Gluing with polyurethane foam/sealant foam?

[Olf Oggler]

Can you glue with polyurethane foam? From my own experience, I know that the adhesion is very good. It sticks to everything, usually where you don't want it. It's almost impossible to remove if you spill it on any surface.

Let's say I want to attach plaster to uneven leca walls. I also want a minimal extension. But preferably an air gap behind for electricity and some other things. If I use lightweight concrete screws to attach battens, say 22x70mm, at strategic points. That is, I have to place shims at the attachment points so it becomes straight. Could I then spray polyurethane foam between the battens and the wall where there is otherwise empty space? Partly so it doesn't give way if you press on the wall. But also for increased strength. What do you think? Will it work?

 

[Peter2400]

Can you glue with polyurethane foam? From my own experience, I know that the adhesion is very good. It sticks to everything. Usually where you don't want it. It's nearly impossible to remove if you spill it on a surface.

Let's say I want to attach plaster to uneven leca walls. At the same time, I want minimal protrusion. But preferably an air gap behind for electricity and some other things. If I attach battens with aerated concrete screws, say 22x70mm, at strategic points. Meaning I'll have to use spacers at the attachment points to make it straight. Could I then spray polyurethane foam between the battens and the wall? Where there would otherwise be a void? Partly so it doesn't give way if you press on the wall. But also for increased strength. What do you think? Will it work?

It's a very strong adhesive if you have high clamping pressure; if you don't, the adhesive expands into foam and doesn't become as strong. But I absolutely think it can help make it sturdy, but I would use Biltema's stone adhesive, it expands a little less than regular foam and becomes a bit harder.
https://www.biltema.se/bygg/kemikalier/lim/stenlim-2000029972