Its this stuff Jess, not pink grip in a tube.
https://www.everbuild.co.uk/product/pinkgrip-dryfix-fr/
I've used foam to patch in PB and it's brilliant. Wouldn't use it to stick loads of boards, but for one or two, dont see the problem.
Insulated board can be a pain though, and def wouldn't use it seen as he's mentioned 130 boards. Stick with known quantities.