DIY Concrete Countertop

You pour reinforced concrete into a custom mold, allow it to harden, and then remove and finish the slab. Polishing and sealing create the smooth surface commonly used for a modern kitchen or bar countertop.

Yes, reinforcement helps reduce the risk of cracking in a thin countertop slab. The mold, reinforcement, support structure, and concrete mix must all be planned for the finished slab's weight.

Concrete often needs around 28 days to reach its design strength, although the surface may be workable earlier. The exact curing time depends on the mix, thickness, temperature, and manufacturer instructions.

Concrete is porous, so an appropriate sealer helps protect it from water, food stains, and everyday kitchen spills. The chosen sealer should be suitable for countertop use and compatible with food-contact requirements.