F-L CHILL ZONE 17oz 6/csA special refrigerant propellant freezes metal to as low as 50F 45C causing contraction of the metal and creating micro cracks in the corrosion and galvanically fused metal parts to free them A penetrating release agent breaks down and flushes out the rust after the metal contracts and breaks loose For best results spray the seized part for 10 20 seconds or more depending on severity then let sit for several minutes