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

Features & benefits

Product Documentation

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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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