External sealants are single component anaerobic adhesive for sealing the primer and bullet. It improves the bullet pull-out strength and approve the waterproof test according the NATO AEP-97 standard. It cures in closely fitting joints in the presence of metal and exclusion of oxygen. It has a secondary cure feature which allows the adhesive fillet on the exterior of the gap to be cured via UV light. It`s perfect for high-speed quality control inspections.