Outdoor 4WD parts have a tough life. They see sun, heat, vibration, dust, mud and the occasional knock, so the filament matters as much as the design. A part that looks strong on the bench can still warp, soften, fade or become brittle after months in the Australian sun.
At AFS Offroad, we use ASA-GF for our surface mounts because it gives us the combination of weather resistance, stiffness and dimensional stability that outdoor touring parts need. This guide explains why, and how ASA-GF compares with the common 3D-printing alternatives.
What an outdoor 4WD mount needs
A reliable exterior mount needs more than a high strength number on a data sheet. It needs to:
- Handle long-term UV exposure without rapidly fading or becoming brittle
- Stay rigid so connector housings and panels sit neatly and securely
- Hold its shape in heat, including a hot vehicle or direct sun
- Resist vibration, knocks and general touring wear
- Print accurately enough for consistent fitment
That is why we start with ASA rather than choosing a filament on raw tensile strength alone.
Why AFS Offroad uses ASA-GF
ASA-GF is ASA reinforced with chopped glass fibre. The ASA base offers excellent UV and weather resistance, while the glass fibre increases stiffness and helps reduce warping and shrinkage. The result is a durable, matte-finish material that is well suited to outdoor brackets, mounts and panels.
For our Anderson plug surface mounts and other surface mounts, ASA-GF provides the balance we want: it is rigid enough to hold its shape, stable enough for consistent fitment and durable enough for outdoor touring conditions.
It is not the only capable material. It is simply the material that best matches the requirements of our own products.
ASA-GF compared with common 3D-printing filaments
| Material | Where it works well | Outdoor 4WD trade-off |
|---|---|---|
| ASA-GF | Rigid, stable mounts, brackets and panels exposed to sun and weather | Needs a hardened steel nozzle and an enclosed printer for best results |
| Plain ASA | Tough, weather-resistant general outdoor parts | Less stiff and more prone to warping than ASA-GF on large flat parts |
| ASA-CF | Parts where high stiffness, low warp and a premium matte-black finish are priorities | Properties and suitability vary by the specific formulation and printed part |
| PETG | Easy-to-print general brackets and enclosures | Lower heat resistance can make it less suitable for hot vehicles or direct sun |
| ABS | Indoor or protected functional parts | Less suitable for long-term UV exposure than ASA |
| PLA | Prototypes and low-temperature indoor parts | Can soften in heat and is not a good choice for demanding outdoor use |
| PET-CF | High-strength and higher-temperature structural parts | Assess the exact material’s weather performance for the intended use |
| PA-CF / nylon | High-load, high-temperature parts | Absorbs moisture and may need protection for long-term outdoor exposure |
| PC | High-impact and high-temperature parts | May yellow or degrade in sunlight unless the specific grade is UV stabilised |
The comparison is not about declaring one filament universally best. It is about matching the material to the real job. For a visible mount that spends its life on a canopy, tray or trailer, ASA-GF is a strong all-round choice because it combines outdoor durability with rigidity and good dimensional accuracy.
Why not choose the strongest filament on paper?
Higher tensile strength or heat resistance does not automatically make a filament the best choice for an outdoor mount. A part can be extremely strong yet still be less suitable if it warps during printing, changes appearance in the sun, absorbs moisture or requires coating to hold up outdoors.
ASA-GF is not designed to win every individual specification. It is chosen because it performs well across the set of requirements that matter for the parts we make: weather resistance, stiffness, fitment, finish and practical production.
Printing ASA-GF successfully
Like all fibre-reinforced filaments, ASA-GF needs the right setup. For consistent results:
- Use a hardened steel nozzle. The glass fibre will wear a standard brass nozzle quickly.
- Print in an enclosure. A warm, draught-free chamber helps reduce warping and improves layer bonding.
- Dry the filament when needed. Moisture can cause stringing and weak layers, so store it with desiccant and follow the filament supplier’s drying guidance.
- Use the supplier’s temperature settings. Different ASA-GF formulations can require different nozzle, bed and chamber temperatures.
- Allow for the finished part. Wall thickness, print orientation, infill and fastener locations all affect the final result.
Choosing the right material for your part
Before selecting a filament, ask:
- Will the part live in direct sun or a hot vehicle?
- Does it need to stay especially rigid or dimensionally accurate?
- Will it see continuous vibration, regular handling or impact?
- Is a matte, production-style finish important?
- Can the part be painted, coated or kept out of direct weather?
For the durable outdoor mounts we build at AFS Offroad, the answer leads us to ASA-GF.
Final word
ASA-GF is our material of choice for outdoor 4WD surface mounts because it brings together UV stability, stiffness, dimensional accuracy and a durable matte finish. Plain ASA, ASA-CF, PETG, ABS, PLA, PET-CF, PA-CF and PC all have useful roles, but each involves a different trade-off.
Every AFS Offroad surface mount is printed in Australia from durable ASA-GF and built for the sun, heat and corrugations of real touring.
Shop AFS Offroad Surface Mounts
Material properties vary by brand, colour, print orientation and settings. Always check the technical data sheet for the specific filament you use and test parts for their intended application.