Don't count on it. I have tried about every possible thing I could think of. I have used banner hem tape along the entire edges and put granite tiles on it over the weekend. Flat as a pancake for about a week. Then the tape started popping. Removed all the tape, found a good glue that will glue different materials together. Glued it around the edges and clamped it all while it dried. Came back, dead flat. Excellent. About 3 weeks later, edges popping up.
I've tried heat, weight, heat and weight, upside down, right side up, hem tape, glue, heat, more heat, even more heat, rolling it up backwards, rolling it up backwards and heating it up.
If you figure it out, let me know. For me, I just stay away from the corners of my table because I can't get them to stay down for anything.