Cheng Concrete Countertop Pro-Formula Mix - Platinum CHENG Concrete Countertop Pro-Formula is designed for Precast Concrete Countertops. No guesswork  just add sacked concrete mix and water High-quality pigments provide vibrant, stable, long-lasting colors Special admixture modifiers deliver stronger, smoother counter top surfaces Proven expertise  Fu-Tung Cheng's 20+ years experience