1 / 7Somafix S940 Polyurethane Expanding Insulation Foam, 850 ml
professional soma fix: Somafix S940 is a polyurethane expanding foam listed for thermal and acoustic insulation, gap filling and crack sealing. Its stated coverage is up to 2 m² per can at a 2 cm layer, and the listing says a foam gun is required but sold separately.
At a glance
- The listing presents the foam for heat and sound insulation as well as filling gaps and sealing cracks.
- Manufacturer-listed coverage is up to 2 m² from an 850 ml can when applied as a 2 cm layer.
- An adapter spray nozzle is claimed to be included. A metal dispensing gun is stated to be sold separately.
- The manufacturer claims adhesion to common building materials including concrete, wood, stone, brick, plaster and metal.
Reference price: £14.99
Price checked: 12 Nov 2026
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Pros and cons
Pros
- One can is listed for a range of gap-filling, crack-sealing and insulation tasks.
- The stated coverage and layer thickness give a reference point for estimating the area a can may cover.
Cons
- A foam gun is required for use and is sold separately, so the adapter nozzle alone is not the dispensing gun.
Technical specifications
9 specifications| Brand | professional soma fix |
|---|---|
| Model | S940 |
| Coverage claim | 2 m² per 850 ml can |
|---|---|
| Listed thickness | 2 Centimetres |
| Recommended uses | Thermal Insulation, Acoustic Insulation, Gap Filling, Crack Sealing |
| Number of packs | 1 |
| Material listed | Polyurethane Foam |
|---|---|
| Country of origin | Turkey |
| Weight listed | 850 Grams |
|---|
What to know before buying
- The stated coverage of up to 2 m² is conditional on a 2 cm layer and is a manufacturer claim, not a guaranteed result. The listing also claims moisture and temperature-fluctuation resistance without giving test conditions.
What’s in the box
Included- Insulation expanding foam
Who is it for?
A good fit for
- DIY users filling gaps or cracks who need a polyurethane foam also listed for thermal or acoustic insulation.
- Buyers who already have a compatible standard foam gun and want an adapter-nozzle can.
Less suited to
- Buyers who need a complete kit with a metal dispensing gun included.
- Projects where a precisely verified insulation performance or coverage figure is essential.
Customer reviews on Amazon
- 5 stars
74% 74% - 4 stars
12% 12% - 3 stars
6% 6% - 2 stars
3% 3% - 1 star
5% 5%
Customer feedback highlights reported effectiveness for filling holes, ease of use, strength and quick drying, while adhesiveness and foam distribution receive mixed reports, including mentions of foam falling out of holes. For gap-filling jobs, these differing adhesion experiences matter alongside the listing's conditional coverage claim, so results may depend on the application. Ratings are mostly five-star, but the lower-star ratings show that experiences are not uniformly positive.
Positive themes
- Customers report that it fills holes effectively.
- Customers mention ease of use, strength and quick drying.
Mixed feedback
- Adhesion feedback is mixed, with some customers saying it sticks well and others reporting that foam falls out of holes.
- Foam distribution feedback is mixed.
Frequently asked questions
Is a foam gun included?
The listing says a foam can and adapter spray nozzle are included, while the metal dispensing gun is sold separately. A gun is required to use the product.
How much area does one can cover?
The manufacturer claims coverage of up to 2 m² per 850 ml can when applied in a 2 cm layer. Actual coverage is not established by that listing claim.
What uses are listed for the foam?
Recommended uses are thermal insulation, acoustic insulation, gap filling and crack sealing.
Which materials does the listing say it bonds to?
The manufacturer claims bonding to materials including concrete, wood, stone, brick, plaster and metal.
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