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Our Shingle Shield Zinc Strips actively inhibit the growth of moss, fungi, algae, for new or existing composition roofs. Designed to be installed on a new or existing roof. It is recommended that the roof be cleaned first with our Shingle Shield Roof Cleaner to remove any existing algae, fungus, and/or moss prior to installation of zinc strips. Each pack contains 7 three foot pieces or 21 feet total.
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