POLYCHEM® ULTRA-CR is a mildly alkaline liquid cleaner for the removal of polishing and buffing compounds such as rouge, gray stone, tripoli, white diamond, lime, etc. by immersion or ultrasonically. Its excellent cleaning ability removes soils such as oils, grease, stencil inks, metal working fluids, drawing compounds from steel, steel alloys, aluminum, aluminum alloys, galvanized steel, gold, silver and other precious metals, and other substrates.