ExoAir Flex Foam

A single-component, high performance, gun-grade polyurethane flexible foam that performs as a thermal barrier. With an industry leading movement range of +/-15%, ExoAir® Flex Foam protects against thermal expansion and contraction around windows, doors, base plates, joints, penetrations and cracks. ExoAir Flex Foam is CFC-free and can be applied over a wide temperature range.

ExoAir Flex Foam

Flexible Low-Expansion Polyurethane Foam

ExoAir Flex Foam is a single-component, high-performance polyurethane sealant formulated to deliver superior thermal protection and long-lasting flexibility. Designed for dynamic joints and penetrations, this low-expansion foam provides an exceptional movement range of ±15%, accommodating thermal shifts and building movement without cracking or bowing windows and doors. It is a fast, reliable solution for professional sealing tasks.

Key Benefits of ExoAir Flex Foam<

  • Lasting Flexibility: Ideal for dynamic joints, maintaining a durable seal without cracking over time.
  • Minimal Expansion: Low-pressure formulation prevents window distortion during application.
  • Fast Installation: Ready to tack in 10 minutes and can be trimmed in just 45 minutes.
  • Low Temperature Application: Installs effectively even in winter conditions.

Common Applications

  • Dynamic joints in building envelopes
  • Sealing around windows and doors
  • Base plates and structural transitions
  • Pipe penetrations and cracks

Packaging & Installation

ExoAir Flex Foam is applied using a foam dispensing gun for precision control. Its convenient application and quick set times make it ideal for fieldwork and time-sensitive projects. With reliable thermal insulation and flexibility, it supports both commercial and residential air sealing needs.

Product Properties

Property Value
Application Method Foam dispensing gun
Application Temperature 27 to 95 °F (-3 to 35 °C)
ASTM C518: Thermal Resistance per Inch 3.64 R/in
Service Temperature -40 to 194 °F (-40 to 90 °C)
Technology Polyurethane foam

Also see ExoAir 210AT for self-adhered vapor barriers. Visit Tremco Sealants for more solutions.