Bostik Expanda Foam

Bostik Expanda Foam is a one-component, multi-purpose polyurethane foam that expands on application to fill, seal, and insulate gaps and cavities. It cures to form a strong, durable, and flexible seal, making it ideal for both DIY and professional use.

Variants

• Bostik Expanda Foam 350ml

  • Compact can size – convenient for smaller jobs
  • Ideal for sealing around windows, door frames, pipes, and small cavities
  • Expands to fill gaps quickly and easily
  • Great choice for home repairs and light trade applications
• Bostik Expanda Foam 650ml
  • Larger can – designed for bigger sealing and insulation tasks
  • Provides greater yield for commercial or high-volume use
  • Suitable for filling large wall cavities, service penetrations, and construction gaps
  • Cost-effective option for professionals needing more coverage per can

Key Features

• Expands up to 3 times its original volume to fill irregular gaps
• Provides insulation against noise, drafts, dust, and moisture
• Strong adhesion to timber, masonry, metal, and most plastics
• Can be trimmed, sanded, and painted once cured
• Resistant to water, heat, and ageing
• Easy-to-use aerosol application

Applications

• Sealing gaps around windows, doors, and frames
• Filling cavities in walls, ceilings, and floors
• Insulating service penetrations (pipes, cables, ducts)
• General construction, renovation, and repair work