Oil tolerant high strength red thread locker is designed for the permanent locking and sealing of threaded fasteners. Loctite 263 is particularly suited for heavy-duty applications such as studs into motor housings, nuts onto studs in pump housings, and other fasteners where high strength is required. Loctite 263 provides robust curing performance.

It not only works on active metals (e.g. brass, copper) but also on passive substrates such as stainless steel and plated surfaces. The product offers high-temperature performance and oil tolerance. It tolerates minor surface contaminations from various oils, such as cutting, lubrication, anti-corrosion, and protection fluids.