Products / IB-3 StormStopper Plus

IB-3 StormStopper Plus is a self-adhering, 50 mil, mineral-surfaced roofing underlayment that adds an advanced adhesive system for aggressive adhesion to the roofing substrate to the StormStopper construction of mesh bonded to rubberized asphalt, black stone granules and a non-removable selvedge edge. It installs at edges and valleys under shingles, tile and other roofing, above 40 F and on slopes of 2 inches per foot or more, and may be left exposed for up to 30 days; it ships in 36-inch by 65-foot rolls. The product page and data sheet list ASTM D1970, Florida Building Code FL 41919 and Fortified Building Program compliance. MFM gives a 5-year limited warranty.