3M Scotch-Weld TL43 is a versatile thixotropic, anaerobic blue threadlocker with medium to high strength. Prevents the spontaneous loosening of threaded connections due to vibrations and seals the joint. Prevents joint rusting. Adheres even to slightly greasy metals, but achieves the best results with clean surfaces. Cures only in the absence of air and the presence of active metal ions.