Flame retardant modified asphalt-based material and products therefrom

A method of preparing a flame retardant product comprising the steps of:

• forming a composition and processing said composition into the product;
• said step of forming including mixing from about 40 to about 50 parts by weight of asphalt;
• from about 10 to about 20 parts by weight of a copolymer selected from the group consisting of atactic propylene/ethylene copolymer, atactic polypropylene, thermoplastic polyolefin, high density polyethylene, polymethyl pentene, and mixtures thereof;
• from 0 to about 5 parts by weight of polypropylene homopolymer having at least about 45 percent by weight of crystallinity;
• from about 10 to about 40 parts by weight of a functional filler having a decomposition temperature above the processing temperature of the material;
• from about 0 to about 15 parts by weight of a non-functional filler;
• and, from about 0.5 to about 10 parts by weight of an intumescent material.