One of our most requested products, Enviro-Safe ProSeal Xl4 Inject is a small, concentrated, easy inject refrigerant leak sealant. This product is currently available in two sizes: Fractional-1.5 ton system and 1.5- 5 ton system. ProSeal XL4 Inject is compatible with all refrigerants except ammonia. This product performs best in heat pumps, split and mini- split units, packaged units, microchannel coils, coolers, and commercial units. Enviro-Safe has been producing and packaging sealants for over 17 years. Our Sealant Injector hose was designed and tested during 20132014 and has been produced and marketed under private label since the fall of 2014. Unlike most other products on the market, ProSeal XL4 travels with the gas, which makes it faster, and more effec- tive at finding leaks. ProSeal XL4 Inject will seal most leaks when used according to the manufacturers instructions and will seal most small holes located in the AC condenser, evaporator, fittings, and metal line sets. Sealing leaks will save energy and lower refrigerant emissions.