12/7/2023 0 Comments Concrete overlay counter![]() follow the manufacturer's directions for mixing and useģ. I'd never used concrete before so I made some mistakes you can learn from - though it all turned out fine in the end.ġ. It does set VERY quickly so I recommend buying the additive that extends setting time so you have more time to work with it. Personally I would just sand/scuff up the laminate and use the type of concrete made for repairs to horizontal and vertical surfaces (it usually contains polymers that make it stronger and bond to substrate more easily).īasically I build molds using 1x4's, sprayed them with cooking spray to prevent cement adhering, then mixed up the concrete I used "Cement All Rapid Set" sold at Home Depot and Lowes. You could cover MDF or particle board with roofing paper to prevent moisture intrusion if you need to remove the laminate. Where I switched out my sink, I had to add in a plywood section since the old sink was wider, so I covered that with waterproof building paper (used for roofing etc). ![]() I poured the concrete right over the ceramic tile countertop which was already waterproof. If the laminate is damaged or easy to remove by all means removed it but I think you'd need to add a waterproof layer over the MDF layer since concrete is porous, you'd get moisture causing swelling. You don't need to remove your laminate, just sand it to scuff it up so the concrete can bond better, and use a repair-grade concrete that is meant to bond to things.
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