About GAF Silicone Mastic

A thick, high-build silicone sealant featuring low odor, an easy application, a fast moisture cure, and enhanced adhesion to a variety of substrates.

  • A high-solids sealant
  • Low odor
  • Brush grade for easy application
  • Fast moisture cure
  • Enhanced adhesion to a variety of substrates

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Features & benefits

Product Documentation

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Contractor applying coating with a brush

Request a Silicone or Acrylic Roof Coating Sample

Interested in silicone or acrylic roof coatings? Requesting a sample is a great way to see the difference for yourself. Use it to test, adhesion to your roof and ensure our coatings meet your needs
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Learn installation techniques from the pros.

GAF Silicone Coatings Installation Guide

As an easy-to-apply roof coating, silicone creates a highly flexible and monolithic membrane that offers unrivaled ponding water resistance and excellent UV protection, and won’t degrade, chalk, or crack from prolonged exposure to direct sunlight. Learn installation techniques from the pros.
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