"David Pearson" wrote in message
...

My Kingspanned ceiling has a gap or two (or a hundred), which
I could fill up nicely with expanding foam filler. Can anyone tell
me if it reacts with the Kingspan? I am worried that the solvent
in the filler might melt the Kingspan foam.


AFAIK, the release of the urethane foam from the can starts the
polymerisation reaction which is not reversible. The polyurethane foam
produced should be virtually identical to kingspan. I think KS is all PU.
So yes you should be okay.

--
Mike W