Closed cell spray foam.

[BigGitt]

Which canister spray foam has the "most" closed cells? Need to seal against exterior wall.

 

[MathiasS]

Closed cells? What do you mean it would be a measure of? The density?

How wide a joint do you need to make?

 

[BigGitt]

Yes. The density.
It becomes a complement to regular insulation. approx. 100mm width.

 

[MathiasS]

Then you can use Essves foam which is considered diffusion-tight in joint widths over 50mm.

 

[BigGitt]

Then you can use Essve's foam which is considered diffusion-tight in seam widths over 50mm.

Ok. Thanks.

 

[thomasx]

But they are still open cells in essves foam, right?

 

[Matti_75]

Essve is working on a foam that will replace backing rod and soft sealant.

 

[MathiasS]

Essve is in the process of developing a foam that will replace backer rod and sealant.

Do they already have a foam that replaces backer rod and sealant?

 

[Matti_75]

Do they already have a foam that replaces backing rod and soft sealant?

Which foam is it? I talked to a salesperson before the vacation who said the new one was on the way. It shouldn't expand as much as a regular one, and should be in a cartridge?

 

[MathiasS]

It is "the usual" Fog&Drev 199, also allows for post-adjustment. Even "Pistolskum 65" is diffusion-tight over 50.

Perhaps FD199 will come in a pistol variant?

 

[Matti_75]

Yes, they are vapor tight, but this was some new type of foam. I will contact the Essve salesperson on Monday and check if it will be available soon.