Has anyone here used PU foam or other insulation that can be used to fill wall cavities etc? Results, price, etc...? What supplier did you use, has the foam it retained its original volume, did you test if it is flame proof etc?

I'm shopping around for PU foam but have trouble even getting quotes from the suppliers that I contacted. And the single sample I got from one supplier burnt better than gasoline when I put a lit match next to it.

You are lucky to have cavity walls!!!!!!!!

PU foam is available from Huntsman, they have an office in Samut Prakan. The link is on the site to the Thai office.

Huntsman PU construction products

You could also use Vermiculite but you would have to hunt for it, I know it's available here as I have used some that someone else got.