We have an old buffet that I converted into a vanity for use in the bathroom. To make the top water resistant, we used a deck sealer. Whether or not that was the best choice, the deed is done.

The plumbers we hired cemented the sink to the top of the vanity using a silicone caulk, however, it appears not to have worked. The sink slides freely on the top of the vanity.

What kind of caulk will adhere to the deck-sealed wood?

  • 1
    what sort of deck sealer did you use? pick something compatible with that.
    – Jasen
    Commented May 7, 2023 at 8:02
  • Is your "deck sealer" an oil of some sort? Can you share the exact brand & product with us?
    – brhans
    Commented May 7, 2023 at 13:18
  • Oh boy. My wife bought and applied it. Unfortunately, I don't think we have the bottle to check, but I'll keep looking.
    – hepcat72
    Commented May 7, 2023 at 16:50
  • Found it. It's Behr Transparent Waterproofing wood finish.
    – hepcat72
    Commented May 7, 2023 at 17:07

1 Answer 1


A polyester caulk like Vulkem will work. It is totally waterproof and paintable when dry,if that is a need. It does take a day or 2 to dry because it is not water based. Mineral spirits are needed for clean up, but that is the only bad smell.

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