How to Make Precast Concrete Countertops

Precast Concrete Countertop | CHENG Concrete Exchange

Learn how to make concrete countertops with the most popular casting method – Precast. For the price of off-the-shelf materials, you can have a one-of-a-kind concrete countertop. Precasting a concrete countertop requires fine carpentry skills and elementary knowledge concrete. This guide walks you through building a form out of 3/4″ melamine and using Sakrete 5000 Plus bagged concrete along with CHENG’s Pro-Formula Concrete Countertop Mix to create professional grade concrete countertops.

Project Difficulty
Moderate

One: Make a Template

Precast Concrete Countertops | CHENG Concrete Exchange

Every countertop project begins with an accurate template.  Detailed notations, measurements, and planning will help your project flow as smoothly as possible.

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Two: Build the Mold

Projects destined for the polishing process are typically cast on melamine-coated particle board, an inexpensive, and readily available choice.

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Three: Mix the Concrete

Keep your costs low with Sakrete 5000 Plus concrete from your local home improvement center and CHENG Pro-Formula Concrete Countertop Mix.

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Four: Pour the Concrete

The concrete mix used in this pour was low-slump and required heavy-duty vibration. Add more water to your mix if you don’t have table vibrators like these.

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Five: Demold Countertop

After 5 days in the mold it’s time to remove the countertop but since the concrete is still young extra care must be taken to avoid problems.

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Six: Polish the Countertop

Precast Concrete Countertop | CHENG Concrete Exchange

Wet-polish with coarse diamond polishing pads that expose aggregate by cutting deep into the concrete, or use a finer pad for a more uniform finish.

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Seven: Seal the Countertop

Precast Concrete Countertop | CHENG Concrete Exchange

A good sealer is the best way to protect your countertop from unwanted signs of use and wear. Acidic foods like citrus and mustard will even etch concrete.

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Eight: Wax the Countertop

Precast Concrete Countertop | CHENG Concrete Exchange

Waxing a concrete countertop protects the sealer from the wear and abrasion of daily use. Pots and pans can take a toll, so wax regularly.

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