IB-3™ StormStopper is a self-adhering, 50 mil, mineral surface roofing underlayment for use under shingles, tile, and other types of roofing. It is constructed from a strong layer of mesh bonded to rubberized asphalt and coated with black stone granules. Comes with a non-removable selvedge edge for a secure seal on overlaps.

IB-3™ StormStopper installs under roofing at the edges and valleys to protect from leaks due to ice dams, melting snow and blowing rain. IB-3™ StormStopper is suitable for use in new construction and reroofing.

IB-3™ StormStopper Features

50 mil nominal thickness
Non-removable selvedge edge for secure seal on overlaps
Installs in temperatures above 40°F
Minimum slope for installation is 2" per foot
Applies easily at eaves, valleys, vents, skylights and chimneys
Easy to remove split release liner for fast installation and ideal for valley applications
Self-seals around common fasteners
May be left exposed for up to 30 days
5-Year limited warranty