Loctite 243 Primerless Threadlocker is an oil tolerant, removable, medium strength, blue threadlocker designed for the locking and sealing of threaded fasteners between 1/4" and 3/4" (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.

• Upgraded temperature resistance - up to 360 Degrees F
• Oil tolerant curing on as-received fasteners without cleaning
• Primerless performance on both inactive and active metals