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. Brush included.