Method of inhibiting algae growth on asphalt shingles

A - Human Necessities – 01 – N

Patent

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Details

A01N 59/20 (2006.01) A01N 25/12 (2006.01) E04D 1/16 (2006.01) E04D 13/00 (2006.01)

Patent

CA 2122080

A method of inhibiting algae growth on an asphalt shingle surface exposed to varying humidity using a blend of copper-containing algae-resistant granules and non-algae-resistant granules is presented. The copper-containing algae-resistant granules comprise a substrate granule having at least one inner ceramic coating layer comprising cuprous oxide and a seal coating having a thickness covering the inner layer and which is at time to devoid of copper.

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