Which epoxy should I use for a wine cork bar top?

Cork bar tops are commonly done with UltraClear Bar & Table Top Epoxy. Glue the corks down, then seal coat them with Bar & Table Top Epoxy: brush a thin, even layer over every porous surface the pour will touch. Corks are very porous, so order enough epoxy for more than one seal coat and brush on additional seal coats every 4 to 6 hours as needed. A thorough seal keeps trapped air from releasing bubbles into the pour.

If the corks are laid on their side with roughly a 1/4" void to fill, pour a Bar & Table Top flood coat over them and let it self-level. It settles to 1/8", the standard bar top thickness. Add a second flood coat 4 to 6 hours later if you want more depth. The same approach works for a tray of whiskey corks with gaps: fill deeper gaps with UltraClear Deep Pour Epoxy, or just use Bar & Table Top Epoxy if the gaps are shallow.

For standing corks you want to see from the side, you need a deep pour. Seal coat the base and the corks with Bar & Table Top Epoxy, then 4 to 6 hours later pour Deep Pour Epoxy in 1" layers spaced 12 to 24 hours apart. Deep Pour is only for pours 1/4" or deeper. After it cures for 3 days, sand and clean it, then pour a final Bar & Table Top flood coat for a durable top coat.