Soudal 435407 Acryrub Firestop Intumescent Latex, Orange Acryrub Firestop is a one-part acrylic latex caulk designed for sealing around through penetrations in fire-rated wall and floor assemblies to return those assemblies to their fire-rating. Features In case of fire, forms a flexible shield preventing the spread of fire, smoke and toxic gases through construction openings Remains flexible when cured Excellent adhesion properties Easy clean-up with water Service Temp: -20 -185 degrees F USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.