Firestop tested up to 4 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115Fire Resistance tested for static construction joint systems in accordance with ASTM E 1966 (UL 2079)Meets UL Water Leakage Test, W Rating - Class 1 requirementsCompatible for use with CPVC pipingTested in accordance with ASTM G 21 standard practice for determining resistance of synthetic polymeric materials to fungiL-rated smoke sealMinimizes noise transfer (STC-rating of 53 when tested in STC 54-rated wall assembly)Sag-resistant, halogen-free formulationApplied with conventional caulking equipment (excellent adhesion and caulk rate)Excellent weatherability during constructionRe-enterable/repairableLight grey colour with black flecks, no mixing required