DAP Auto/Marine Sealant is a high-performance, single-component sealant made from 100% RTV silicone rubber, that is designed for automotive and marine maintenance and other repair tasks. Versatile sealant forms a durable, 100% waterproof seal that withstands saltwater, endures sunlight, and remains flexible and resilient, even in challenging conditions. It effectively resists cracking, shrinking, vibration, and the stresses of expansion and contraction.