Digital BW, The Print

I am about fed up with the warping that happens when dry mounting on 
mount board. I was wondering if any one has been using a product 
called Ultra Mount. I have seen a sample of this stuff. It looks like 
it would be the answer to no warping using mount board and no dents 
with foam core. It is tough and light. I am now searching for the 
least expensive outlet for it. Anyone with any ideas?