Premier Building Solutions XtraStop 550 is expressly designed for filling areas around wires, vents, pipes, ducts and other wall penetrations and construction voids. XtraStop 550 is a commercial quality, intumescent, non-combustible fire, smoke and draft prevention sealant. XtraStop 550 is water-based and can be used wherever ASTM E-814 specification is needed. Premier XtraStop 550 is engineered to withstand 3000 degrees for up to 8 hours and can be safely removed with soap and water prior to curing. XtraStop 550 is part of the XtraGuard Weather Defense System an integrated product line of building components developed from advanced materials research that increase the durability and comfort of residential and commercial structures by effectively managing moisture. XtraStop 550's aggressive adhesion and compatibility with all major building materials makes it a critical link in the XtraGuard Weather Defense System when combined with the company’s complete line of wraps and flashing products. Premier XtraStop 550 withstands 3000° F exposures, bonds to most substrates, is ASTM E-814 - 8 hours rated, non-combustible, water-resistant, non-toxic and non-sag.