SpecSeal® Wrap Strips are highly flexible, elastomeric strips designed to firestop combustible penetrations in fire-rated floors, floor/ceilings, and walls.  Comes in convenient 12' rolls to minimize waste. Intumescent material expands rapidly to seal off penetrations quickly.  Temperatures in excess of 250° F cause the wrap strip to expand and continues to expand up to temperatures of 1000 ° F.  BLU Wrap Strip is UL® Classified for plastic pipe applications up to and including 4 hours. Meets the requirements of ASTM E814 and UL1479.  FM approved.