Our Rainbow Cement Colors are universal pigments which can be used to tint any type of cement, mortar or gypsum product. They are completely compatible with one another for mixing so that an endless variety of shades can be achieved. Can be used to color Heat Stop II, Heat Stop 50 and Heat Cast 40 refractory products. Free from soluble salts and acids. Weather resistant, uniform, will not deteriorate in storage. Easily dispersed in water. Available in 6 different colors: bright red, deep cement brown, deep cement buff, lime proof black, lime proof brown, and lime proof red. Can be purchased in 1 lb. and 5 lb. containers. Shipping is FREE (contiguous US only).NOTE: Colors depicted may vary from one device to another so the actual color may be slightly different.