Elastomeric Roofing - TOPCOAT Membrane



United Coatings Roof Mate WOB Flashing is a light gray, water-based, acrylic sealant that is applied to seams, fasteners, flashings, and penetrations prior to the application of an acrylic coating. It has superior adhesion, flexibility, and resistance to ultraviolet degradation.


United Coatings Roof Mate WOB Flashing is designed for use on metal, wood, and concrete. Provides a seal along seams and around fasteners on metal roofs and excellent sealing around curbs and counter flashings. Do not apply at temperatures below 42°F. Substrate temperatures must be below 120°F when applying product.

  • A synthetic rubber sealant that cures in the ultraviolet rays of the sun

  • Water-based

  • Strong; forms a flexible seal that will not become brittle

  • Flexible; will expand and contract with metal roof

  • Free from plasticizers and oils that will migrate out over time

  • Required for joints, seams, penetrations, and fastener heads

Available Sizes:

5 gallon (18.9 liter) pail

Available Colors:

White, Lt Gray

Physical Properties
Roof Mate WOB Flashing
Application Rate
5 gallons/125 lineal ft. of seam (6” width)
Application Method
Brush or caulking gun
Application Temp (air, surface)
42° - 120°F
Drying Time (75°F, 50% RH)
Approximately 24 hours per coat
Wet Mil Thickness
105 wet mils
Dry Mil Thickness
60 dry mils
Total Solids (by weight)
68% ± 1%
Total Solids (by volume)
56% ± 2%
Specific Gravity
1.44 ± 0.1
Weight per Gallon
12.0 ± 0.5 lbs
Viscosity (75°F)
225,000 ± 22,500 cps
Tensile Strength
225 psi ± 10%


All documents are U.S. English unless otherwise noted

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