Better Bubble is an advanced leak locator that can detect refrigerant gas air oxygen and most other gas leaks. Better Bubble leak locator pinpoints the smallest natural gas LPG & A/C refrigerant leaks quickly and easily. Can be used at varied temperatures and pressure conditions. Easy to spray or apply and is formulated to be used on pipe tubing tanks pressure vessels condensor and evaporator coil and refrigerant coil. Better Bubble leak locator; Biodegradable. Contains no oils halogens ammonia or amines. Will not corrode metal surfaces or attack plastic or rubber. Not reactive with refrigerant oils. NOT to be used on CPVC.