Foster 56-10 Weatherite Mastic | GLT Products

Foster 56-10 Weatherite Mastic

Foster® 56-10™ Weatherite™ Coating is a water-based weather barrier coating used for a wide variety of applications over most thermal insulations including polystyrene. It will seal out dirt and water and provide protection for the insulation.

WEATHERITE COATING has excellent brush and spray properties, is non-flammable when wet and has a mild odor during application.

WEATHERITE COATING meets NFPA 90A and 90B 25/50 requirements. WEATHERITE COATING complies with current USDA regulations regarding use in meat and poultry processing areas under federal inspection. Letter of compliance is available upon request.


  • Tough, bright white, fire-resistive dry film
  • Extremely flexible and smooth, attractive, decorative finish. 
  • Suitable for both indoor and outdoor applications
  • Excellent adhesion to most foil facings.
  • No asbestos, lead, mercury, or mercury compounds.

For the most up-to-date SDS sheet, visit the manufacturer’s website: Foster Products

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