PETG is polyethylene terephthalate glycol. PETG is a copolyester with high clarity. PETG sheets are very durable, dimensionally stabile and have a high impact resistance. PETG sheets are stronger than acrylic and less expensive than polycarbonate. PETG is commonly used for vacuum forming, signs and pop displays. PETG can be cut, machined, bent, fabricated and bonded.