SAFETY DATA SHEET - USG. SAFETY DATA SHEET 1. Identification Product identifier Hydro-Stone® Gypsum Cements Other means of identification SDS number 52000000012 Hydro-Stone® TB Gypsum Cement, Hydro-Stone® LF, Hydro-Stone® DL, Hydro-Stone® HD Cement, Hydro-Stone® SDCT, Hydro-Stone® Super Fast Set, Hydro-Stone® ME Special Gypsum Cement, Hydro-Stone® DL Plus Smoke