Top pick primers, oil tolerant removable medium strength blue thread locker is designed for the locking and sealing of threaded fasteners between 1/4 inch and 3/4 inch (6 to 20 mm). It not only works on active metals (e.g. brass, copper) but also on passive substrates such as stainless steel and plated surfaces. It tolerates minor surface contaminations from various oils, such as cutting, lubrication, anti-corrosion, and protection fluids.

A thread-locking fluid or thread locker is a thin, single-component adhesive, applied to the threads of fasteners such as screws and bolts to prevent loosening, leakage, and corrosion.