This product consists of a resilient, non-woven glass fiber mat, which is permeated and coated with SBS modified bitumen. This sheet is covered with finely divided mineral matter on its top surface while a silicone treated release film, which is easily removed during application, protects its selfadhesive backing. This product is used primarily for waterproofing purposes under shingled roofs and specifically beneath potential ice dam areas, it can also be installed around vent stacks, dormers, chimneys, and other rooftop structures.