Poly Hyde urethane film will prevent marring die marks on a wide variety materials including stainless steel, painted metal, aluminum and polished materials. Save Time and Money By Avoiding Re-Polishing and Buying New Blanks! Simply cut to length, lay it on top of the bottom die and secure one side with Double-faced Clamping Tape. Poly Hyde is perfect for metalworking shops, fabrication centers or any industrial application where additional marks and scratches are not desired.