I'm working with a slab of black walnut that we're planning to use as a tabletop in a restaurant. It's crucial since it will be sprayed with sanitizer several times each day. I've heard mixed advice about finishes—tung oil, polyurethane, and epoxy seem to come up a lot. Would any of these finishes realistically stand up to such regular sanitizing, or is epoxy the better way to go? I did try using 2-part epoxy on a sample, but it darkened the wood more than I expected and I'm looking for something that would keep a lighter finish. Any thoughts or recommendations?
3 Answers
2K poly, conversion varnish, or even epoxy are all solid choices for restaurant tables. They'll all handle those sanitizing conditions pretty well. I’ve heard good things about Target Coatings’ water-based conversion varnish (EM8000cv) too, as it won’t darken the wood too much. Just a heads up, quality polyurethane does take time to cure, like 3-4 weeks, which might not fit your timeline if you're in a rush.
You could also go for a 2K polyurethane if you're looking for a water-based option. It's durable and stands up well against commercial sanitizers, just make sure to allow it to cure fully. It’s worth it!
For a restaurant tabletop like yours, I'd recommend using a conversion varnish. I've had a surface treated with it in a bar for over 15 years and it still looks great! It’s tough and holds up really well against the daily wear and tear, including frequent cleaning with sanitizers.

Whoa, that's impressive durability!