3M™ Copper Roofing Granules are the key ingredient used in shingles featuring Scotchgard™ Protector to help protect shingles against black streaks caused by algae for up to 20 years! By capitalizing on our high quality granules and innovative thinking, manufacturers are able to use a mixture of both copper and classic granules to create a premium asphalt shingle that fights black streaks caused by algae. This innovative design helps maintain your roofs clean appearance and preserve its beauty for years to come. So go ahead, admire your beautiful new roof with shingles featuring Scotchgard Protector.
3M™ Copper Roofing Granules provide long-lasting, weather-resistant protection that help defend against algae growth that causes ugly black streaks. 3M's science-based mineral innovations and long expertise in mining has created a unique environment to produce specialty granules with a variety of features. For example, here's how our copper containing granules work: