KASTAR 978 Professional Fire Rated Sealant – Neutral Adhesive Sealer
High-performance fire-rated sealant with UL certification, designed for critical firestop applications. Neutral-cure silicone formula ensures zero corrosion on metals and substrates, ideal for HVAC, electrical penetrations, and construction joints. Exceptional intumescent properties expand under heat, creating a durable char barrier to block flames and smoke. ASTM E814 and UL 1479 compliant for up to 4-hour fire resistance. Premium adhesion on concrete, steel, drywall, and plastics. UV-resistant and flexible (-40°F to 400°F) for indoor/outdoor use. Low VOC, non-sag viscosity for vertical/horizontal application. Perfect for commercial buildings, industrial plants, and residential fireproofing. Bulk pricing available for contractors and wholesalers. Global shipping, factory-direct savings.