Bambu Lab PVA

Bambu Lab PVA Water-Soluble Support Filament

PVA (polyvinyl alcohol) isn't a filament you print models from — it's the filament that makes difficult models possible. Printed as support material alongside PLA or PETG, it holds up overhangs, bridges, internal channels and captive moving parts, then dissolves completely in water when the print comes off the plate. No flush cutters, no scarred surfaces, no giving up on a geometry because you can't reach inside it to clean it up.

It's the natural next step for makers running a multi-material setup: articulated models and print-in-place mechanisms, drone and RC parts with enclosed cavities, engineering prototypes with internal cooling channels, lattice and organic shapes, and school or workshop projects where hand-removing supports isn't practical. Bambu Lab embeds all printing parameters in the spool's RFID tag, so an AMS or AMS lite reads the profile automatically — but any 1.75mm printer with multi-material capability can run it with the settings below.

Key Features

Dissolves in water
Smooth support interface
Recommended for PLA & PETG
AMS & AMS lite compatible
RFID auto-settings
±0.03mm tolerance
Reusable high-temp spool

• Clean release, strong bond. The support interface sticks well enough to hold geometry mid-print, then washes away without leaving the rough, pitted underside you get from breakaway supports.
• Reaches where tools can't. Enclosed voids, threaded holes, hinges and lattices all clean up in a water bath rather than under a hobby knife.
• Consistent feeding. 1.75mm ±0.03mm on a high-temperature reusable spool keeps AMS feeding predictable across long multi-material jobs.

Print Settings

• Nozzle temperature: 220–250°C
• Bed temperature: 35–45°C (use glue stick on the plate)
• Print speed: under 200 mm/s
• Cooling fan: on
• Drying before use: 80°C for 12 hours in a blast drying oven or filament dryer
• Use with: PLA and PETG models — set PVA as the support and support-interface material in your slicer

Specifications

Available Colours

Clear (66400)

PVA is a support material, so it's supplied in a single natural clear shade — the finished look of your part comes from the PLA or PETG you pair it with.

Practical Tips

Keep it bone dry. PVA is the most moisture-hungry filament most people will ever run — it pulls water straight out of humid Australian air, and damp PVA jams, bubbles and strings badly. Dry it at 80°C for 12 hours before the first print, keep it in a sealed box with fresh desiccant between jobs, and run it from a dry AMS or a heated dryer rather than leaving it on an open shelf overnight.

Dissolving works best with patience. Soak the finished print in warm (not boiling) water and let it sit — a few hours for thin interface layers, overnight for dense internal supports. Gently agitating the water or swapping it once speeds things up. Don't pour heavily saturated PVA water down the drain in a hard-water area; let it dilute well or dispose of it with your general waste water.