Thread Lockers

Threadlockers from Loctite, Permatex and Devcon in liquid and gel, in removable medium strength and high strength, in 0.18 to 1.22 oz. Strength is a disassembly decision, not a quality one — medium strength holds against vibration and still comes apart with hand tools, and high strength generally needs heat to break, so it belongs only on a fastener you do not expect to service. These are anaerobic adhesives: they cure in the absence of air between engaged threads, which means they need clean, oil-free threads and will not cure in the bottle or on an open surface. Gel stays where you put it on an overhead or vertical fastener where a liquid runs off. On a stainless or plated fastener, cure is slower and a primer may be needed.