Provides watertight seal for water-pipe fitting and installation work. Helps prevent bi-metal corrosion in threaded joints. Lubricates threaded joints during assembly and helps prevent bi-metal corrosion. Suitable for cast iron steel alloys plastic brass and ceramics. Length 12m. WRAS approval for use with drinking water. Complies with BS 6920-1:2000 and BS 7786:2006.