YouTuber 3D prints pressure vessels and uses sealant

YouTuber LuisEngineering has tested a simple process to seal 3D-printed components for use as gas pressure vessels. The liquid sealant “Dichtol” was used for this. The principle is simple: the product penetrates the fine joints of the 3D print and seals them. The aim is to make the components gas-tight and able to withstand pressures of 8 bar and more.

LuisEngineering tested the limits of the method in an experiment. He printed out various pressure vessels with different wall thicknesses and sealed them with Dichtol. While wall thicknesses of 2 and 3 mm with Dichtol withstood the applied pressure without any problems, the 1 mm thin container failed – the walls burst under the high internal pressure. Obviously, such thin components are not structurally designed for permanent stress.

In a 24-hour test, another container was filled with gas overnight. In addition to air bubbles in the water bath, there was a slight leak here, which the YouTuber was able to repair with additional sealing coatings. Overall, the simple process can be used to achieve short-term, but not permanently reliable pressure tank compression. However, the method could certainly be practical for applications with short load cycles.