FREE SHIPPING on orders over $300 and $9.99 for all others.Now serving AL, FL, GA, KY, LA, MS, NC, NJ, NY, SC, TN & TX!

UniBase Primer 5 Gallon

In stock
A low-viscosity, highly penetrating, advanced acrylic polymer adhesive and primer.

Why 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.


Benefits of GAF UniBase Primer include:
  • Products can be brush, roll, or spray applied
  • Meets all VOC emissions and regulations to eliminate facility downtime during installation
  • Easy application and clean-up
  • Excellent asphalt bleed blocker
  • Low toxicity
Specifications (All Dimensions are Nominal)
ColorsTranslucent Green
VOC< 50 g/L
Application Temperature (Air, Surface)Air: 50°F and Rising (10°C); Surface: 50°F – 110°F (10°C – 43°C)
Tensile Strength300 psi (2.1 kPa)
Elongation500% (±50)
Dry Time1 – 2 hrs @70°F, 50% R.H.
Interply Adhesion (Wet or Dry)20 pli (±2) @ 70°F
Colors: Translucent Green
VOC: < 50 g/L
Application Temperature (Air, Surface): Air: 50°F and Rising (10°C); Surface: 50°F – 110°F (10°C – 43°C)
Tensile Strength: 300 psi (2.1 kPa)
Elongation: 500% (±50)
Dry Time: 1 – 2 hrs @70°F, 50% R.H.
Interply Adhesion (Wet or Dry): 20 pli (±2) @ 70°F
FBCState of Florida Approved
Miami-Dade CountyMiami-Dade County Product Control Approved
FBC: State of Florida Approved
Miami-Dade County: Miami-Dade County Product Control Approved
Shipping and Packaging
Pail5-gallon (18.9 liter)
Drum55-gallon (208 liter)
Shelf Life18 months 50°F - 90°F (10°C - 32°C)
Pail: 5-gallon (18.9 liter)
Drum: 55-gallon (208 liter)
Shelf Life: 18 months 50°F - 90°F (10°C - 32°C)
  • GAF Roofing | A Guide to a Proper Adhesion Test
    We are GAF. ( More homes and businesses in the U.S. are protected by a GAF roof than by any other product. We are the leading roofing manufacturer in North America, with plants strategically located across the U.S. For over a century, we have manufactured and sold a wide variety of high-performing residential and commercial roofing products including Timberline, North America's best-selling roof shingle. People trust GAF to protect what matters most in their daily lives.