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Pro Foam Air Seal

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.


For Interior and Exterior Use

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 and service penetrations.

Unlike most PU foams, FM330 can be used in temperatures as low as -3°C.

  • 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


750 ml pressurised canister (12 per carton)

Technical data


PropertyTest MethodResults
Composition Polyurethane Foam
Fire ClassificationDIN 4102-1B3
Yield 34 litres
Water Absorption

EN 1609

0.2 kg/m²
DensityLAB 01515  - 25 kg/m³
Tack Free TimeFEICA TM 1014 at 23°C & 50% RH

10 minutes

Cutting TimeFEICA TM 100545 minutes
Loading Time 24 hours
Air TightnessEN 12114< 0.1 m³/(h.m) at ±1750 Pa
Movement CapabilityFEICA TM 101350%
Compressive Strength (10%)FEICA TM 101111 kPa
Elongation at BreakFEICA TM 101850%
Thermal ConductivityEN 1266736 mW/m.K
Maximum Acoustic RatingEN ISO 140-1 : 2005-0363 dB
Application Temperature Canister: +5°C to +30°C
Ambient: -3°C to +35°C
Service Temperature Short Term:  -40°C to +130°C
Long Term:  -40°C to +90°C
Storage Store in shaded dry conditions between +10°C and +25°C.  Store canisters upright. The product is contained in a pressurised container - observe storage instructions and do not apply heat.
Shelf Life 24 months when stored as recommended in original unopened containers.
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