is a ready to use liquidfor producing a more uniformlycohesive quality concrete to meetthe specifications and needs ofarchitects consulting engineers and contractors. CP-STAR replaces limein the mix and reduces the amount ofwater required to achieve the required workability, thus reducing the possibilityof drying shrinkage which can result in cracking and crazing. Minute bubblesof air entrained in the hardened mortar provide space for the expansion of water.