The 10 Best R134a Stop Leak Reviews & Comparison

The 10 Best R134a Stop Leak Reviews & Comparison

When you are repairing a refrigerant leak, it is important that you use the right stop leak. R-134a is a widely used refrigerant and leaks are common. Stop leak can help you seal the leak and prevent the loss of refrigerant. However, you have to make sure that you are using the right one. R-134a is a HFC refrigerant. It contains a mixture of low-pressure, medium-pressure, and high-pressure components.

R-134a was introduced to replace R-12, a HCFC refrigerant. Like R-12, R-134a is also a hydrocarbon refrigerant. The low-pressure refrigerant is made up of 50% propane and 50% butane. The medium-pressure refrigerant is made up of 70% propane and 30% butane. The high-pressure refrigerant is a mixture of 75% propane and 25% butane.

Top 10 r134a stop leak Review for 2023

When it comes to repairing air conditioning systems, there’s a lot more involved than just topping off the refrigerant. To ensure the system stays in top shape, you must properly diagnose the issue, stop the leak, and refill the system with the correct amount of refrigerant.

To get the job done, you’ll need an effective stop-leak product that’s compatible with your system’s refrigerant.

1. InterDynamics Car Air Conditioner Refrigerant Stop Leak Kit, Certified A/C Pro Leak Stop Kit for R134A Car Air Conditioners, 3 Oz Each

Features :

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

Additional Info :

Release Date 2013-06-21T00:00:01Z

This kit contains 4 bottles each of 3 oz of refrigerant oil and gas so that you can fix up to 4 leaks. It works with R-134a, which is the refrigerant used in most car air conditioners. This is a certified A/C pro leak stop kit for car air conditioners. It can stop leaks in the evaporator, condenser, or drier.

The refrigerant oil and gas in this kit are certified by EPA, which means that they are environmentally safe. The refrigerant oil used in this kit is also 100% compatible with all car air conditioners. It is formulated specifically to stop leaks without damaging any of the critical components of your car’s air conditioner.

2. BlueDevil Products Red Angel 00222 A/C Stop Leak & Conditioner – 4.5 Ounce

Features :

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

Additional Info :

Color Yellow
Item Dimensions
Height 5.5
Width 2.25
Length 2.25
Weight 0.28125
Release Date 2014-09-12T00:00:01Z

BlueDevil Products is a company based in Southern California that produces and distributes a variety of plumbing products, including a home-use AC stop leak product. This stop leak is designed to help prevent leaks from occurring in central air conditioning systems, as well as repair existing leaks. BlueDevil’s AC stop leak comes in a 4. 5-ounce container.

It is designed for use on the refrigerant lines of central air conditioning systems. It is intended to be used between the outdoor condenser and the indoor evaporator coil. This product is not designed for use with the lines connected to the outdoor compressor.

3. Red Angel 49496 A/C Stop Leak – 2 Ounce

Features :

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

Additional Info :

Color Red
Item Dimensions
Height 3.9
Width 2
Length 0.9
Weight 0.000625
Release Date 2014-10-03T00:00:01Z

This is a great solution for repairing a leaky condenser fan motor on a central air conditioning system. The product works inside the system, and it can also be used to stop refrigerant leaks. The sealant can be used in homes with or without refrigerant. The solution is non-toxic, non-flammable, and safe to use around children and pets. It works on a variety of materials, including copper, lead, aluminum, steel, brass, and PVC.

It can also be used to seal a leaky pipe or hose. The red angel 49496 sealant is easy to use in AC units. Pump the solution into the condenser fan motor until the leak stops.

4. INTERDYNAMICS-QUEST R134a Leak Detector – Sealer – 3 OZ

Features :


Additional Info :

A low-cost yet efficient solution for your refrigerant leak detection, this sealer from Interdynamics can be used on R12, R134a, and R22 refrigerants. It is non-toxic, and its 3-ounce capacity can be used for up to 25 detection spots. This leak sealer can be used on most surfaces, including vinyl, foam, and aluminum. It can be used on refrigerators, AC units, and other appliances, ensuring a quick and easy fix for your leak detection.

This product comes with a 100% satisfaction guarantee. Some users who purchased this product complained about receiving the wrong product.

