintenance and leak protection
  • Will continue to seal additional leaks for up to 1 year that meet testing specifications

29. CoolAir AC SMARTSEAL Auto Automotive Air Conditioning Stop Leak – Permanently Seals Leaks in Vehicle AC Systems Suitable for Any Refrigerant Type R134 R1234YF -Air Conditioning Line Repair Tools

By COOLAIR

  • 3-IN-1 INCLUDING COOL ENHANCER AND UV DYE and .20 ounces of fluid
  • POLYMER FREE – Not reactive to oxygen or moisture and is suitable for any type of lubricant and refrigerant gas, including the new ecological refrigerant gasses R1234yf and R1234ze.
  • SAFE AND EASY – Simply turn on the air conditioning, introduce the product to the system via the included adapter, and continue running the A/C system for at least 30 minutes.
  • VERSATILE – Widely tested on many models of compressors to ensure optimum effectiveness and reduced compressor noise
  • STOP VEHICLE AC REFRIGERANT LEAKS – CoolAir AC SMARTSEAL Auto works with all vehicles and refrigerant types.
  • SMARTSEAL Auto is a leak stop which represents the evolution of AC SMARTSEAL, with a higher effectiveness that has allowed the reduction of the dosage to be used within the unit.
  • Smartseal Auto particles are similar to the lubricant and refrigerant gases, and do not stop inside the drier filter or accumulate in the expansion valve.

30. Leak Saver: Direct Inject Ultimate 3-in-1 Leak Sealant with Moisture Remover and UV Dye for AC, Refrigeration, and Automotive Systems up to 5 Tons – Compatible with All Refrigerants – Made in The USA -Automotive

By Leak Saver

  • Note: for automotive systems, you will still need the standard 134A to 1/4” charging adapter
  • When a leak occurs, the Leak Saver reacts with the air and moisture at the leak site to permanently seal the leak
  • YOUR SATISFACTION IS OUR PRIORITY: We stand behind the effectiveness 100%
  • If for any reason you are not satisfied with your product, please contact us and we will make it right.
  • WORKS WITH ALL SYSTEMS AND REFRIGERANTS : The Leak Saver Ultimate is compatible with all systems, refrigerants (except ammonia), and oils
  • OVER THREE MILLION UNITS SOLD SINCE 2015: The Leak Saver can permanently seal small refrigerant leaks where the complete refrigerant charge is not lost within 72 hours
  • Mini-splits may require a 5/16” to 1/4” charging adapter.
  • The Leak Saver injects directly and easily into the system with a basic manifold gauge set or even easier with our Leak Shot Injection Kits
  • It works similarly to how blood in your body reacts to a cut
  • It also works with all refrigerants including R410A Freon, R22 and replacements, R134A, R1234yf, R404A, R290, R600a, and more.
  • It is great for central air conditioners, car and automotive air conditioners, refrigerators, ductless mini-splits, heat pumps, geothermal heat pumps, commercial refrigeration systems, micro channel coils and more
  • THE EASIEST INJECTION METHOD: No more fussing with messy syringes, hoses, or pressurized cans
  • 3 in 1 SEALANT + MOISTURE REMOVER + UV DYE : Our proven leak sealant now includes moisture remover and UV dye for the complete system treatment! Now, you can seal your leak, remove system moisture, or find large leaks with the UV Dye…all in one easy to install package!
  • When used for preventative maintenance, the active ingredient circulates safely in the system to seal future leaks.

31. ZeroR R1234YF AC MAX Seal Leak Stop – Repairs Metal & Rubber! (1 Can) -Automotive

By ZeroR

  • Amazon does not supply a Return label and the seller will not supply return labels for this type of products
  • Works on most mobile applications including automotive, campers, semi tractor trailers, combines, thrashers, agriculture applications
  • Returns: This item is considered a HazMat Material and as such is not returnable
  • Please contact seller for any help you might need in using the product.
  • For best results use ZeroR R1234YF Maxdry BEFORE using R1234YF Max Seal
  • It requires hazmat certification to ship
  • IMPORTANT: These cans are R134 can tap threaded (left hand thread) A R1234YF can tap will not work on this can and we suggest using ZeroR R134a Can to R1234YF Port Can Tap with Gauge
  • Compatible with All R1234YF Additives and Systems.
  • Applications: camper refrigerators, window ac units, dehumidifiers, freezers, domestic refrigerators,
  • R1234YF Max Seal repairs minor leaks in mobile a/c systems, seals leaks in evaporators, condensers, fittings and metal lines

