Testing Various Ways to Waterproof FDM Printed Parts
A recent study tested various methods to waterproof FDM printed parts, which are typically not water-tight due to layer gaps. The testing involved applying different coatings and using a modified vacuum chamber to simulate water pressure. The results showed that internal epoxy coating and two types of PU coatings were the most effective solutions.
- ▪FDM printers often have small gaps between layers that make them water-tight.
- ▪The study compared various waterproofing methods, including coatings and foam solutions.
- ▪Internal epoxy coating was found to be the most effective method for waterproofing.
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Testing Various Ways To Waterproof FDM Printed Parts No comments by: Maya Posch May 30, 2026 Title: Copy Short Link: Copy Along with layer lines, FDM printers are notorious for being neither air- nor water-tight due to the countless very small gaps between the layers. This is very unfortunate if you are trying to FDM print something that should keep water either inside or outside. Although a variety of potential solutions exist, it’s hard to easily compare them. Correspondingly [Half-Baked-Research] decided that the best approach here was to just try everything and pit them against each other.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hackaday.
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