PENOSIL Butyl Sealant 444 is a weatherproof and durable butyl mastic for various exterior sealing works. Specially designed for weatherproofing and sealing exterior joints where a permanent plastic connection is required. Adheres well to most common construction materials such as wood, concrete, metal, PVC and glass. Deliver 2-4 Days Non Stock Item Datasheet Manufacturers Website Check Limitations of use before purchase