A point of use penetrant for use by mechanics and DIY. Used for disassembly of corroded pipe joints, rusted bolts and machinery, and painted or gummed up metal mechanisms. Also used to clean typewriters, guns, and sports equipment. Spray or squirt product on frozen joint or part. Tap the joint to set up vibrations. If part is stubborn, repeat application and allow to soak into joint for a few minutes. 4 oz. size.