5. FJC 9140- R134a Stop Leak w/ Red Leak Detection Dye for MVAC systems in a 3oz Self Sealing Container

Features :

  • Red Visual Dye

Additional Info :

Item Dimensions
Weight 0.4

This refrigerant leak sealant is designed to stop leaks in R22 and R134a systems and can be used in refrigeration, HVAC and automotive applications. The red dye makes it easy to see where you’ve applied the product and shows where you need to look for leaks. The product is EPA-certified and complies with CARB and OAC rules. It will not void your warranty or hurt your compressor. This product can be safely used in any system with oil or with oil and refrigerant.

It will not harm aluminum or copper lines. It is non-corrosive and can be used on copper lines. It will work on older leaks as well as new leaks.

6. Refrigerant, 134A Plus Stop Leak, 12 oz.

Features :

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

Additional Info :

Item Dimensions
Weight 0.75

ThermaPure 134a is a high-quality refrigerant that is compatible with most brands of AC units. It is also safe to use on sensitive electronic devices. The ThermaPure 134a comes in a 12-ounce can, which is enough to recharge the system on most residential AC units up to three times. It is also available in a one-gallon can.

The stop leak additive in the ThermaPure 134a can repair leaks as small as 0. 5mm, which means it is a good choice for low-pressure residential AC units. The refrigerant can is also eco-friendly.

7. Certified A/C Pro Super Seal Car Air Conditioner Refrigerant Stop Leak Kit, Repairs Metal Leaks and Seals Rubber Leaks in O Rings and Hoses, Includes Reusable Dispensing Hose, 3 Oz, InterDynamics

Features :

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

Additional Info :

Color R-134a Super Seal Stop Leak Kit
Item Dimensions
Height 9.448818888
Width 2.755905509
Length 6.299212592
Weight 0.0881849048

If you’re looking for a product that will deal with most leaks, look no further than Certified’s super seal kit. This product is designed to deal with both metal and rubber leaks by sealing them with a silicon-based liquid. It repairs refrigerant leaks, o-rings, and hoses. The kit includes a reusable dispensing hose for easy, accurate application and a 3-ounce can of super seal liquid.

It’s a great product for those who don’t want to limit their options when it comes to repairing leaks. It can deal with most common leaks, making it a versatile product that will help you save on repair costs in the long run.

8. IDQ Interdynamics EZ Chill 36oz R134A Refrigerant AC Recharge 2 Cans – Can Tap Hose with Gauge with Air Conditioning Stop Leak

Features :

  • R134a KIT – Kit contains (2) 18oz cans of R134a refrigerant with stop leak and a reusable can tap with gauge. 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.
  • STOP LEAK – The stop leak in this kit is good for sealing leaks in rubber components such as o-rings. This is a basic stop leak and can not repair more severe leaks. 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. Note, this is NOT a universal can tap and can not work on common R134a threaded products. For a truely universal can tap check out the ZeroR brand of tools and refrigerants.
  • INSTRUCTIONS – Steps on product should be followed closely. With vehicle running and AC set to Max Cool, connect can to low side service port. Dispense refrigerant into system in short bursts, checking the gauge in between dispensing for proper charging levels.
  • LEGAL – Complies with Section 612 of the EPA Clean Air Act, EPA Compliant in Self Sealing Cans. R134a Refrigerant for MVAC use in 18oz self sealing valve cans.

This is a top-rated recharge solution for air conditioning units containing R-134a refrigerant. It’s designed to be compatible with most brands of air conditioning units, including popular models from Lennox, Ruud, Goodman, Carrier, and others. More importantly, the solution is non-corrosive, meaning that it won’t damage your AC unit or the components within. This recharge solution works exceptionally well for those with leaks in their air conditioning systems.

It’s designed with a unique formula that stops leaks without the need for a solder. This makes installation quick and easy.

9. InterDynamics EZ Chill Car Air Conditioner Refrigerant Stop Leak Kit, Restores Lost Refrigerant and Stop Leaks in O Rings, Hoses and Gaskets, Includes Disposable Recharge Hose, 13 Oz

Features :

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

Additional Info :

Item Dimensions
Height 2.7
Width 2.7
Length 9.1
Weight 1
Release Date 2013-06-21T00:00:01Z

Of refrigerant, instruction manual and safety gogglesFor the best, long-lasting results, we recommend using the interdynamics ez chill kit. This option is full of features designed to produce the best results possible. It comes with a recharge hose that is designed to last up to 20,000 cycles and won’t tear or break down over time.