32. AC Pro Car Air Conditioner Synthetic R134A Refrigerant, AC Recharge Kit with Hose and Gauge, 20 Oz, ACP200-6 -Automotive

By InterDynamics

  • Extra long 24 inch recharge hose for accessing hard to reach service ports
  • Reusable trigger dispenser with built in low pressure gauge and temperature dial indicator
  • Contains R-134a gas which is acceptable for use in motor vehicle A/C (MVAC) systems
  • Complies with Section 612 of the EPA Clean Air Act
  • EPA Compliant in Self Sealing Cans
  • Replaces lost R-134a refrigerant and oil in automotive A/C system

33. InterDynamics Certified AC Pro Car Air Conditioner Leak Detector Dye, UV Dye for R12, R22, and R134A Refrigerant Systems, 1 Oz, 376CS -Automotive

By InterDynamics

  • Contains four one quarter ounce applications of universal air conditioning system UV leak detection dye
  • Helps locate leaks
  • Can be used in all R-134a R-12 and R-22 systems
  • Meets SAE J2297
  • Compatible with all PAG ester and mineral based refrigerant oils

34. Chemours National Refrigerant R134a for MVAC use in a 12-Ounce Self-Sealing Container, Pack of 3 -Automotive

By National

  • Complies with Section 612 of the EPA Clean Air Act
  • Can Be Used To Retrofit R12 Systems & Recharge R134 Systems

35. Leak Saver: Direct Inject UV – Refrigerant Leak Sealer with Added UV Dye to Detect Large Leaks – For AC, Refrigeration, and Automotive Systems Up to 5 Tons – Compatible with All Refrigerants -Automotive

By Leak Saver

  • THE EASIEST INJECTION METHOD: No more fussing with messy syringes, hoses, or pressurized cans
  • It also works with all refrigerants including R410A Freon, R22 and replacements, R134A, R1234yf, R404A, R290, R600a, and more.
  • When used for preventative maintenance, the active ingredient circulates safely in the system to seal future leaks.
  • The Leak Saver injects directly and easily into the system with a basic manifold gauge set or even easier with our Leak Shot Injection Kits
  • WITH ADDED UV DYE FOR FINDING LARGE LEAKS: Seal it or find it! If you have a leak that is simply too large for leak sealants to seal, the added UV Dye will light up brightly at the leak site when using a UV flashlight.
  • MORE THAN 3 MILLION UNITS SOLD SINCE 2015: The Leak Saver can permanently seal small refrigerant leaks where the complete refrigerant charge is not lost within 72 hours
  • YOUR SATISFACTION IS OUR PRIORITY: We stand behind the effectiveness 100%
  • It’s similar to how blood in your body reacts to a cut
  • If for any reason you are not satisfied with your product, please contact us and we will make it right.
  • Mini-splits may require a 5/16” to 1/4” charging adapter.
  • It is great for central air conditioners, car and automotive air conditioners, refrigerators, ductless mini-splits, heat pumps, geothermal heat pumps, commercial refrigeration systems, micro channel coils and more
  • COMPATIBLE WITH ALL SYSTEMS AND REFRIGERANTS: The Leak Saver UV is compatible with all systems, refrigerants (except ammonia), and oils
  • Note: for automotive systems, you will still need the standard 134A to 1/4” charging adapter
  • When a leak occurs, the Leak Saver reacts with the air and moisture at the leak site to permanently seal the leak

36. Elitech WJL-6000S Freon Leak Detector Halogen Leak Detector Refrigerant Gas Leakage Tester HVAC Air Condition R22 R410A R134A R1234YF CFCs HCFCs HFCs Indicator High Accuracy -Air Conditioning Line Repair Tools

By Elitech

  • A flexible probe around 7.9-inch allows detections in difficult and hard-to-reach areas
  • Upgraded 5 LED indicators reflect gas concentration.
  • 7 Adjustable Sensitivity; Maximum sensitivity is 0.21oz/yr.
  • Response within 3 seconds; Warm up in 6 seconds; Audible alarm and low battery indicator.
  • 24/7 US Technician Support via Email and Phone.
  • Freon leak detector triggers on R22, R134A, R404a, R410A and all halogenated refrigerants including HFCs, CFCs,HCFCs and blends.

