I agree with @Aviation Enjoyer. An alternative would be to use some heavy objects to keep the mat from curling up at the corners. I’ve seen people use Gemini200 boxes for that, but something like a weighty book or textbook would work fine.
I mount it on PVC Board, using the double-sided tape, then put some heavy books on top for a couple days. There are no obvious bumps or uneven surfaces. It still looks great after several years of use.