We are a company founded and actively managed by HVAC technicians. Our goal is to bring you the best Leak Sealants and tools that we use ourselves on our daily jobs. We have literally tried everything! These are the products we stand behind 100%. Tried and True Refrigerant Leak Repair There has been a lot of confusion about refrigerant leak sealants and we want to set the record straight. Our product is a true refrigerant leak sealant that has been developed and refined over 18 years. With over 2 million units sold in the Direct Inject format since 2015 (almost all to HVAC professionals), we stand 100% behind the effectiveness of our product. However, we won't stop here. We strive to continually make our products better and better! Two Million Successful Seals Made and used by HVAC professionals, seal small refrigerant leaks with a proven method for systems up to 5 tons and prevent future leaks. With 2 million successful applications, it’s also safe for all air conditioner and refrigeration systems, valves and tools and compatible with all types of refrigerants and oils (except ammonia). Now You Can Inject Easily and Directly Get rid of all of the hassles of typical sealants with this patent pending direct injection method. No more pump downs, fussy syringes, or pressure-sensitive cans needed, simply charge it in. The Leak Saver will typically seal small leaks where the refrigerant charge is not completely lost in 72 hours. It can also be used in multiples for systems larger than 5 Tons. Can Seal Refrigerant Leaks For Good! Super concentrated, it works with all types of refrigerant except ammonia (including Freon 410A, R22, 404A, 134A, etc.) and was made to travel with the gas to seal leaks faster. Can be used safely with manifold gauges, expansion valves, and capillary tubes.