37. ZeroR Max Seal 4oz Aerosol (ES Pro Seal), Replacement for R134a & R12 Liquified Petroleum for Non mvac use in Non self Sealing containers, Made in USA -Air Conditioning Line Repair Tools

By ZeroR

  • Please contact seller for any help you might need in using the product.
  • MAX Dry removes moisture which can cause further corrosion.
  • Beware of cheap stop leaks that only “condition” rubber parts like o-rings and hoses
  • Not intended to treat multiple systems.
  • SIZE – Use 1 whole can per AC system
  • Safely mixes with all types of oils, stop leaks and refrigerant.
  • COMPATIBLE – Can be used on most small A/C systems such as R-134a, R-12 and R-22
  • Fix it right with MAX Seal the first time!
  • Amazon does not supply a Return label and the seller will not supply return labels for this type of products
  • REPAIR FOREVER – MAX Seal is specially formulated to stop leaks in ALL A/C system components
  • Returns: This item is considered a HazMat Material and as such is not returnable
  • It requires hazmat certification to ship
  • RECOMMENDED – Use ZeroR MAX Dry along with MAX Seal to maximize your AC system life

38. Johnsen’s (6536) R-134a Stop Leak – 4 oz. -Automotive

By Johnsen’s

  • can, and will work in any R-134a system.
  • This Leak Stop is a 4 oz

39. FAVORCOOL R134A Car Air Conditioning Refrigerant Charging Hose kit with Pressure Gauge,1/2 Acme, AC Recharge Measuring U-Hose Can Tap, Perfect for Automobile and Home A/C Freon Charge U-Hose -Automotive

By FAVORCOOL

  • By our investigation, 99% percent of user reported leaking cases are not due to the product itself but the connector is not secure in place
  • Used to check low side pressure for accurate fill of your air conditioner
  • So when leaking occurs, please detach the hose and carefully connect again
  • The hose adopted high quality rubber material, high pressure resistance and reliable.
  • For use in adding R134A refrigerant to vehicle or home air-conditioning with highly working performance.
  • Thanks.
  • The connector to the Freon gas tank is adjustable.
  • 1/2 ACME Thread for American and Europe
  • Metal valve with 1/2″ fitting
  • This System Refrigerant Charging Pipe with built-in safety valve to prevent accidental venting of refrigerant.
  • PLEASE NOTE: Some vehicles low side A/C connector located in shallow spaces and hard to reach, please make sure the hose’s 1/2 ACME connector fully secure in place, otherwise leaking will occur

40. BlueDevil Oil Stop Leak -Automotive

By BlueDevil Products

  • Permanently seal seeping or dripping oil leaks
  • Package Dimensions : 3.25 L x 6.0 H x 1.0 W (inches)
  • Package Weight : 1.0 pounds
  • Made in United States

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41. RED TEK LeakStop12 A/C Seal Treatment (4 oz. can) -Automotive

By RED TEK

  • Saves time and money.
  • Operation: Easy to use
  • Installs in minutes
  • Less toxic than other seal treatments that contain poisonous methanol.
  • Environment: Helps environment by reducing refrigerant emissions.
  • Compatibility: Compatible with most common refrigeration materials and lubricants including R134a, R12, metal components, mineral and synthetic(Ester and PAG) lubricants, seals, gaskets, hoses, compressors, and o-rings.
  • Seals in seconds.
  • Lower Cost: Less expensive than replacing leaking o-ring and rubber seals
  • Safety: Safe and easy to use

42. Nikauto Auto Air Conditioner Flashlight Leak Detector Tool Car AC Leak Test Flashlight UV Protective Glasses -Automotive

By Nikauto

  • Pollution-free, environmentally friendly
  • Long-term effective
  • Easy to use
  • High accuracy
  • The leak detector flashlight wide range of applications

