10 Best Ac Leak Sealers 2021

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

Leak Saver: Direct Inject – ⭐ Best Overall Ac Leak Sealer

LS-05 by Leak Saver

  • Weight: 0.2 pounds
  • Dimensions: 6.5 x 9.6 x 0.6 inches
Leak Saver: Direct Inject
  • THE EASIEST INJECTION METHOD: Patent-pending and made to be completely fuss-free, no pump downs, syringes, or pressure-sensitive cans needed again! Comes with 1/4" male and female connections. A 134A quick coupler is necessary for automotive systems. A 5/16" to 1/4" adapter may be necessary for 410A mini-splits.
  • TAKE A LOOK AT THE NUMBERS: Two million applications and counting, you can confidently seal small refrigerant leaks with a proven leak sealer (systems up to 5 tons).
  • A PERMANENT FIX FOR LEAKS: Super concentrated and made to work with all types of refrigerants, it’s compatible with all types of refrigerants and oils (except ammonia).
  • 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.
  • 100% SATISFACTION GUARANTEE: 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).

Red Angel A/C Stop Leak & Conditioner

00222 by BlueDevil Products

  • Release date: 09/12/2014
  • Weight: 0.28 pounds
Red Angel A/C Stop Leak & Conditioner
  • Guaranteed Permanent Seal
  • Will Not Clog or Damage the A/C System or Recovery Unit
  • Compatible with R-134a

Rectorseal 45322 Freeze Leak Repair

45322 by Rectorseal

  • Weight: 0.39 pounds
  • Dimensions: 8 x 1 x 10 inches
Rectorseal 45322 Freeze Leak Repair
  • AC leak freeze permanently seals leaks in air conditioning and refrigeration systems
  • Will continue to seal additional leaks for up to 1 year that meet testing specifications
  • Does not contain polymers & oem approved
  • Tested to be non-clogging to a/C compressor and recovery unit
  • Ideal for preventive maintenance and leak protection
  • This is an aftermarket of generic part

AC Pro Car Air Conditioner R134A Refrigerant Stop Leak Kit

MRL-3 by Interdynamics

  • Color: R-134a Super Seal Stop Leak Kit
  • Weight: 0.22 pounds
  • Dimensions: 3 x 6 x 9.8 inches
  • Warranty: Products are warranted to be free from defects in material and workmanship under normal use and service for a period of one 90 days from the date of purchase, unless otherwise specified on the product packaging. This warranty shall not apply to any altere
AC Pro Car Air Conditioner R134A Refrigerant Stop Leak Kit
  • 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

Leak Saver: Direct Inject UV

LS-05UV by Leak Saver

  • Weight: 100 pounds
  • Dimensions: 6.5 x 0.6 x 9.5 inches
Leak Saver: Direct Inject UV
  • Permanently seals refrigerant leaks and prevents future leaks; use with systems up to 5 tons.
  • Safe for all air conditioner and refrigeration systems, valves, and tools. Compatible with all types of refrigerants and oils.
  • Injects easily and directly. No more pump downs, fussy syringes, or pressure sensitive cans; UV dye can detect large leaks requiring repair.
  • Designed and used by HVAC professionals, our formula has been proven through over a decade of research.
  • Proudly made in the USA.

BlueDevil Products Red Angel A/C Stop Leak – 💲 Best Budget Ac Leak Sealer

49496 by BlueDevil Products

  • Release date: 10/03/2014
  • Weight: 0.11 pounds
BlueDevil Products Red Angel A/C Stop Leak
  • 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

Cliplight Super Seal Advanced 944KIT

944KIT by Cliplight

  • Dimensions: 6.2 x 2.5 x 6.2 inches
Cliplight Super Seal Advanced 944KIT
  • Suitable for use with R-410a

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

402 by RED TEK

  • Weight: 0.42 pounds
  • Dimensions: 11 x 8 x 7 inches
RED TEK ProSeal12 A/C Seal Treatment (4 oz. can)
  • Operation: Easy to use. Installs in minutes. Remains in system as a liquid lubricant ready to seal any future leaks.
  • Lower Cost: Less expensive than replacing leaking evaporators, condensers, compressors, and metal lines.
  • 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.
  • Environment: Helps environment by reducing refrigerant emissions.
  • Safety: Safe and easy to use. Less toxic than other seal treatments that contain poisonous methanol. No long term health risks have been attributed to RED TEK ProSeal.

Mr. Freeze Car AC Recharge Kit and Leak Sealer with

533505C by Mr. Freeze

  • Weight: 1.57 pounds
  • Dimensions: 6 x 3 x 11 inches
Mr. Freeze Car AC Recharge Kit and Leak Sealer with
  • 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. Manufactured in the USA.
  • 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.
  • THE MR FREEZE DIFFERENCE - Mr. 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. Simply fill your system until you reach the target temperature using our easy to follow how-to instructions.
  • 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.
  • 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. Color may differ from picture.

Rectorseal 45302 Freeze Leak Repair – 👑 Premium Pick

45302 by Rectorseal

  • Color: Red
  • Weight: 0 pounds
  • Dimensions: 8 x 1 x 10 inches
Rectorseal 45302 Freeze Leak Repair
  • AC leak freeze permanently seals leaks in air conditioning and refrigeration systems
  • Will continue to seal additional leaks for up to 1 year that meet testing specifications
  • Does not contain polymers
  • Tested to be non-clogging to a/C compressor and recovery unit
  • Ideal for preventive maintenance and leak protection
  • This is an aftermarket of generic part

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