TOPCOAT® Surface Seal SB Primer is a light gray, solvent-borne, thermoplastic rubber based, industrial primer/rust inhibitor that must be applied to any areas of rust before TOPCOAT® Surface Seal SB Roofing Membrane can be applied. It is ideal for priming aluminum coated metal roofs, which are beginning to rust through the coating. Surface Seal SB Primer can be used to brush-treat small scattered areas of rust, or it can be sprayed over areas of widespread rust. Heavy, flaking rust and scale must be removed by scraping, wire brushing, or grit blasting, followed by power washing with water.
SB Primer is designed for priming rusty metal roofs prior to applying TOPCOAT® Surface Seal SB Roofing Membrane, TOPCOAT® Membrane or Topcaot®FlexSeal. Unlike TOPCOAT® MP-300, it is compatible with asphalt-based coatings and cements. Substrate shall not pond water for a period longer than 48 hours. Surface must be free of ponding water, ice, snow, and debris prior to application. Do not apply at temperatures below 32°F. Substrate temperatures must be below 120°F when applying product.
For application questions, please contact GAFMC Contractor Services at
ASTM D-412, ASTM G-21, ASTM B-117, ASTM D-1475, ASTM C-794, ASTM E-1644
Note: Repair leaks promptly to avoid adverse effects, including mold growth
*See warranties and guarantees for complete coverage and restrictions.
**When used as a part of a multi-ply system
|TOPCOAT® Surface Seal SB Primer Technical Data|
|Application Rate:||1 gallon/100 sq. ft.|
|Application Method:||Airless sprayer or brush|
|Application Temp (air, surface):||32°F – 120°F|
|Drying Time (75°F, 50% RH):||Approximately 2 hours|
|Wet Mil Thickness:||16 wet mils|
|Dry Mil Thickness:||7 dry mils|
|Total Solids (by weight):||60% ± 2%|
|Total Solids (by volume):||45% ± 2%|
|Specific Gravity:||1.21 ± 0.1|
|Weight per Gallon:||10.1 ± 0.5 lbs|
|Viscosity (75°F):||10,000 ± 2,000 cps|
|Storage:||Store in well-ventilated area at 50°F to 80°F; protect from freezing|
|Shelf Life:||1 Year|
All documents are U.S. English unless otherwise noted