Cement-based sinks. Cast-in-place concrete sinks, each poured for a unique installation, provide ultimate flexibility to design the perfect sink for you and your bathroom. Green your concrete with recycled aggregates like glass, porcelain or coal fly ash (though skip the fly ash if coal isn't produced in your region, as the transportation
energy negates any green cred).Alternatively, Lithistone's ceramic cement uses approximately 20 to 40 percent less energy than Portland Cement, thereby reducing the sinks' carbon footprint. The remainder of Lithistone's matrix is natural mineral binder, different grades of sand and stone, recycled material and organic mineral pigments.