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Concrete Countertop Mix

Some contractors concoct their own proprietary mix designs for countertops, often born from much trial and error. But if you'd rather not play mad scientist, you can buy bagged mixes formulated exclusively for concrete countertops. Some incorporate high-performance admixtures, cement replacements, and special additives, such as fiber reinforcement, to improve strength and workability and minimize cracking. You can also buy mixes that are already pigmented. Read more in the Buyer's Guide to Concrete Countertop Mixes.

Buying tips: Ask about the yield of the mix per package so you buy the right amount for your project. And be sure to get a copy of the technical datasheet to get information on mixing procedures, setting and curing times, compressive strength, and other pertinent details. A good mix for concrete countertops should have a low water-cement ratio to prevent shrinkage cracks, provide sufficient compressive strength, be easy to work with, and result in an aesthetically pleasing surface, says Girard.

When choosing a mix, also think about any special effects you want to achieve. For example, Rhodes uses a mix that is thick enough to press into molds, so he can achieve his signature veined look. The mix is also white, so it takes colors easily, with white aggregates that polish to a high shine.

Review over 10 articles about concrete countertop mix designs by countertop expert Jeff Girard.

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