10 Best Refrigerant Leak Sealer of December 2025

• 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).
• THE EASIEST INJECTION METHOD: Patent-pending and made to be completely fuss-free, no pump downs, syringes, or pressure-sensitive cans needed again!
• 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).

Leak Saver

• 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 R22, 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.

RED TEK

• 2-Ounce Syringe Treats Up to 6 Ton Units
• 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

TSI Supercool

• Concentrated
• No Pump Down
• For use in heat pumps, split and mini split systems, packaged units, and micro-channel coils
• Two sizes available 0-1.5 Ton, 1.5-5 Ton
• Compatible with all refrigerants, except ammonia

ENVIRO-SAFE

• GET YOUR A/C BACK UP AND RUNNING: Help prevent system failure, preserve efficiency and eliminate corrosion by converting system moisture into synthetic oil.
• FOR MOST AIR-CONDITIONING SYSTEMS: Use on mini-split units, heat pumps, packaged units, central A/Cs, coolers, microchannel coils, and automotive applications.
• THE FASTER, MORE ECONOMICAL CHOICE: By converting moisture into synthetic oil, it mixes with the already existing oil, for a simpler process than vacuum pumping.
• THE PERFECT PREP FOR LEAK REPAIRS: Use alone to dry your air-conditioning system or pair with our Leak Saver Direct Inject (our refrigerant leak sealer) for leaks.
• 100% SATISFACTION GUARANTEE: If for any reason this didn’t work out and you’re unsatisfied, contact us for another at no cost (must be installed by certified HVAC techs).

Leak Saver

• Concentrated formula means less material in system
• Clear tube so you can see the sealant go in
• No need to pump down R-410A units
• Perfect for split systems, heat pumps, microchannel coils, packaged units, and mini splits
• One time use
• Leak Sealant

Nu Calgon

• 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

Rectorseal

• Concentrated formula means less material in system
• Clear tube so you can see the sealant go in
• No need to pump down R-410A units
• Perfect for split systems, heat pumps, microchannel coils, packaged units, and mini splits
• One time use
• Packaging may vary

Nu Calgon

• 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.

Leak Saver

• Manufacturer model # 947KIT
• Genuine Replacement Part
• cliplight Manufacturing Part
• Manufacturer model # 947KIT
• Genuine Replacement Part
• Air Kontrol item

Cliplight Manufacturing