RectorSeal firestop sealant prevents the spread of fire, smoke, hot gasses, and water. Used for construction joints and through penetrations. Can also be used on metal, insulated pipe, fiberglass, plastic pipe, wall joint, power, telephone, and datacomm cables. Water based, non-sag caulking, grade heat resistant sealant that is easy to apply as well as retrofit. Cures to an elastomeric seal that is suitable where dynamic movement is expected. Can be applied from a tube, sausage pack, or pail. Applied with a conventional caulking gun, bulk loading gun, or can be troweled from the pail. All systems rated for up to 4 hours as per ASTM E814 (UL1479) and ASTM E1966 (UL 2079) test standards. For temperature applications of 120 degrees fahrenheit, providing flexible barrier protection. For interior use and paintable, with excellent freeze-thaw capability. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.