Unique Can-within-a-Can technology provides the hardener right inside the can. No more measuring & mixing. Just release the hardener and shake. Provides protection against rust and corrosion, plus excellent uv protection. Can be applied to all types of metal, plastic, and wood. Can be applied over bare metal, Parkerizing, anodizing, and bluing. Remains useable for up to 48 hours once activated. Enough for 2-4 firearms. No baking or preheating required. Adjustable nozzle for vertical or horizontal spray. Mfg: Lauer Custom Weaponry