Polycell Expanding Foam Polyfilla

About this product:

Ideal for filling and sealing awkward gaps, hollows and cavities. It shoots liquid foam deep into cavities, creating a long lasting seal, which insulates against heat, sound and moisture. Suitable for inside or out, it can be easily trimmed and sanded ready to be painted, filled or plastered. Contains a CFC – free propellant.

Technical Information

Tack free

20 minutes

Fully cured

12-24 hours


12 hours

Tools required

Gloves, water spray, knife

Key Benefits

  • Shoots liquid foam deep into cavities
  • Expands to make a long-lasting seal
  • Can be painted over, filled or plastered
  • Ideal for filling and sealing awkward gaps

Product Information

  • Sizes


Application Method

Ensure surfaces are clean and free from grease and loose material. Do not apply in very cold or hot (below 5 or above 25 degrees) conditions. Ensure good ventilation. Cover furniture, carpets and surrounding areas before use. Mask off wood and brickwork. Moisten surface to help the foam cure and expand, e.g. use a plant spray. Remove cap carefully, holding can away from the face on a flat horizontal surface. Shake can vigorously approx. 20 times to mix contents. Select applicator nozzle, dependant on bead size required and carefully screw onto the valve, taking care not to activate the valve. Do not over-tighten. Hold can upside-down away from the face. Use the applicator nozzle as shown on the leaflet inside the cap. Apply light pressure to the nozzle to test. Vary pressure to adjust the rate of foam. Start filling at the lowest point shaking can from time to time during use. If using more than one layer of foam, spray lightly with water between layers. Do not overfill – the foam will expand 2.5 times the initial volume extruded.