Our Top 15 Recommendations:
Best Automotive Ac Stop Leak Reviews:
SaleBestseller No. 1 
InterDynamics Car Air Conditioner Refrigerant Stop Leak Kit, Certified A/C Pro Leak Stop Kit for R134A Car Air Conditioners, 3 Oz Each
- 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
SaleBestseller No. 2 
Red Angel 49496 A/C Stop Leak - 2 Ounce
- 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
Bestseller No. 3 
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
- 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
SaleBestseller No. 4 
BlueDevil Products Red Angel 00222 A/C Stop Leak & Conditioner - 4.5 Ounce
- Guaranteed Permanent Seal
- Will Not Clog or Damage the A/C System or Recovery Unit
- Compatible with R-134a
Bestseller No. 5 
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
- The Easiest Injection Method: No more fussing with messy syringes, hoses, or pressurized cans. 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. Note: for automotive systems, you will still need the standard 134A to 1/4” charging adapter. Mini-splits may require a 5/16” to 1/4” charging adapter.
- 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. It’s similar to how blood in your body reacts to a cut. When a leak occurs, the Leak Saver reacts with the air and moisture at the leak site to permanently seal the leak. When used for preventative maintenance, the active ingredient circulates safely in the system to seal future leaks.
- 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.
- Compatible With All Systems and Refrigerants: Use Leak Saver on the following systems: central AC, mini split AC, cassette AC, car, refrigerated truck, home refrigerator, commercial refrigerator, boat, rv, ice machine, refrigeration racks, chillers, refrigeration condenser, cold rooms, and more. It also works with all refrigerants including R410A Freon, R22 and replacements, R134A, R1234yf, R404A, R290, R600a, and more.
- The Product We Trust: Our company is owned and operated by HVAC technicians. These are the same products we use in our own jobs, and stand behind them 100%.
SaleBestseller No. 6 
Certified A/C Pro Car Air Conditioner Stop Leak Detector Kit, Leak Detection Kit Detects O Ring and Hose Leaks, Includes Protective Glasses and Pen Light, InterDynamics
- High-intensity true ultraviolet leak detection pen light
- AAA batteries included
- Works with all types of UV leak detection dye
- Includes yellow tinted protective glasses
- Professional grade
SaleBestseller No. 7 
ComStar A/C Zero-Leak, Permanent"Stop Leak" for A/C Systems, Seals Leaks Instantly, Non-Hardening, Polymer-Free, Eco-Friendly, Made in USA, 4 Ounces (90-700)
- Is a specially developed product for preventing minor leaks in evaporators, condensers, gaskets, and seals
- Environmentally safe & suitable for use in automotive, commercial, and residential A/C applications
- Designed to not harm A/C systems with non-hardening, polymer-free characteristics
- Compatible with POE-based, PAG-based, and mineral-oil-based mobile AC lubricants
- Used for preventive maintenance and left in an operating system
SaleBestseller No. 8 
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
- 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
Bestseller No. 9 
ACDelco GM Original Equipment 10-108 Cooling System Sealing Tabs - 4 g (Pack of 5)
- Engineered for use on a variety of engine components - effective on: oil pan, ladder frame, front and rear covers, t-joints, manifold corners, intake, manifold end seals, and cam covers
- Designed for quick and easy application, assembly may be filled with oil or coolant immediately after applying sealant and torqueing the bolts
- High viscosity product that cures when exposed to air
Bestseller No. 10 
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 USA - 6ct
- The Easiest Injection Method: No more fussing with messy syringes, hoses, or pressurized cans. 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. Note: for automotive systems, you will still need the standard 134A to 1/4” charging adapter. Mini-splits may require a 5/16” to 1/4” charging adapter.
- 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!
- 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. It works similarly to how blood in your body reacts to a cut. When a leak occurs, the Leak Saver reacts with the air and moisture at the leak site to permanently seal the leak. When used for preventative maintenance, the active ingredient circulates safely in the system to seal future leaks.
- Works With All Systems and Refrigerants: Compatible with all systems, refrigerants (except ammonia), and oils. Use it on the following systems: central AC, mini split AC, cassette AC, car, refrigerated truck, home refrigerator, commercial refrigerator, boat, rv, ice machine, refrigeration racks, chillers, refrigeration condenser, cold rooms, and more. It also works with all refrigerants including R410A Freon, R22 and replacements, R134A, R1234yf, R404A, R290, R600a, and more.
- The Product We Trust: Our company is owned and operated by HVAC technicians. These are the same products we use in our own jobs, and stand behind them 100%.
