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WeatherMaster sealant from Titebond is a 10 oz, cartridge-based clay polymer sealant ideal for exterior applications such as door and window sealing, siding, and trim. Its flexible and UV-resistant formula ensures a long-lasting seal against weathering, mildew, and mold. This sealant meets rigorous industry standards, including AAMA and ASTM certifications, and is suitable for LEED v4.1 projects. Its paintable finish allows for a seamless blend with surrounding surfaces. With a 1-hour full cure time, WeatherMaster sealant is perfect for professional contractors and DIYers seeking a reliable and durable sealant for exterior projects.