PET coated MDF. PET stands for “polyethylene terephthalate” and MDF for ‘’ Medium Density Fiberboard’’. PET is strong, impact and scratch-resistant, an excellent water and moisture barrier material, plastic bottles made from PET are widely used for soft drinks. The surface is made of PET. The PET surface is applied to MDF with high-tech German technology under high heat and pressure with PUR glue.