Bestseller No. 11 
Leak Saver - Leak Shot HVAC - Leak Sealant Injector and Condensate Line Blaster - Non-Contaminating CO2 Cartridges - for A/C and Mini Splits - Systems Up to 5 Tons
- REPAIR BOTH CLOGS AND LEAKS: Now you can inject Leak Saver Direct Inject sealants (SEALANT SOLD SEPARATELY) and unclog air conditioner and refrigeration condensate drain lines with the same tool.
- KIT INCLUDES: Leak Shot Injection Gun, 3x Leak Shot Refrigerant Grade CO2 Cartridges (multiple shots per cartridge), 3/4” Rubber Condensate Line Adapter, 1/2” Rubber Condensate Line Adapter, Flexible Extension Hose.
- NON-CONTAMINATING CO2 CARTRIDGES: Our cartridges are specially formulated to not contaminate HVAC and refrigeration systems. Please only refill with our Leak Shot CO2 Refrigerant Grade refills.
- MADE BY HVAC PROFESSIONALS: Our company was founded and run by EPA card holding HVAC techs. We are bringing you the same products we use in our own jobs. Made in the USA.
- 100% SATISFACTION GUARANTEE: We stand behind the quality and effectiveness of our products 100%. If for any reason you are not satisfied, please contact Leak Saver directly and we will make it right.
Bestseller No. 12 
Leak Saver UV Dye (Dye Only, No Sealant) UV Refrigerant Leak Detection Dye for Automotive, Home, Commercial - Marine AC and Refrigeration up to 5 Tons
- Find Leaks Quickly and Easily: No more messy caulk guns, syringes, or cans. The Leak Shot Dye Inject system is the easiest and fastest way to inject UV leak detection dye into your automotive, HVAC, central A/C, and refrigeration cooling systems. Use a manifold gauge or our Leak Shot injector to quickly inject it into your system, run it on maximum cooling for 30-60 minutes, and then use a UV light to find the leak.
- Easy-to-See Ultra Bright UV Dye: The UV dye lights up brightly at the leak site when illuminated with the 51 LED UV flashlight. When using the UV LED light, please always wear UV Safety Glasses.
- Compatible With All Types of Systems: The Leak Saver UV Dye is compatible with all mineral, PAG, and POE oils. It is also compatible with all refrigerants, including R134A, r1234yf, R410A, and R22. Use this product in cars, trucks, RVs, boats, home central A/Cs, ductless mini-splits (5/16” adapter may be required), refrigerators, walk-in coolers, ice machines, chillers, and any refrigerant cooling system.
- You Can Count On Us: The numbers don’t lie. We’ve sold more than 3 million units of the Leak Saver sealant formula since 2015, and our products are used in the field every day by HVAC professionals.
- The Product We Trust: Our company is owned and operated by HVAC technicians. These are the same products we use in our own jobs, and stand behind them 100%.
Bestseller No. 13 
TSI Supercool 28399 HVAC Leak Stop Syringe with Application Hose, 2 fl. oz. (60 mL)
- 2-Ounce Syringe Treats Up to 6 Ton Units.Fit Type: Universal Fit
- Permanently Seals Leaks in A/C and Refrigeration Systems
- Does Not Contain Polymers, Will Not Harm A/C System Or Components
- Additive Package Protects Against Future Corrosion
- Compatible with All Lubricants and Refrigerants
Bestseller No. 14 
InterDynamics A/C Pro ACP-102 Ultra Synthetic A/C Recharge R-134a Car Refrigerant - 12 OZ
- Replaces lost R-134a refrigerant and oil in automotive A/C system
- System safe stop leak sealer stops most common A/C leaks with hoses, gaskets and O-Rings
- Special anti-wear additives extend system life and improve performance
- 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
Bestseller No. 15 
A/C Pro Super Seal AC Stop Leak Kit with Dispensing Hose - 3 OZ
- One A/C Pro Super Seal AC Stop Leak Kit includes a 3 oz can containing 1.5 oz of R-134a and 1.5 oz of additives, plus a dispensing hose
- AC Seal kit has everything you need to fix current leaks and prevent future leaks in car air conditioners
- AC seal kit includes a reusable dispensing hose designed to work only with R-134a cans with self-sealing valve tops
- Repairs metal leaks in evaporators, condensers, compressors, accumulators and receiver dryers
- Seals common AC leaks in rubber hoses, gaskets and O-rings
Last update on 2023-01-12 / Affiliate links / Images from Amazon Product Advertising API