Loctite 243 Thread Adhesive Loctite "243" Thread Adhesive is designed for locking and sealing of threaded fasteners, which require normal disassembly with standard hand tools. This adhesive operates the same as Loctite 222, but has a higher hold strength. Suitable for less substrate such as stainless steel and plated surfaces. Resists migration after application (strength medium). 10 ml bottle.