Its been a week of putting a 1x2x3 board on it with weights and it still wants to curl up. I don’t want to use duct tape. I have to move it to mop so fastening it the floor is out. It is commercial grade and idk why it wont relax on the ends.
(This is a stock picture of the same mat.)


I’ve seen people use low profile corner weights on those before. They’re little triangular weights that slip over the corners. May not be legal in some areas due to being a tripping hazard.