I recently made an end grain cutting board. Unfortunately I didn't pay enough attention during the glue up and I have a couple of knots/knot holes that go through the board. The largest hole is roughly 0.5" in diameter on one side and 0.125" on the other. The board is ~1.25" thick.
Typically I pot these kinds of holes with super clear epoxy and occasionally add saw dust or something if I want to match the wood color. Given the application, I'm hesitant to use any old epoxy. I've read a lot of threads (including on this forum) about different food safe adhesives/finishes/etc. I've seen everything from
all epoxies are food safe once fully cured
never use epoxy
Other threads mention PVA glues, CA, and hide glue. I don't think any of those are good solutions for filling a hole as large as the one I'm describing.
It seems like FDA CFR 175.300 is the most stringent regulation for food safe coatings/adhesives. Wondering if there are any recommendations for a clear potting compound (doesn't have to be epoxy) that conforms with FDA CFR 175.300 and would be good for this application.