Expanding PU Foams

Q: What are expanding PU foams used for?

Expanding PU (polyurethane) foams are used for filling gaps, sealing around doors and windows, insulating cavities, and bonding building materials.

Q: Does expanding foam expand after application?

Yes. PU foam expands as it cures to fill voids and create insulation and air-seal barriers.

Q: Can PU foam be cut and shaped after curing?

Yes. Once fully cured, the foam can be trimmed, sanded, or shaped to fit recessed areas.

Q: Is expanding foam suitable for outdoor use?

Many PU foams are suitable for exterior use, but check product specifications for UV resistance and weather durability.

Q: How long does PU foam take to cure?

Curing time varies by product, but most foams become tack-free within minutes and fully cure within a few hours.

Q: Can PU foam improve insulation performance?

Yes. Expanding foam provides thermal and acoustic insulation when used to fill gaps and cavities in building structures.

Our expanding foam range covers sealing, filling and insulating jobs of every size. Bond-It expanding PU foam is available in gun grade and aerosol cans, including fire-rated options, and provides a strong, airtight, weather-resistant fill for window and door installation, gap filling and perimeter sealing. Quick curing and easy to apply for professional and DIY use.