DAP® High Temp RTV Silicone Sealant – 300ml is a high-performance, weather-resistant sealant designed for extreme temperature applications. Withstanding intermittent heat up to 550°F, it’s ideal for sealing flue pipes, ducts, and other high-heat HVAC or industrial components. This shrink- and crack-proof formula delivers long-lasting durability and is safe for incidental food contact, making it perfect for both residential and commercial use.