3M™ Scotch-Weld™ General Purpose Pipe Sealant PS65 is a white, slow-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.