Surelock has recently had its formula updated making it the most virbant concrete dye Ameripolish has ever produced. It is a versatile colorant for polished concrete that mixes with water or acetone. SureLock is to be applied just before densifying with 3D HS or HSL helping the color penetrate and chemically bond to the concrete. The pre-dissolved concentrate liquid is fast and easy to use. The formula includes UV stabilizers to resist fading as well as a penetrating agent to eliminate further mixing and develop deep, rich color even on hard, dense concrete.