All purpose PTFE thread sealing compound that produces leakproof seals on threaded connections. Lubricates, seals and protects threads in an extensive variety of plumbing, heating and oil field threaded pipe connections over a wide range of services, temperatures and pressures. Will not dry out, stain, harden or separate. Non-toxic. Will not destroy the seals of valves or faucets. Wipes clean from hands easily.