Dark is an additive that darkens the shade of gray color of Rapid Set® cement products. Add up to 4 packets maximum per 50-lb to 70-lb bag by dry blending Dark uniformly into Rapid Set cement products. Dark may be used with all other Rapid Set® products.
By adding DARK from the Concrete Pharmacy, your cement, concrete, mortar, plaster and grout mixtures will become darker in color. Use increased quantities of DARK to match new concrete to existing concrete or to produce a custom-color concrete. DARK is effective with virtually all types of cement mixtures and may be used with all additives in the Concrete Pharmacy.