Skip to content


The prints you get out of a FFF printer are highly unlikely to be waterproof. If they are, it's mostly an accident. While there won't be a huge amount of leakage, there will likely be some. For most uses, this doesn't matter, but it could matter if, for example, you're printing a lovely vase. You need it to hold water, or the flowers will die.

To waterproof, you've got a few options:

  • Epoxy resin coating. There is a Youtube video on the process.
  • Wax (note, Gulf Wax melts at approximately 130F)
  • Acetone (ABS, ASA, etc. not PLA/PETG)
  • Silicone conformal coating (like from MG Chemicals)
  • Clear spray paint, like Rustoleum Universal Clear


Show how to use a few of these, ideally with step-by-step instructions.

Comments or Questions?

If you have any comments, questions, or topics you'd like to see covered, please feel free to either reach out to me on Mastodon (link below) or open an issue on Github.