Lead Drywall: also referred to as Lead-Lined Sheetrock, Gyproc, Wallboard or Lead-Lined Gypsum Board. MarMetal's drywall is laminated with sheet lead that is designed to cover necessary surfaces or walls in a room requiring radiation shielding. It is affixed to surfaces or walls ensuring a continuous layer of sheet lead under the drywall to a specified height. It is used in new construction or shielding upgrades/renovations for P.E.T and other types of diagnostic imaging rooms. Lead Drywall Product Details MarMetal starts with a piece of sheet lead which meets or exceeds Federal Specifications QQ-L-201F, Grade C, ASTM B-749-03, and Standard Specification for lead and lead alloy strip, sheet, and plate products. The lead sheet is 99.9% pure or better of un-pierced virgin lead, free of dross, oxide inclusions, scale, laminations, blisters and cracks and is factory laminated to drywall.