Superior Pro-Excel 100% Silicone Natural caulk is a professional formula with exceptional workability, flexural strength and resistance to a broad spectrum of fungal, algal and bacterial growth. For both interior and exterior applications, our caulk is smooth and workable with premium adhesion, non-sag, non-stain and non-yellowing qualities. Caulk can be submerged in water within 24 hours of application. Ensure your installation lasts for years with Superior Pro-Excel 100% Silicone caulk that resists UV light, stain, mold and mildew damage. For full product details, view the product data sheet.