3M™ Copper Roofing Granules are used in shingles featuring Scotchgard™ Protector to help prevent black streaks caused by algae for the life of the roof.
Decades of 3M science has led to creating a solution that can help prevent the black streaks before they start on your asphalt shingles. 3M™ Copper Roofing Granules provide durable protection that helps defend against black streaks caused by algae growth.
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