Can I use this foam as a cavity insulation?

Probably, but it would take forever cost a fortune and filling properly and evenly would be impossible. For small areas where you have access then sure, for whole, existing walls no.

Is it for windows installation? Low expansion?

It’s medium expansion, but very durable and sticky. One of best foams I use for fitting casements and sashes windows. Do not over-do-it, but 20 min it’s enough to start pealing/cutting dry but not completely hard overgrow.

might someone know if this is close cell or open? gap filler or insulation please

I'm trying to find this out too. I think these types of foams tend to be closed cell with a proportion of open cells depending on what happens in the moment as they expand and cure. I've seen the odd product info sheet for various soudal foams and they say 70- 80% closed cell. However I got a bit confused by a Soudal Singapore site that was going on about the virtues of their open celled foams. (?) Anyway I think it's good for gap filling and insulation. They make foams which are slightly more tailored towards insulation or adhesion or whatever the primary aim is. The Soudal site says water ingress into cured foam is minimal with the 'skin' intact but more permeable if you leave trimmed foam unsealed.

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Description

🚀 Seal it like a pro — bulk foam for flawless finishes every time!

BULK POWERHOUSE - 12 cans of 750ml each to tackle any project without constant reordering
PRECISION APPLICATION - Gun-grade foam ensures controlled, mess-free expansion for flawless finishes
TIME COST EFFICIENT - High yield per can means fewer replacements and faster job completion
TRUSTED BRAND RELIABILITY - Soudal’s proven formula with 4.7-star rating ensures consistent, top-tier performance
PROFESSIONAL GRADE EXPANSION - Expands to fill gaps and cracks with superior adhesion and durability

The Soudal Expanding Foam Filler Gun Grade comes in a convenient box of 12 cans, each containing 750ml of high-performance mounting foam. Designed for professional use, this gun-grade foam expands reliably to fill gaps, cracks, and cavities with strong adhesion and durability. Ideal for large-scale projects, it offers excellent value and efficiency, backed by a trusted brand with a 4.7-star customer rating.

Specifications

ASIN	B00FKED1ZM
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	11,104 in DIY & Tools ( See Top 100 in DIY & Tools ) 37 in Expanding Foams
Customer Reviews	4.7 4.7 out of 5 stars (418)
Date First Available	12 Dec. 2013
Delivery information	We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
Item Package Quantity	12
Item Weight	12.5 kg
Manufacturer	SOUDAL GUN GRADE EXPANDING FOAM 12x750ml
Manufacturer reference	VSA20AA
Package Dimensions	29 x 26 x 22 cm; 12.5 kg
Part Number	VSA20AA

Reviews

L**B

Good value for money

Great product good value for money

18.01.2026

D**O

Good value

Quick delivery, well packaged, and good value.

2.03.2026

A**R

Good foam

Great item

11.11.2025

R**Z

Good product

16.10.2025

N**D

As expected

31.12.2025

M**N

Great value

Excellent good value 👍 (Watch 10 out of 10 by Ray Comfort on YouTube)

10.12.2025

E**T

Excellent

Good value for money

5.12.2025

M**Y

As described A++

27.11.2025

D**E

👍

10.03.2021

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