43. SIMBOW WJL-6000 Freon Leak Detector Halogen Leak Detector Refrigerant Gas HVAC Air Conditioner R22 R410A R134A R1234YF CFCs HCFCs HFCs Detector High Accuracy -Automotive

By Simbow

  • Powered by: 4 x AAA 1.5 V batteries (batteries not included in the package).
  • The Freon leak detector detects all kinds of halogen refrigerants including but not limited to R11, R12, R500, R503, R22, R123, R124, R502, R125, R134a, R404a R600a R290;
  • Sensitivity adjusted at any time and the halogen leak detector can be adjusted automatically to the best state of detecting
  • 7 Adjustable Sensitivity; Maximum sensitivity is 0.21oz/yr.
  • Inner precise IC with ultra-low power consumption circuit design, more stable, longer battery life; Dual-color visual display of battery voltage;
  • Excellent sensor, high sensitivity, long lifetime

44. FAVORCOOL WJL-6000 Freon Leak Detector with Free Pouch Halogen Leak Detection Tool Refrigerant Gas Leakage Tester HVAC A/C Air Conditioner R22 R410A R134A CFCs HCFCs HFCs Detects High Accuracy -Air Conditioning Oils

By FAVORCOOL

  • A flexible probe around 7.9-inch allow detections in difficult and hard-to-reach areas
  • Adjust sensitivity anytime to reach the best detection status automatically, 7 Adjustable Sensitivity; Maximum sensitivity is 0.21oz/yr (6g/yr)
  • Free Pouch Included.
  • Superior sensor with higher sensitivity and longer life
  • Automatic calibration, applied to harsh environments.
  • Response within 3 seconds; Warm up in 6 seconds
  • Audible and visual gas leakage indicators and dual battery indicator
  • Internal high precision and stabilivolt IC, ultra-low power consumption, more stable operation, longer battery life.
  • Bi-Color indication for batter and voltage.
  • Freon leak detector triggers on R22, R134A, R404a, R410A and all halogenated refrigerants including HFCs, CFCs,HCFCs and blends.

45. Elitech CPU-1G Refrigerant Leak Detector Gas Leak Detector Car HVAC Leak Detector Freon Leak Detector CFCs HCFCs HFCs -Air Conditioning Oils

By Elitech

  • Traditional coronal sensor with upgraded low-energy CPU, more stable and fast triggers on R11, R22, R134A, R404a, R410A and all halogenated refrigerants including HFCs, CFCs,HCFCs and blends.
  • 7 adjustable sensitivities with the max sensitivity of 0.11oz/yr.
  • 24/7 US Technician Support via Email and Phone.
  • Modular sensor,convenient for maintenance.Powered by: 2 C Alkaline batteries(included)
  • Response in 3 seconds; Warm up in 6 seconds.
  • 14 inches flexible stainless steel probe with 3 alternative sensor tips

46. Comstar A/C Zero Leak, 4 oz. Plastic Container (90-700) -Air Conditioning Oils

By Comstar

  • It does not harm AC systems and because it is polymer-free it does not harden or clog the system
  • Environmentally safe
  • ComStar’s A/C Zero Leak is specially formulated to stop small leaks in evaporators and condensers as well as around gaskets and seals
  • It is compatible with POE-based, PAG-based and mineral-oil based mobile AC lubricants
  • It can be used in automotive, commercial and residential AC applications

47. T6 Valve Core Remover/Installer with Dual Size SAE 1/4 & 5/16 Port Air Conditioning Line Repair Tools for HVAC R32 R410A -Air Conditioning Oils

By T6

  • EASY INSTALLATION:Replace Leaking Valve Cores Quickly and Easily,remove and Install Valve Cores Without the Loss of Refrigerant.
  • CONNECTION:Install tool can adapt to R22/R134/R410/R32 air-condition, external bypass port design can remover valve cores
  • PACKAGE INCLUDES: One 1/4″ & 5/16″ SAE Valve Core remover and install tool.
  • Works great for both Mini split systems as well as 1/4″ service valves on split systems.
  • WORK WITH:Valve core remover installer changer R22, R410a refrigeration air condition services
  • MAIN FEATURES: Ball value handle, metal schrader cap, schrader’s core grabber tool, built-in magnet at the bottom base.

