FM330 Pro Foam Air Seal

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One part, rapid, moisture-curing expanding polyurethane foam which is gun applied and has excellent elasticity, air tightness and acoustic properties. Excellent adhesion to brick, block, stone, plaster and cementitious materials as well as wood, metal and a variety of plastics. The low post-expansion facilitates greater control during application.


FM330 is ideal for use as an air tight gap filler for general construction joints including where movement is expected to occur. It is suitable for applications such as airtight window and door perimeter joint seals, sealing floor to wall and wall to ceiling joints and pipe & service penetrations.

FM330 is not UV resistant and should be protected from sunlight with a suitable opaque sealant, filler or paint. As with all PU foams, it does not bond to polythene, Teflon®, siliconised or wax-like surfaces.

Safety data sheet must be read and understood before use.
Extremely flammable - keep away from open flames and other ignition sources.

  • A high performance PU foam with excellent acoustic and airtight performance
  • Airtight formulation - tested to EN 12114
  • Acoustic dampening - up to 63 dB joint insulation index
  • Elastic performance - up to 50% movement capability ensures integrity of the seal in the event of movement
  • Sub-zero formulation - can still be used at temperatures as low as -3°C
  • Low post-expansion facilitates more accurate application depth
2 in 1 PU Foam Application Advice.pdf Application Instructions
FM330 Safety Data Sheet (en-GB).pdf Safety Data Sheets
Full i3 System (including Compriband TP600 - External Weather Seal) BBA Certificate (en-GB).pdf Test / Certification Document
FM330 Technical Data Sheet (en-GB).pdf TDS