Introducing the new MARKRON Primer Sealer 4-Color Pack. Now completely seal and waterproof cartridge primers, shot shell primers, bullet case joints and off the shelf, unsealed, factory ammunition with the option of color marking each cartridge for instant powder load and cartridge caliber ID. The MARKRON Color Pack contains 4 bright, vivid colors in red, blue, green and black. This is not nail polish, which is prone to peeling, chipping and moisture deterioration. This is the proven original Primer Sealer formula but with unique coloration added.