Seals the primer-to-primer-pocket joint to produce a tough, waterproof barrier that keeps moisture out of your bullet's powder to help prevent misfires. Fast drying, easy to apply to any loaded ammunition. Greatly extends the storage life of your cartridges, even under adverse, highhumidity conditions. Withstands up to 30 days of total water submersion. The A 1/2 oz. bottle contains enough sealer to treat approximately 1,000 rounds. Won't affect muzzle pressure, velocity, or accuracy. Comes with instructions and applicator. Mfg: Roboco Laboratories