3M™ Scotch-Weld™ Stainless Steel High Temperature Pipe Sealant PS67 is an off-white, fast-curing, paste pipe sealant. Offering high-temperature resistance up to 400ºF (204ºC), this sealant provides a strong, tough seal that can be easily disassembled. We also formulated this high temperature pipe sealant to resist pressure and vibration for long-lasting durability.