Algae resistant shingles featuring Scotchgard™ Protector integrates 3M™ Copper Roofing Granules to prevent black streaks. Our scientists found that copper is highly effective at preventing the growth of black streaks caused by algae. The copper in our roofing granules slowly releases into dew on roofs over time to help prevent black streaks and keep your roof looking beautiful.
3M pioneered the science of algae protection. The result is protection against black streaks – and your home’s beauty – that last for the life of your roof. For more than 60 years, the Scotchgard Protector brand has kept everything from clothing and outdoor gear to carpets and cars looking better longer. It’s also the proven solution for preserving the beauty of roofs.
Minimum of 10% blend of copper-containing granules in every shingle.
Uniform copper granule distribution across the shingle surface and hip and ridge.
Third party testing to make sure manufacturing requirements are met.