Butcher Block Pro Tips: Butcher Block Countertop Underside

What You Need To Know About the Underside of the Butcher Block Before Installing
The underside of the butcher block must be finished in order to ensure the board doesn't dry out or take on moisture.
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What should I finish the bottom of a butcher block counter with before install? I’ve been using a food-safe product on the top but have noticed some warping. We are getting ready to install the block on its forever home but I want to make sure I seal the bottom properly first.