Rapidstick 8577 Anaerobic Thread Sealant offers immediate low pressure resistance for all metal threads on pipes, joints, and fittings, locking and sealing to resist loosening and leakage during testing, and after cure. It has WRAS approval for Potable Water, and protects against corrosion, shock and vibration. 8577 will not creep, shrink, gall, migrate, or block systems.