You will need to add the following (available at your local hardware store) to your CHENG Pro-Formula Mix and NeoMix Original Products to yield a concrete countertop:
6 bags of 60-pound sacked concrete (5000 psi) OR 4.5 bags of 80-pound sacked concrete (5000 psi) for every 3 cu. ft. of countertop.
DO NOT USE any air-entrained bagged mixes.
Review the CHENG Pro-Formula Countertop Process.