I bought some Polypipe GFC100 Gap Filling Cement to stick some poorly fitting PVC pipe fittings together. I tested some on PLA printed parts and it makes a very strong bond.
I used it to stick these two parts together: -
It is a part to allow me to mount a vent that would normally go through a ceiling, on the surface of the ceiling. I am building a ventilation system for my garage workshop.
I made it from two separate parts to allow me to print it without support and a giving a smooth pipe so that I can clamp a flexible aluminium pipe over it and make a good seal.
Nophead, I've been using this stuff, EMA Model Supplies Plastic Weld, to assemble PLA components for a long time, I get mine from Howes Models in Oxford. Because it has low viscosity you can get it into gaps between components with a small paintbrush. The PVC pipe joining goo in a tube or bottle is so thick I find its much harder to control, but YMMV. Funnily enough, I've just made ventilation components for my bathroom to link 125mm duct to a high powered 100mm extractor, not the wimpy ones normally found, its controlled by a hard wired humidity sensor.
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