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 degrees Fahrenheit, and 10,000 PSI on liquids from -50 to +500 degrees 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. Brush included.