Can You 3D Print Waterproof or Watertight Parts?
1. Yes — With the Right Technology
Achieving watertight 3D prints is possible but requires specific technologies and design considerations.
2. Best Technologies for Watertight Parts
SLA (Stereolithography) — Best option. Parts are solid resin with no layer gaps. Naturally watertight without additional treatment. Available on both standard SLA (Form 3L) and Industrial SLA for larger parts.
MJF — Parts are slightly porous by default but can be sealed with post-processing (epoxy coating or dyeing process).
3. Design Tips for Watertight Parts
Minimum wall thickness: 0.8mm+, but 2mm+ recommended for water-holding applications
Avoid thin features that may have micro-gaps
Design drain holes if the part will be hollow
Specify watertight requirement in your order notes so our team optimizes settings
4. Post-Processing Options
Epoxy coating — Most reliable seal for any technology
Dyeing — MJF dyeing process partially seals surface pores
5. Limitations
FDM parts are not recommended for watertight applications due to layer gaps
No technology guarantees pressure-vessel-grade sealing without post-processing
UV exposure can degrade SLA parts over time, potentially compromising seal
For enclosures, housings, or any application requiring water resistance, tell us about your project and we’ll recommend the best approach.
Makelab offers professional 3D printing services with a full range of materials and technologies. Based in Brooklyn, NYC, we help designers and engineers choose the right material for every project. Explore our materials or get an instant quote.