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Build & Install Concrete Countertop

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19:56
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DIY Under Staircase Makeover | Closet to Pantry

What happens here

Build a mold for the concrete countertop using melamine, ensuring it is perfectly sealed and smooth. Degrease the mold with rubbing alcohol, apply a light coat of automotive wax, and then apply a liberal amount of silicone into all joints and edges, spreading it with a caulk tool to create desired bevels. Mix fiber-reinforced concrete (e.g., Quikrete Pro) to an oatmeal-like consistency, using approximately 3.5 80-lb bags for a typical counter. Pour the concrete into the mold, screed it level, and then trowel for a smooth finish. Allow the concrete to cure for at least three days. Once cured, remove the mold, fill any exposed air bubbles with a Portland cement slurry, wet sand the surface, and apply several coats of concrete sealer for protection against staining. Carefully transport and install the finished concrete countertop onto the base cabinets.

Goal: Construct a melamine mold, mix and pour fiber-reinforced concrete, cure, finish, and seal a custom concrete countertop for the bar area.

Tools and materials

  • Automotive Wax
  • Caulk Gun
  • Caulk Tool
  • Concrete Trowel
  • Gloves
  • Melamine Sheets
  • Respirator
  • Rubbing Alcohol
  • Safety Glasses
  • Screed Board
  • Concrete Sealer Unspecified
  • Portland Cement Quikrete
  • Silicone Sealant Unspecified
  • Water Unspecified

What they say

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alright so the countertop bill Dave today picked up a few supplies that be necessary for this job first part is we have the concrete itself some silicone and the cocking tool and the MVP the melamine I prepared the mold by degreasing with rubbing alcohol first applying a light coat of automotive acts and then applying a liberal amount of silicone into all the joints and edges and using a [ __ ] tool to spread it all out once a drive I remove the excess squeeze out silicone leaving only what's inside the center of the joints to be what bevels the edges of the concrete when it dries then it was ready to start mixing the concrete for the concrete I used about three and a half eighty pound bags of the quikrete pro fiber reinforced mix and started mixing it to a consistency of oatmeal and filled the mold one bag at a time typically when pouring concrete countertops you would lay down a metal mesh with the help to reinforce it but this product already has the fiber reinforcement so from my research I do not need it now check back in a few months and I'll tell you exactly how it's holding up but I feel pretty confident about this after the concrete cured for three days I remove the molds and flip the concrete countertop over - what now will be its top side filled any exposed air bubbles with a little bit of Portland cement once that dried I lightly wet sanded it and applied a few coats of sealer to protect the countertop from staining for

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