66526, Fire Stop Mastic Spray

66526, Fire Stop Mastic Spray – Firestop Sealant for Electrical and Construction Applications The 66526 Fire Stop Mastic Spray by RectorSeal is a firestop sealant designed to provide an elastomeric membrane seal suitable for dynamic movement in construction joints and through-penetrations. This product is ideal for use in electrical distribution and lighting solutions where firestopping of cable trays, HVAC ductwork, and wall systems is required. It offers a fast and economical installation method for long joint runs, making it a practical choice for electrical distributors and switchgear suppliers requiring reliable firestop solutions. Specifications Manufacturer: RectorSeal Manufacturer Part #: 66526 Product Weight: 55.0000 lbs Color: White UL Classified: Up to 4 hours STC Rating: 65 Tested to ASTM E814 (UL 1479) & ASTM E1966 (UL 2079) Shelf Life: 3 years UPC: 021449665261 Features Extremely flexible and suitable for dynamic movement Excellent freeze-thaw resistance Mastic spray application provides fast, economical installation Mold inhibitor tested to ASTM G21 Suitable for construction joints including top of wall, curtain wall perimeter, expansion, and control joints Recommended for use on cable trays, HVAC ductwork, and deflection track wall systems Downloads & Links Warranty Catalog