Soudal Pro Expanding Foam Genius
Soudal Pro Expanding Foam Genius is a self-expanding gap-filling foam with a built-in Genius applicator, so you can fill, seal and insulate one-handed without a separate foam gun. Once cured it is water resistant and will not shrink or expand, giving a stable fill that stays put around frames, joints and penetrations.
It suits filling gaps and cavities, joints and pipe penetrations, and installing window and door frames, and it works as an air seal to improve thermal and acoustic insulation. Once cured it can be cut, sanded, plastered or covered with sealant. The built-in applicator stays usable for up to 6 weeks after first use, so a part-used can is ready for the next job.
See the full expanding foam range for straw and gun-grade options.
Packaging
| Item Code | Size | Colour | Units/Box |
| 175532 | 500ml | Champagne | 12 |
| 175527 | 750ml | Champagne | 12 |
Features & Benefits
No gun, no fuss. The Genius applicator is built in, so there is no separate gun to buy, fit or lose, and you can work accurately with one hand.
Stays where you put it. No shrink and no post-expansion once cured means the fill holds its shape rather than bulging or pulling back from the joint.
Re-openable for weeks. Reusable for up to 6 weeks after first use, so you are not throwing out half a can between jobs.
Seals out noise, cold and draughts. A single application insulates against sound, cold and air movement around frames and penetrations.
Applications
Gap‑filling expanding foam has a variety of applications across residential, commercial, and light industrial builds in Australia. Key use cases include:
- Sealing Gaps Around Window & Door Frames – Prevent drafts and improve energy efficiency.
- Pipe & Conduit Penetrations – Seal around plumbing and electrical penetrations to improve insulation and reduce sound transfer.
- Mounting Built‑in Boxes, Frames & Flexible Tubes – Use the foam for supporting and insulating built‑in fixtures.
For more options, see our range of Fire Rated foams or explore our full product range to see all solutions available for different sealing needs.
Instructions
- Surface Preparation – Ensure surfaces are clean, dry, and free from dust or grease.
- Shake the Can Well – Helps ensure proper mixing for consistent expansion.
- Apply with Applicator Gun – Use the trigger nozzle to apply the foam, filling the gap approximately 30‑50% full.
- Cure Time – Foam will form a skin in minutes, with full curing typically taking 24 hrs.
- Finish – Once fully cured, the foam can be trimmed, sanded, or plastered over to achieve a clean, finished look. For external use, apply a protective coating to prevent UV degradation.
If you need preparation or priming guidance, check out our Primers & Activators to help with surface adhesion and preparation.
Ready to get started with Soudal Pro Expanding Foam Genius? Use the Soudal store locator to find your nearest stockist and pick it up today.
FAQs
Do I need a foam gun to use Soudal Pro Expanding Foam Genius?
No, the Genius applicator is built into the can, so you apply it one-handed without a separate foam gun. That makes it well suited to quick jobs and tradies who want accurate control without extra tools.
How long can the can be reused after opening?
The can stays usable for up to 6 weeks after first activation. That lets you pick up a part-used can for the next job rather than discarding it, which cuts waste and cost.
Can the foam be painted or plastered once cured?
Yes, once fully cured it can be cut, sanded, plastered or covered with sealant for a clean finish. For outdoor use, coat it to protect against UV, which would otherwise degrade exposed foam.
What does Pro Expanding Foam Genius stick to?
It adheres to most common building materials around frames, joints and penetrations. Surfaces should be clean, dry and free of dust or grease before application for the best bond.
Where can I buy Soudal Pro Expanding Foam Genius in Australia?
It is stocked at Soudal trade and retail outlets across Australia in 500ml and 750ml cans. You can find where to buy at a Soudal stockist near you.