#298E Elastomeric Asphalt Emulsion – 298E

Premium Elastomeric Modified Asphalt Emulsion
Formulated For Colder Weather – Water Based – Non-Fibered – Non Flammable & Odorless
ASTM D1227 Type III (Rubber Modified)

#298E Elastomeric Asphalt Emulsion is an asphaltic bentonite clay emulsion modified with acrylic rubber to achieve a permanently elastomeric waterproofing compound and surface coating. When cured, #298E Elastomeric Asphalt Emulsion resists checking and cracking. The dry film remains flexible and will not sag, flow or re-emulsify. Special unblown soft asphalts help improve the weathering characteristics of #298E Elastomeric Asphalt Emulsion as well as enhance resistance to industrial pollutants, contaminants and corrosives. Premium acrylic rubbers increase the elongation of #298E Elastomeric Asphalt Emulsion and also give it greater adhesion and low temperature flexibility.

#298E Elastomeric Asphalt Emulsion may be used as a surface protectant or as a waterproofing compound using polyester and or fiberglass reinforcements. Applied as a roof protectant, Product

#298E’s unique formulation allows the film to “breathe” while drying and is waterproof upon curing. Roof surfaces protected or surface’s primed with #298E Elastomeric Asphalt Emulsion are especially suited for application of #525 Western Colloid SilverWhite Aluminum Reflective Coating.

#298E Elastomeric Asphalt Emulsion is water based and can be applied to most clean (dust and oil free) surfaces. It can be applied to dry or damp (not wet) surfaces using rollers, knotted brushes, squeegees or spray equipment. If you need assistance with the application of this product or need assistance with choosing equipment for the proper application of #298E Elastomeric Asphalt Emulsion, contact Western Colloid.

#298E Elastomeric Asphalt Emulsion is the principle component in many of our Fluid Applied Reinforced Roofing systems.

#298E Elastomeric Asphalt Emulsion is the primary waterproofing component of many UL Class A and FM 4470 Approved roofing systems.

Western Colloid’s #298E is an elastomeric modified, clay stabilized, asphalt emulsion. It’s premium acrylic rubber modifier gives it unique characteristics. It has greater toughness, more flexibility, elongation and adhesion, especially in cold weather.


  • A uniform weathering surface for smooth or mineral surfaced composition built-up roofing.
  • A waterproofing compound for cold process, built-up roof systems utilizing polyester and or fiberglass reinforcements.
  • A protective surface for metal roofing, masonry, stucco, parapet walls, curbs and base flashings.
  • A corrosion resistant surface for most exterior metal surfaces.
  • A damp proofing compound for below grade walls.
  • A base coat for #525 SilverWhite reflective coating.
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