About GAF UniBase Primer
UniBase Primer is designed to enhance the adhesion of Roof Mate™ top coats or the PremiumCoat System over approved surfaces, and as a saturant for fabric reinforcement applications. UniBase Primer also acts as an excellent asphalt bleed blocker. Unibase Primer is an easy-to-apply, cost-effective method of securing reinforcing fabric over surfaces prone to structural movement, allowing the stress to be distributed over a broader area of the roof coating system.
It helps block the migration of asphaltic oils, so the United Coatings™ Roof Mate™ coating can reduce the risk of bleed-through problems often associated with conventional roof-coating systems.
Featured & benefits
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Low VOC
Meets all VOC emissions and regulations to eliminate facility downtime during installation -
Save time
Easy application and clean-up -
Multiple application methods
Can be brush, roll, or spray applied

Commercial roofing products: solutions for every roofing need
From single-ply membranes to full system solutions, and state-of-the-art digital services to hands-on training. GAF offers the range of durable, easy-to-use products and services you need to succeed.