Lubricates and seals all threaded joints. White, non-hardening, non-separating, non-toxic paste. Withstands up to 3,000 PSI on gases from -50 to +400° Fahrenheit, and 10,000 PSI on liquids from -50 to +500° Fahrenheit. For use with water, steam, natural and LP gas, oil, caustics or dilute acid lines of PVC, CPVC, ABS, Cycolac, Polypropylene, iron, steel, or copper. NSF and IAPMO listed.