Shingle Shield zinc strips are precision engineered to provide long term roof protection from fungus, moss or algae attack.
By installing one row at or near the roof ridge line, you protect the entire roof. Every time it rains, Shingle Shield goes to work releasing invisible,(but safe!) zinc oxide to inhibit the growth of fungus, moss and algae and keep it looking beautiful! . Each package contains 21 feet. Note: Roof must be cleaned using Shingle Shield Roof Cleaner before installing Shingle Shield Zinc Strips.