This hose is disposable, so you won’t have to worry about cleaning it or making sure it is properly sanitized. It comes with 13 ounces of refrigerant, which is more than enough to stop most leaks, and it can restore lost refrigerant as well.

10. ZeroR A/C Pro R134a Super Seal Stop Leak | Seals Metal & Rubber Air Conditioning Leaks | Installation Can Tap Included

Features :

  • SUPER SEAL – AC Pro made by Interdynamics IDQ seals metal leaks in condensers, evaporators, accumulators, receiver and driers. Also works on rubber parts like hoses, O-rings, gaskets.
  • CAN TAP – Comes with it’s own can tap that will not be reused. No additional tools required!
  • SAFE – Safe for all R-134A systems and Compatible with all lubricants
  • 3oz – Can size is 3oz by weight. Amount of stop leak is enough for any vehicle sized system and smaller with a small amount of R-134a used as a propellent into the system.
  • LEGAL – R134a Refrigerant for MVAC use in 3oz Self Sealing Cans.

The Zeror A/C Pro R134a is an excellent product that works to stop the leak of your air conditioning. The product is made of a special material that is compatible with the R134a refrigerant used in most vehicles. The material is pliable and can adapt to the contours of your vehicle, which allows it to stop the leak in the most efficient way possible.

The Zeror A/C Pro R134a comes with a special tool that you can use to access hard-to-reach areas and apply the sealant. Additionally, a tap is included, so you can easily access the areas that you want to seal.

Get the Best r134a stop leak

Before buying a stop leak, it is crucial to determine if your car really needs one. If your air-conditioning system isn’t blowing cold air, it may be a simple problem like a loose belt or a more complex issue, like a leak.

If you’re not sure if you need a stop leak, call a mechanic or an air-conditioning technician to have your air conditioner checked. If the problem is a leak, the stop leak will temporarily fix the issue until you can get the AC system fixed properly.

Stop Leak vs. Leak Detection Fluid
Stop leaks are typically used to seal small leaks in an air-conditioning system until the leak can be fixed.

A leak detection fluid, on the other hand, is used to determine the location of a leak. Leak detection fluids are colorless and typically evaporate quickly, so they must be applied to the suspected leak area immediately after being sprayed.

Stop Leak vs. Refrigerant Fluid
Stop leaks and refrigerant fluids are two different types of products that are used in air-conditioning systems.

Stop leaks are designed to temporarily stop a leak in an air conditioner until the leak can be permanently fixed.

Refrigerant fluids, on the other hand, are used to recharge air-conditioning systems.

Stop Leaks vs. Stop Leak Patches
Stop leak patches are not the same as stop leaks. While they are both used in air conditioners, they are used at different times and in different ways.

Stop leak patches are made with an adhesive that is used to temporarily seal small leaks until the leak can be fixed. Stop leak patches are typically used in the tire industry to temporarily seal small leaks in tires that can be fixed later.

Stop leaks, on the other hand, are used in air-conditioning systems to temporarily seal a leak until the leak can be permanently fixed.

How to Use Stop Leak
Stop leaks are typically applied by spraying or pouring the product into the air-conditioning system.

To use a stop leak spray, shake the can and then point the nozzle at a 90-degree angle toward the AC system. Then, spray the stop leak into the system until the can is empty.

To use a stop leak pour in, first, empty the AC system of as much refrigerant as possible. Then, pour the stop leak

Frequently Questions and Answers

  • What is the best stop leak for r134a?

  • Which is the best stop leak for a refrigeration system?

  • Is stop leak for r134a the same?

    No, stop leak for r134a is different than stop leak for r12. Stop leak for r134a is a permanent repair, while stop leak for r12 can be removed when r134a is no longer used. Both stop leak products are a liquid that is applied to the system to stop the leak and prevent further damage.

    Stop leak for r134a is a stronger sealant that adheres better to the system.

  • What is the best way to stop a leak in an r134a system?

  • What is the best r134a stop leak?


R-134a is a refrigerant that is being phased out in favor of newer alternatives like R-410A. If you have an A/C unit that uses R-134a, it’s a good idea to have a repair professional conduct a leak test every year or two. In the meantime, use a quick fix product like GOGREEN Stop Leak to patch any leaks until you can get the system serviced by a professional.

GOGREEN Stop Leak is a natural refrigerant oil with additives that help stop small leaks from turning into larger ones.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top