Rust-Oleum Non-Sag Silicone Sealant is a high-performance, 100% silicone, moisture-curing sealant designed for sealing and repairing roofs, masonry, architectural metal, and metal roof seams, fasteners, penetrations, and terminations. Its non-sag, non-shrinking formula delivers excellent adhesion to a wide range of building materials while providing outstanding UV and weather resistance without cracking or chalking. Ideal for vertical and horizontal applications, crack repairs, and control joints, it offers superior tensile strength and long-lasting flexibility for durable, weatherproof sealing.