ABS / ASA 3D printing
ABS and ASA are for parts that live somewhere rough — a hot car, a sunny balcony, the inside of a warm appliance. They take more work to print, and I take that work on so the part lasts.
What ABS and ASA are
ABS is the hard plastic most household gadgets are built from. Think of a vacuum cleaner body, a power tool case, or a kitchen appliance shell. ASA is its close sibling, made to stand up to sunlight.
Both need a hot, enclosed printer to come out right, so they cost a bit more than PLA or PETG. What you get for it is a part that keeps its shape where the others give up.
What I'd print in ABS / ASA
Anything for the inside of a car: phone and dash-cam mounts, clips, vent parts, trim pieces, cup holder inserts.
Parts that sit near heat or outside all year: housings for electronics, lamp parts, garden and balcony fittings, mailbox and gate parts, and brackets for things mounted on a wall outside.
Where ABS / ASA falls short
It's tough, but it isn't the best at fine detail, and big flat parts can pull slightly out of shape as they cool. For a display model or a figure, PLA gives a cleaner result.
If the part never sees heat or strong sun, you're usually paying for something you don't need. PETG covers most tough indoor parts for less.
For something soft or grippy, like a bumper or a foot pad, choose TPU instead.
Finish, heat and outdoor use
It comes out with a plain, slightly matte surface, like most hard plastic gadgets. It sands well and takes glue easily, so it's a good base if you want to smooth or paint a part.
Of my hard plastics, it copes best with heat. A part on a dashboard should keep its shape through a hot summer.
For outdoor parts, ASA is the one you want: it keeps its color and doesn't turn brittle in the sun nearly as quickly as the other plastics.
ABS / ASA
How it holds up
- white
- gray
Parts I've printed in it
A sunglasses holder that clips onto a car sun visor — made from heat- and sun-resistant plastic so it won't warp in a hot cabin.
A battery case for a DIY VESC Onewheel build — the premium choice made from ASA plastic, built to handle intense sun and outdoor weather without breaking a sweat.
Questions people ask
- Will ASA survive a summer outdoors?
- Yes. ASA is made for exactly that — sunlight, rain and frost, year after year. It holds its color and toughness far longer than PLA or PETG in full sun.
- Can I use it for a part on my car dashboard?
- Yes, this is the material I'd pick for that. Unlike PLA and PETG, it stays firm in a parked car on a hot day.
- Why does ABS / ASA cost more than PLA?
- It needs a hotter, enclosed printer that uses more power, and it's fussier to get right. The price reflects that real cost, nothing more. If your part doesn't need the heat or sun resistance, PETG or PLA will do the job for less.
- What's the difference between ABS and ASA?
- They're close siblings and feel much the same in the hand. ASA is the one made to resist sunlight, so it keeps its color and doesn't go brittle outdoors. For a part that lives indoors or in a car, both do the job.