Super high viscosity Castle(R) Pure Silicone Spray contains 99.1% pure silicone. This is a universal spray lubricant is excellent for solving problems of sticking, binding, squeaking, and lubrication. Pure Silicone(TM) extends the life of rubber weather stripping on doors, windows, hoods, and trunk lids. When applied prior to freezing winter temperatures, it will help prevent freeze-up. It protects metal from rust and corrosion, and effectively dries moisture from wet parts such as switches, relays, distributors, plugs, and chain drives. Pure Silicone(TM) also waterproofs boots and shoes, and will not stain. It contains no grease fillers, and is an excellent release agent for heat seal equipment.