Permatex 56521-6PK High Performance Thread Sealant, 50 ml (Pack of 6) Formulated specifically for metal, tapered pipe thread fittings Replaces tape and pipe dopes Prevents galling and protects mated threaded areas from rust and corrosion Cures rapidly to withstand 10,000 PSI Suggested Applications: Stainless steel fittings, head bolts into through holes, oil PSI sending units/sensors, oil and coolant lines, intake manifold switches, rear axle fill plug, fuel fittings