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Low Expansion PU Foam

One component self-expanding, ready-to-use polyurethane foam with low post expansion formula.

  • Easy to apply.
  • Fixing and insulating of door and window frames
  • Excellent adhesion
  • Low expansion, low pressure rates
low expansion PU foam can window door cavity filling New Zealand

Product Overview

Low Expansion PU Foam is a one-component polyurethane foam specifically formulated for professional window and door installations, as well as filling openings and bonding various building materials. It cures with ambient humidity and adheres well to all construction materials. After application, it expands up to 40% in volume, so only partially fill the openings. Once cured, the foam ensures a strong bond and offers excellent insulation properties.

Find out how you can get Low Expansion PU Foam in Private Label

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Recommended Uses

  • Ideal for sealing windows and doors
  • Insulating, and soundproofing
  • SIP panels
  • Filling and sealing of gaps, joints and cavities
  • Insulating electrical outlets and water pipes.

Advantages​

  • Easy to Apply
  • Controlled expansion minimizes waste and cleanup
  • Excellent adhesion
  • Mould-proof, water-proof, over paintable
  • Very high yield
  • Easy to cut, sand, plaster, or seal after curing.
  • Gun Grade and Manual Adapters

Low Expansion PU Foam Packing

Low Expansion PU Foam can be supplied in aerosol can both gun grade and manual adapter depending on the requirement.

750ml cans| 500ml cans

Color: NA

Media & Downloads​

Frequently Asked Questions about Low Expansion PU Foams

What is Low Expansion PU Foam used for?

This foam is specifically formulated for professional window and door installation, as well as for filling construction openings and bonding building materials where controlled expansion is required.

How much does the low expansion PU foam expand?

Low Expansion PU Foam expands up to 40% after application. Openings should only be partially filled to allow space for expansion and to prevent overfilling.

How long does it take to harden?

The foam becomes tack-free in approximately 5–10 minutes and fully hardens within 1.5 to 5 hours, depending on ambient temperature and humidity.

Why choose low expansion over standard PU foam?

Low expansion foam is ideal for precision applications like door and window frames, where minimal pressure and movement are critical to avoid warping or misalignment during curing.

Can it be painted or cut after curing?

Yes. Once fully cured, PU foam can be trimmed with a knife and painted or coated with plaster, render, or other finishes to match surrounding surfaces.

Does it require any tools for application?

PU Expanding Foam is typically applied using a standard aerosol can with a straw applicator or a foam gun, depending on the product version. A foam gun allows for more precise application and better control.

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