Enhance the adhesion of top coats over existing or new single-ply TPO and most PVC membranes
United Coatings™ SP Primer is a low-viscosity, high-build, water-based acrylic primer that develops a tenacious bond to new or existing TPO and most PVC single-ply membranes. It was designed for providing optimum adhesion of Roof Mate™ Coatings and other acrylic top coats over these roofing subsrates.
Substrate Preparation: Roof must have positive drainage with no moisture trapped in the roof membrane. Roof substrate must be clean, completely dry, and free from any foreign matter. Pressure-wash to remove all dust and debris, and allow to dry. Examine substrate to receive new roofing and conduct test patches to verify adhesion of coating prior to start of work. Check for any damaged roof membranes, including all flashings and penetrations, and repair as needed.
Application: Apply United Coatings™ SP Primer at the rate of 0.50 – 1 gal/100 ft2 (2.04 – 4.08 L/10 m2), using airless spray or roller, to the properly prepared surface. Substrate porosity and condition will determine the required application rate. Allow United Coatings™ SP Primer to dry thoroughly prior to top coating. This will require approximately 3 hours at 75°F (24°C) and 50% relative humidity. Allow longer dry time at lower temperatures and/or higher humidity.
For Application Questions: Contact GAF Technical Services at 1-800-766-3411 or visit gaf.com.
ASTM D2369, ASTM D5201, ASTM D1475, ASTM D2370
|UNITED COATINGS™ SP PRIMER|
|Solids by Weight||64% (±2) [ASTM D2369]|
|Solids by Volume||52% (±2) [ASTM D5201]|
|Weight per Gallon||11.6 lbs (±.2) [ASTM D1475]|
|VOC||< 50g />mL [ASTM D3960]|
|Ultimate Tensile Strength||175 psi (± 20) [ASTM D2370]|
|Elongation at Break||210% (±20) [ASTM D2370]|
|Tear Strength||76 (±10) [ASTM D624]|
|Hardness (Shore A)||40 to 50 [ASTM D2240]|
|Dry Time||3 hours @ 75°F (24°C), 50% R.H. [ASTM D1640]|
|WET ADHESION RESULTS*|
|SINGLE-PLY MEMBRANE||ADHESION (PLI)||FAILURE MODE|
|Genflex TPO (New)||2.85||Primer Cohesive|
|GAF TPO (New)||2.95||Primer Cohesive|
|Firestone TPO (New)||2.67||Primer Cohesive|
|Carlisle TPO (New)||2.50||Primer Cohesive|
|Carlisle TPO (14 yr exposure)||2.23||Primer/Membrane|
|Sarnafil PVC (New)||1.5||Primer Cohesive|
|JM PVC (New)||1.95||Primer Cohesive|
|Carlisle PVC (New)||1.65||Primer Cohesive|
All documents are U.S. English unless otherwise noted