HDPE sheets won’t break apart, crack, warp, peel, or fall apart when exposed to heat, chemicals, water, dirt, grease, oil, mold, mildew, fungus, germs, They’re made from high density polyethylene (HDPE), which has a lower coeficient of friction than regular plastic sheets. So they don’t stick together easily when They’re easy to cut, machine welded, or thermally formed to suit your requirements.