Advanced Silicone 2 window and door sealant is a high-performance, 100% silicone and 100% weatherproof sealant formulated to protect areas susceptible to harsh weather. These areas include windows, doors, siding, trim, molding, baseboards, vents, basements, attics and around wires and pipes. Its 30 min rain-ready formula offers 40% more flexibility than Class 25 sealants and is 5x stronger than Silicone 1 sealant. In addition, it has 10 year mold-free product protection to help resist mold and mildew growth. Backed by a lifetime guarantee.10 year mold-free product protection40% more flexibility than Class 25 sealants30 min rain-readyResists UV degradationLifetime guaranteeNeutral curing with low odor