Loctite Surface Prep Primer speeds the cure of all Loctite brand anaerobic products and ensure proper cure on inactive metals. Ideal for cure conditions below room temperature. Dries in 30-70 seconds. Mil-S-22473FC, NSF/ANSI 61, NSF P1, and CFIA tested and approved. 7649 Primer contains a copper salt chemical compound, has a mild acrylic odor and is a pre-adhesive primer.