I don t like using poly on a countertop because if you need to refinish it down the line it s more difficult to remove.
How to make butcher block countertop waterproof. Countertop there are a variety of options for permanently sealing and waterproofing butcher block wood countertops commonly used in kitchens. A penetrating sealer soaks into a substrate such as wood concrete or stone and it seals the pores from the inside. I used it on our first butcher block and was so pleased with how it protected the wood. Polyurethane for butcher block countertops.
How to seal a butcher block countertop after a light sanding wipe away any dust using a tack cloth protect your hands with disposable rubber gloves use old cotton rags to wipe on the first coat and leave to dry about 6 hours. It s not a thick finish like polyurethane so keep that in mind. The more coats that you apply the shinier and more durable the butcher block coating will be. Brush it on in the direction of the butcher block wood grain for a gorgeous smooth finish.
The top must be made completely waterproof so water can t run down into the cabinet below. Allow the layer to dry thoroughly before applying a second coat. I should have just trusted what i know and love from the start. But here s the problem that i found with mineral oil.
The top and bottom front and end edges of the countertop are rounded using a 1 2 inch rounding bit in a router. Apply polyurethane in a thin even layer. Refill any cracks with glue allow to set then sand down smooth. You need to do it fairly regularly at first but then only about once a month after you ve gotten through several applications.
To seal butcher block with mineral oil you simply apply the mineral oil generously let it soak in and wipe off the excess.