Prevent black roof stains from returning as quickly
DEFY Stain Blocker helps prevent algae stains from returning. Once the roof has been properly cleaned and rinsed it should be treated with DEFY Stain Blocker. This milky white liquid treatment dries to a clear natural look. Simply spray on cleaned asphalt shingle roofs to form an invisible barrier that blocks the return of unsightly roof stains.
This product contains no acids, caustics, or bleaches, will not harm plants when used as directed and treats approximately 250 sq. ft. per gallon on roofs.
Maintain your roof's good looks
Maintenance coats of Stain Blocker for Roofs can be re-applied every 2-3 years or at the first sign of stain return to help block further staining. The frequency of maintenance coats will depend on many factors. Climate, orientation of the roof and surrounding trees are just a few of the factors that determine the algae growth. In extreme cases maintenance coats may need to be applied yearly. In ideal situations maintenance coats may only be needed once every five years.
DEFY Stain Blocker is ready to use. Do not dilute. Maintains appearance of roofsLong lastingEnvironmentally friendlyEconomical