Patent 11118352 was granted and assigned to Certainteed Corporation on September, 2021 by the United States Patent and Trademark Office.
A microbial growth and dust retardant roofing shingle comprising a substrate and a pore filling composition applied on the surface of the substrate is disclosed. The pore filling composition comprises a silane or acrylic composition. A method of protecting a substrate from microbial growth and soiling using the pore filling composition of the present disclosure is also disclosed.