Master Flow 2.67 in. x 50 ft. Zinc Moss and Mildew Preventer Strip

The GAF Master Flow Zinc Moss Preventer is used for long lasting protection against moss and fungus. Zinc Moss and Mildew Preventer installs easily near the roof ridge. It can be used with composite, shake or tile roofs and is EPA approved.

• Provides long-lasting protection against moss and mildew
• Installs easily near roof ridge
• For use with shingle, shake, or tile roofs