Emzone Gravel Guard Undercoating is a tough, flexible, textured black coating that provides protection against road abrasion and weathering. It is paintable and offers excellent adhesion to metals and plastics. Offers superior protection against rust, corrosion, moisture and abrasion and quickly dries to a flexible, textured surface. It is professionally formulated to be tough, durable and long-lasting and reduces road noises and vibrations. The emzone Gravel Guard Undercoating is ideal for rocker panels, wheel wells, and underbody and is silicone free.