Loctite® 660 Quick Metal A single component retaining adhesive/sealant. Non-metallic, non-running anaerobic paste which only cures between active metal surfacesProduct hardens into a tough plastic which is resistant to solvents and lubricantsFills voids between parts to prevent fretting, wear, corrosion and backlashFor use on worn metal parts eg. shafts, housings, keyways, splines and bushingsLoctite Activator N7649, stock no. 108-716 is recommended to speed up cure and promote cure through large volume gaps up to 20 thou.