Ultimaker PVA not sticking to PLA in Ultimaker 3D printers Posted January 12, 2017 I have already made some successful prints on my printer. If I print with only one material (PVA or PLA) I can print successfully. If I print with two materials and the PVA is glued to the plate it also prints correctly. However, I tried to make an impression where a support structure for the PLA was necessary, built in PVA. In this print the PVA does not glue correctly to the PLA, consequently it moves and becomes totally deformed. Does anyone have any idea what might be causing this behavior? The printer has less than a month.