Opti-Mix Cement Colourant is a one-shot cement colourant that enables accurate colour matching and consistency between different batches of mortar.  It has a fast colouring formulation, a controlled dosage, a consistent mix design and is easy to use and less messy than powder. It produces no waste and no more colour differences in mortar batches. 1 litre is equivalent to 5 litres of standard product.