A high-performance sealant designed especially for HVAC applications. It provides a long-lasting weather resistant seal with supreme adhesion, flexibility, and durability. It adheres to most common building materials and remains flexible from - 40°C to 246°C. Meets Fed. Spec. TTS001543A, ASTM C920, FDA Reg. No. 21 CFR 177.2600, and NSF/ANSI Standard 51. Safe for incidental food contact and is for interior/exterior use.