Support

How to Choose Support Filament for 3D Printing

Support filament is used to print temporary structures beneath overhangs, bridges and other features that cannot be printed reliably without additional support.

Unlike conventional supports printed from the same material as the model, dedicated support filament can be selected for easier removal, cleaner support interfaces and complex internal geometry.

The best support material depends on your model filament, printer configuration, supported temperatures and removal method.

Compare PVA, HIPS and AquaSol Support Filament

Always verify that your specific model filament and support filament can be printed together successfully. Similar printing temperatures alone do not guarantee good material compatibility.

PVA Water-Soluble Support Filament

PVA, or Polyvinyl Alcohol, is a water-soluble 3D printing material commonly used for support structures in compatible PLA multi-material printing workflows.

After printing, PVA supports can be dissolved in water, reducing the need to physically break away supports from delicate or hard-to-reach features.

When Should You Use PVA?

• Complex PLA models with difficult overhangs
• Models containing internal channels or cavities
• Detailed architectural and decorative pieces
• Organic shapes and curved surfaces
• Prints where support-interface finish is important

PVA absorbs moisture readily. Keep unused filament sealed with desiccant and follow the product's handling and drying recommendations.

Shop Spool3D PVA Support Filament →

HIPS Support Filament for ABS Printing

HIPS stands for High Impact Polystyrene. It is a thermoplastic commonly used as a support material alongside compatible ABS printing workflows.

One of the main advantages of HIPS is its solubility in d-limonene, allowing suitable support structures to be removed chemically.

Benefits of HIPS Supports

• Useful for suitable ABS printing applications
• Supports complex overhangs and geometry
• Can reduce difficult mechanical support removal
• May be used with dual-extruder systems
• Can also be printed as a standalone thermoplastic

HIPS and ABS generally benefit from stable printing temperatures and a controlled environment. Confirm that your printer and slicer support the required multi-material workflow.

When removing HIPS with d-limonene, follow the solvent manufacturer's handling, ventilation, compatibility and disposal instructions.

Shop Spool3D HIPS Filament →

AquaSol Specialty Dissolvable Support Filament

AquaSol is a specialty soluble support material intended for compatible engineering filaments and demanding multi-material printing applications.

It can be useful when ordinary PVA or HIPS is not appropriate for the model material or required printing conditions.

Shop AquaSol Support Filament →

Benefits of Dissolvable Support Filament

Using Support Filament with Multi-Material Printers

Dedicated support filament generally requires a compatible printer and material-changing system, such as a dual-extruder printer, IDEX printer, toolchanger or supported multi-material filament system.

Not every automatic filament system supports every soluble material. Compatibility can depend on filament moisture sensitivity, brittleness, material-changing hardware, temperature limitations and slicer support.

Support Interface vs. Complete Support Structure

Some slicers allow the main filament to form most of the support structure while a dedicated support material is used only for the layers touching the printed model.

This can reduce soluble-filament consumption and unnecessary material changes while preserving the benefits of a compatible support interface.

Tips for Printing with Support Filament

• Keep filament dry: Moisture-sensitive materials such as PVA can become difficult to print after absorbing moisture.
• Check material compatibility: Confirm that model and support materials can be processed together.
• Calibrate material changes: Adjust purge amounts and changeover settings to reduce contamination.
• Optimize support interfaces: Use appropriate support density, interface spacing and contact settings.
• Check bed adhesion: Select a suitable build surface for the materials involved.
• Follow dissolving instructions: Never assume different support filaments use the same dissolving liquid.
• Verify finished-part compatibility: Ensure the model can tolerate the specified removal temperature and chemical exposure.

Breakaway vs. Dissolvable Supports

Conventional breakaway supports are often the most economical choice when support structures are easy to access. They can work well for general printing without requiring separate support filament or a dissolution process.

Dissolvable supports are particularly valuable when geometry is difficult to reach, delicate surfaces could be damaged by mechanical removal, or clean support interfaces are important.

Consider both the material cost and the additional printing and post-processing time when choosing the appropriate support method.

Frequently Asked Questions

What is the best support filament for PLA?

PVA is a common water-soluble support option for compatible PLA multi-material printing systems. The exact choice depends on your printer, filament formulations and slicer capabilities.

What support filament works with ABS?

HIPS is commonly paired with ABS because the materials can have compatible printing characteristics. HIPS supports may be removed using d-limonene when the printed model can tolerate the removal process.

Does all dissolvable filament dissolve in water?

No. PVA is water-soluble, while HIPS requires a suitable solvent such as d-limonene. AquaSol requires its specified Sol-120 dissolving solution.

Can I use support filament in a Bambu Lab AMS?

Compatibility depends on the specific support material, AMS model, printer and supported feeding workflow. Not all soluble materials are suitable for automatic filament systems. Check the equipment and material manufacturers' guidance before loading.

Do I need support filament for every print?

No. Many models print successfully without supports, while others only require conventional breakaway supports. Dedicated support material is most useful for difficult geometry or demanding surface-finish requirements.

Explore Related 3D Printing Materials

Choose your model filament based on the mechanical properties, printing conditions and support compatibility required for your project.

Buy Support Filament Online in Canada

Shop PVA, HIPS and AquaSol 1.75mm support 3D printer filament at Spool3D in Calgary, Alberta.

Whether you are printing complex prototypes, internal passages, detailed models or professional multi-material components, explore the available support materials above to find a suitable option for your printer and project.

Spool3D offers local pickup in Calgary and shipping across Canada.