About GAF Bonding Primer, PT A & B

GAF Bonding Primer is a two component, solvent-based epoxy primer designed to seal porous substrates while improving adhesion (formerly known as UniTile LV Sealer).

Features & benefits

Product Documentation

Resources for every professional


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

Architects & Design Pros

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

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