Can I cut or drill cured epoxy, or should I cut holes first?

Make every cut and hole before you apply the epoxy. Cured epoxy should not be cut or drilled into; doing so risks cracking it. That includes the sink opening in a butcher block or countertop: cut the hole first, then seal coat and flood coat with UltraClear Bar & Table Top Epoxy.

What you can do after curing is sand, rout and plane the epoxy. Once it has fully cured for 3 days, you can run a router sled over it or sand it as needed. If you need a channel in the surface, such as a T-track slot in a workbench, it is still best to rout the channel first, block it off with a temporary dam, and then apply the epoxy. The epoxy should be the final step in finishing a surface.

For CNC machining, we do not have feeds-and-speeds documentation for either product. Cured epoxy is a hard thermoset plastic, and the right settings vary with your setup and the finish you want, so start conservatively and test on a scrap piece first. Our available resources are the product instructions and the Safety Data Sheet in the FAQs on our website.