The Concrete Countertop Institute and Advanced Cement Technologies

Previously, metakaolin was available only in bulk, at a minimum in a pallet of 48 40-lb bags. This is enough for approximately 77 to 125 kitchens worth of concrete countertops.

The Institute recommends that 10 percent to 20 percent of the cement in a concrete countertop mix be replaced by metakaolin. This increases the compressive strength, density and workability, and decreases efflorescence and alkali-silica reaction. Metakaolin can interfere with acid stain reaction, however, so contractors should use caution when planning to create a countertop with an acid-stained look.

For more information about purchasing metakaolin by the bag, call (888) 386-7711 or visit the Concrete Countertop Institute. For information about PowerPozz by the pallet or truckload, contact Advanced Cement Technologies or (800) 595-7552.