high quality plastic nstruction mats 48″x96″ seller High Density Polyethylene (HDPE) Sheet. This sheet can be heat formed, shaped, and welded to fabricate ducts, hoods, and much more. The material cannot be cemented, but it is easily welded with a plastic welder. 48″x96″ brown Ground nstruction mats 100 tons load capacity Aug 11, 2019