3M™ Scotch-Weld™ Pipe Sealant Anaerobic Adhesives are one-component anaerobic sealants that cure and seal hydraulic and pneumatic pipes and fittings to withstand high temperatures and pressures. HP45 is a low breakaway torque strength, medium viscosity liquid sealant for most high pressure hydraulic and pneumatic fittings. It has excellent solvent resistanceInformation provided by 3M |