Why Silicone Mastic?
GAF Silicone White Mastic is a thick, high-build silicone sealant. Provides protection against leaks due to ponding water. Box of 12 ea. 20 oz tubes.
- A high-solids sealant
- Low odor
- Brush grade for easy application
- Fast moisture cure
- Enhanced adhesion to a variety of substrates
