OVERVIEW
3M™ Thread Sealant 4291 may be a water-based product designed to be pre-applied to threaded fasteners, providing excellent resistance to automotive fluids and withstanding high temperatures and pressures. Typical applications are threaded fasteners for the engine compartment.
HOW IT WORKS
3M™ Thread Sealant 4291 is dry to the touch on arrival and prepared for immediate assembly. During fastener installation, 4291 acts as a partial lubricant, reducing torque tension variation and preventing the galling of metals. 4291 doesn’t harden or cure, allowing fasteners to be adjusted, removed, and replaced, if needed, during the lifetime of the part.