Permatex Pneumatic/Hydraulic Thread Sealant Prevents Leakage From Vibration, Temperature Cycling & Extreme Pressure. Protects Against Rust, Corrosion And Galling Of Threads. Uses: Hydraulic And Pneumatic Fittings, Fine-Filtration Systems, Servomechanisms. Permatex, Made For The Professional. Made In U.S.A. & Oem Specified. Non-Fouling. Protects Against Rust, Corrosion & Galling Of Threads.