Pre-Applied Chemial Patch, is a type of adhesive used to secure threaded fasteners, such as screws, bolts, and nuts, in place. Thread locking adhesives work by creating a strong bond between the threads of the fastener and the mating surface. This bond helps to prevent loosening caused by factors such as vibration, thermal expansion and contraction, or external forces. It also helps to seal the threads, providing some level of resistance to moisture and contaminants. We can supply screws and bolts that come with pre-applied chemical patches designed to prevent from loosening or fluids leaking.