GE Silicone 2+ 10.1-oz Gray Silicone Caulk

From the #1 Silicone Brand, Metal Silicone 2 sealant is a high-performance, 100% silicone and 100% waterproof sealant ideal for a range of metal projects. Common uses include repairing and sealing sheds, siding, gutters, recreational vehicle parts, roofs and vents. This 30-minute rain-ready formula is metallic gray in color and offers excellent adhesion and permanent flexibility with 10-year mold-free product protection to help resist mold and mildew growth. Backed by a lifetime guarantee.