Ok so i was on the usplastics website, the HDPE that i was looking at is said to be rigid. Does this mean that the top AND bottom are rigid, one side is rigid, or is it just the kind of plastic? Im building a box so i need a smooth sheet.
its all rigid because its a plastic. if u mean like one side has ridges like bumps or something? then no its smooth on both sides. i ordered mine for usplastics.