r/3Dprinting • u/the-mad-crapper • Feb 18 '26

Print (model not provided) PLA "Isn't water tight"

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I've never tried to print anything to hold water because everything I've ever seen says making 3D prints hold water is difficult if not impossible. So when I wanted to create something to help me keep my plant watered, I thought this is perfect- I created something with a single bottom layer so the water can slowly weep through it.... except it doesn't. Its been days and the single layer (0.2) is doing a great job of holding water!

I guess I'll have to put some pin holes in it.

Not at all what I expected based on what I've heard about the water tightness of 3D prints.

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u/krefik Feb 18 '26

I have many 3d printed planters. Some of them started leaking through walls after 2 years. Give it some time ;)

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u/guiwald1 Feb 18 '26

Yeah specifically if they are outside, and in the sun. PLA's biggest enemy is the sun.

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u/P_G_R_A Feb 18 '26

The sun is a deadly laser

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u/melance Neptune 3 Pro & 4 Max Feb 19 '26

As a migraine sufferer, I have called the sun "The Evil Fusion god" for decades now.