The outdoor material — UV-stable and weatherproof
ASA 3D printing
ASA (acrylonitrile styrene acrylate) is the answer to the question "what should an outdoor part be printed in?". It is ABS re-engineered for weather: the same useful heat tolerance and toughness, with an acrylic component that shrugs off UV instead of chalking under it. Gutter brackets, aerial mounts, hinge covers and garden fittings that would be dust in PLA after a summer keep their colour and strength in ASA for years.
- Softens from
- ~95–100°C
- Character
- Tough, UV-stable
- Outdoors
- Yes — this is its job
- Relative cost
- Medium
Where ASA wins
- Genuinely UV-stable: colour and mechanical properties hold up in sunlight
- Weather-resistant across British conditions — rain, frost cycles, summer heat
- Heat tolerance on par with ABS (~95°C+), so black parts in full sun stay solid
- Matte surface finish that hides layer lines better than glossier materials
Where it lets you down
- The same printing demands as ABS: enclosed chamber, warping risk on large flat parts
- Costs more than PETG, so it is wasted on indoor parts
- Slightly less impact-tough than ABS
- Colour range is narrower — mostly the sensible outdoor colours
What gets printed in ASA
- Gutter, downpipe, aerial and satellite-dish brackets
- Vehicle exterior parts: trim clips, covers, mirror surrounds
- Garden and smallholding fittings: latches, hinge covers, feeder parts
- Outdoor signage, housings for sensors and cameras
When to choose something else
Indoors, ASA is money spent on UV stability nothing will test — use PETG or PLA. For sustained loads or bearing surfaces, nylon is stronger. For an outdoor part that must also flex (a strap, a boot, a seal), TPU handles weather surprisingly well and bends by design.
How it prints — and why that shows in the price
Like ABS, ASA wants an enclosed heated machine and thoughtful orientation, and big flat panels carry warping risk we will flag rather than hide. Where an outdoor part can be split into smaller pieces, it often prints better and cheaper as an assembly.
Worth reading next
Get a part quoted in ASA
Upload a file for a guide price in seconds — or describe the part and where it lives, and we will confirm the material choice with the estimate.