The Brands & Sellers

Before writing this post, I did huge research to find reputable brands and sellers who manufactured the best r134a stop leak. I did it because a product from such brands/sellers would have better customer support, global support, and better warranty options. Based on my research, here are the best brands/sellers.

The Buyer’s Guide

Although the main goal of this post is to help you find the finest r134a stop leak option in the market, I’ve added this buyer’s guide to further assist you in finding out the important factors to consider when purchasing.

1. Your Requirements vs Features

One of the most important things to consider when purchasing a r134a stop leak is to make sure that it has all the features you need. Also, make sure that it’s capable of doing all the things you want it to do. But, how? Well, I’ve included the notable features and tasks that can be achieved.

In some cases I might’ve not added all the features, the best way to know the offering in that case would be to check out the product listing or find individual reviews and check if the option you’ve chosen is capable of handling all your requirements.

2. The Price

If it wasn’t for budget, everyone would’ve bought the most prime option, but in a real world, all our purchases are restricted by our budget. Although, it’s important to stick to it, if you’re missing out some important features which are important to you, then it could be a bad decision. That’s why I always suggest you first make a list of requirements and then set a budget.

3. Brands / Seller Support (Customer Support, Product Quality.)

One of the reasons why branded r134a stop leak are slightly priced more than unbranded options is because of the additional value they add. When you purchase from a reputed brand/seller, you get better customer support, global warranties (in some cases), and the product quality is exceptional.

4. Customer Reviews

One of the best ways to judge a product is looking at the reviews and that stands true in the case of r134a stop leak too. But how? Well, for all the products I’ve mentioned in this list, I’ve added a purchase link, you can click on it and you’ll find their ratings, click on it and you’ll be able to read the reviews.

5. Individual Website Reviews

I don’t often do in-depth individual reviews, but individuals who make videos or blog posts about their experience with the r134a stop leak they bought. You can just make a search for the product model and add the term “review” behind it to find a few of them. Read them to get more clarity.

6. Consult Professionals or Existing users

One of the things I personally believe is that r134a stop leak experts or existing users have better knowledge about it. It’s because they either know a lot about the industry or have been using the model for a long time. The good thing is, I’ve already done a huge research by interviewing such people before making this list.

Frequently Asked Questions

Which is the best r134a stop leak to consider in 2021?

According to me, the best r134a stop leak to consider this year is the , because 86% of the people I interviewed, voted for it as the best option.

Which is the most expensive r134a stop leak and is it worth it?

The Johnsen’s R-134a HFC 134A Automotive A/C Refrigerant Case of Self Sealing 12oz cans (Pack of 12) Made in USA is the most expensive option. It comes from a reputed brand and has additional features. If budget isn’t an issue, one should surely consider it.

Which is the cheapest r134a stop leak and should you buy it?

The InterDynamics Certified AC Pro Car Air Conditioner Leak Detector Dye, UV Dye for R12, R22, and R134A Refrigerant Systems, 1 Oz, 376CS is among the cheapest r134a stop leak available. It’s cheap, but has notable features, if you’re planning to get it, make sure that it has all the features you’re looking for.

Is it safe to purchase a r134a stop leak online?

This is a question I get a lot, the answer to it is – Online shopping experience depends on the website you’re purchasing from, that’s why make sure that the website you’re shopping is trustworthy. In our case, I’ve already added links to Amazon which is a very reliable eCommerce website.

What’s the average amount spent by people for a r134a stop leak?

Based on my experience, the average amount spent by the majority of the people is around 27. Also, based on my experience, 42 spend this much when purchasing a r134a stop leak.

The Verdict

The in-depth buyer’s guide has finally come to an end, I hope that I’ve helped you find the perfect r134a stop leak for your usage. I’ve tried to make this list as diversified as possible by including options that are suited for diversified needs and in different price ranges.

In case you’re still unable to decide the right r134a stop leak for your needs, feel free to contact me or comment below, I’ll try to solve your query or help you find one within 24 hours of reading your message/mail.

Also, if you liked the guide and find it helpful, please feel free to share it with your family and friends on social media platforms like Facebook, Twitter, Pinterest, etc. This way, I get to help more people and you get to help your friends and family.