Soudal Plasterboard Adhesive Foam

[john2k]

I need to put a piece of plasterboard onto a window lintel - the type that's metal. So I have the window lintel itself which has a flat surface but on each side of it there is gaps. I wanted to using the following Soudal Plasterboard Adhesive Foam: https://www.toolstation.com/soudal-genius-gun-plasterboard-adhesive-foam/p99304

But i'm not sure if this product expands like the regular expanding foam. Does anyone know if it expands? or should i just spray lots of it into the gap areas and a bead on the back of the board and stick it on?

Thanks

 

[23vc]

It’ll expand a bit, but you’ll need to have the board held in place while the foam sets anyway so it’ll work fine. It wont expand to the degree that it pushes the board out, if that’s what you mean

 

[noseall]

But i'm not sure if this product expands like the regular expanding foam. Does anyone know if it expands?

It is low-ex but it does expand.

or should i just spray lots of it into the gap areas and a bead on the back of the board and stick it on?

Thanks

Do as VC says above, i.e. have a couple of props and a flat piece of board handy, ready to prop. We did one recently, whereby we wanted the board to stand off from the lintel a wee bit, which is not easy to achieve with foam. So we pre-fixed a few packer/spacers to the lintel the day before. It was then just a case of pressing the board against the spacer/packers and propping until set.

 

[^woody^]

It only expands in the sense of when it comes out the can it foams a bit but then stops after few seconds.

It needs to be left for about 5 minutes anyway before offering up the board.

Use a water mist spray to help grip and speed up setting

 

[23vc]

It needs to be left for about 5 minutes anyway before offering up the board.

Does it? Oops. That probably gives it a better tacky grab, noted

 

[mrrusty]

It needs to be left for about 5 minutes anyway before offering up the board.

Not sure I totally agree with that. I think it depends on the brand of foam. I've found with Instastik that it skins rapidly, and if you wait too long, it skins too much to get a good grip. Pinkgrip foam which I've also used, seems to take a bit longer to go off.

 

[noseall]

It only expands in the sense of when it comes out the can it foams a bit but then stops after few seconds.

It needs to be left for about 5 minutes anyway before offering up the board.

Use a water mist spray to help grip and speed up setting

Five minutes? Over 20 boards, thats a lot of KitKats. Give me board adhesive (dab) any day.

 

[mrrusty]

Five minutes?

My house has a load of board - squirt and stick, no waiting! Hasn't fallen off yet... The 5 minute thing isn't mentioned in the instastik application instructions.... No breaks, no kit kats

 

[23vc]

I’ve only ever foamed bits of board, which it’s a game changer for, but not full boards. I can picture it being a right ball ache and totally unforgiving to tap them around to get them plumb, like you can with dab, as theres no grab with foam until it’s set. Is that the case? Guess completely flat substrate not so bad

 

[catlad]

. No breaks, no kit kats

I'm not working for you!

 

[mrrusty]

@23vc yes in my experience foam is really only good for boards if the wall is flat

 

[noseall]

I’ve only ever foamed bits of board, which it’s a game changer for, but not full boards. I can picture it being a right ball ache and totally unforgiving to tap them around to get them plumb, like you can with dab, as theres no grab with foam until it’s set. Is that the case? Guess completely flat substrate not so bad

The gear is not much cop at trueing up boards or if your boards have memory, or for pointing or thickening out.

 

[^woody^]

Five minutes? Over 20 boards, thats a lot of KitKats. Give me board adhesive (dab) any day.

Arrh, but can you be skimming your dabbed boards 30 minutes after fixing?

 

[^woody^]

The gear is not much cop at trueing up boards or if your boards have memory, or for pointing or thickening out.

Get better bricklayers.

 

[foxhole]

I use to spray it on , then touch board to wall which killed any further expansion , then pushed into place and added a coupe of mechanical fixing at top . Had no issues or failures .
On a continuous run you can foam two boards fix one then foam another board while fixing previous without any waiting.