ASPHALTIC SHEET MATERIALS INCLUDING EXPANDABLE GRAPHITE

摘要

An asphaltic sheet comprising an asphaltic component including an asphalt binder and expandable graphite and optionally a polymer modifier complementary flame retardant dispersed within the asphalt binder. These sheet materials are useful as roofing underlayment as roofing membranes and as barrier materials such as air vapor and/or moisture barriers modifier complementary flame retardant dispersed within the asphalt binder.