ExoAir® Flex Foam

Flexible, Low-Expansion Polyurethane Foam

ExoAir® Flex is a single-component, high performance, gun-grade polyurethane flexible foam that performs as a thermal barrier. With an industry leading movement range of +/-15% (Movement Accommodation Factor of 30%), ExoAir Flex, part of the T3 Building Solutions System, protects against thermal expansion and contraction. ExoAir Flex is CFC-free and can be applied over a wide temperature range, making it a reliable, fourseason solution.

Basic Uses
  • ExoAir Flex is best suited as a thermal and sound barrier to be used in the perimeters around windows and doors.
  • The recommended application temperature is from 27 to 95 °F (-3 to 35 °C).
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Product Details, Safety, and Installation
  • What surfaces will ExoAir Flex Foam adhere to?
    ExoAir® Flex Foam will gain satisfactory adhesion to most window materials and other common building materials.
  • What are the industry test methods conducted on ExoAir Flex Foam?

    ExoAir® Flex Foam has been tested in accordance with AAMA 812 and ASTM D2842.

    • AAMA 812 is a voluntary practice for assessment of single component aerosol expanding polyurethane foams for sealing rough openings of fenestration installations
      • ExoAir® Flex Foam had a maximum pressure build of 0.633 psi which indicates low potential for bowing or warping of windows and doors
    • ASTM D2842-06 is a standard test method for water absorption of rigid cellular plastics, Procedure B
      • After 96 hours of immersion, ExoAir® Flex Foam had a .03% water absorption which indicates there is little or no water absorption


  • Are both straw and gun-grade products available?
    ExoAir® Flex Foam is available in gun-grade only
  • Are product samples available?
    Please contact your sales representative if a sample is needed.