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

View All Documents
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.
Watch series

Related products

Resources for every professional

Contractor working on a commercial roof

Contractors

We’re building new plants for greater capacity, and better systems for faster response and greater visibility.
Contractor Resources
An architect drafting blueprints

Architects & Design Pros

We’re building better, faster, more accurate access to the information you need.
Design Resources
A commercial storage facility

Property managers & owners

Whether you manage one property or many, we’re building the products and programs you need to reroof, restore, or maintain your investment.
Building Resources