How To Seal Butcher Block Countertops. Pour your sealer into a plastic cup or whatever container you want to use to hold the sealer while applying it I strongly recommend something you can throw awayplastic cup Gladware etc. Polyurethane for butcher block countertops.
Do not seal butcher block wood has an enzyme that kills bacteria and when you seal it that does not work. I think staining would be okay and just oiling is all you need and reoil so my only concern would be with staining is that if somethingif it gets marked a light sand and reoil. A penetrating sealer soaks into a substrate such as wood concrete or stone and it seals the pores from the inside.
It did soak into the butcher block very nicely and there was a big difference when finished compared to the unfinished birch.
A penetrating sealer soaks into a substrate such as wood concrete or stone and it seals the pores from the inside. They are both applied the same way. Walnut oil will give it a darker color. Polyurethane is a liquid coating that dries into a plastic film and is great for sealing the countertop but then theres a layer of plastic between you and your pretty new wood.
