Algae Defender

Your roof. Defended.

PABCO® shingles and accessories featuring Algae Defender® are made to the highest-quality standards and backed by the best algae resistance warranty in the industry. PABCO® has over two decades of experience in producing premium algae resistant asphalt shingles using proven manufacturing techniques that provide lasting protection against black streaks caused by algae.

When you want the best, specify PABCO® Roofing Products featuring Algae Defender®.

Algae Resistant Shingles Designed to Prevent Black Streaks


  • Up to a limited lifetime warranty against black streaks caused by algae*.
  • Quality you can trust from PABCO® Roofing Products.
  • Not just algae resistant…Algae Defender.


PABCO® Roofing Products is proud to produce our premium asphalt shingles featuring Algae Defender™ with the best algae resistance warranty in the business. Many areas of the United States are susceptible to black streaks on rooftops caused by algae. 


PABCO® shingles and accessories featuring Algae Defender are made to the highest-quality standards to prevent black streaks caused by algae from forming on your roof. “We have a precise target blend of copper containing granules in the manufacturing process and our results are closely monitored during every production run,” explains Rebecca Newman, Plant Operations Manager, “When moisture contacts your Algae Defender protected roof in the form of dew or rain, copper ions are gradually released over time to provide reliable protection from black streaks caused by blue-green algae.”