Collection: ASA Range

Years rather than the weeks or months you would get from PLA. ASA is built for sustained outdoor exposure, which is why it is used for automotive exterior trim and outdoor housings. We do not publish a rated service life because it depends on part geometry, colour and how much direct sun the part takes, but ASA is the material to reach for when something needs to still be working next summer.

This is ASA's main advantage. It holds its colour and surface finish under UV where ABS yellows, chalks and goes brittle, and where PLA fails quickly. The UV stability comes from the polymer itself rather than a surface treatment, so it does not wear off and it survives sanding or drilling into the part.

ASA matches ABS on heat resistance, holding its shape to roughly 100°C. For comparison, PLA starts to soften around 60°C, which is why PLA parts droop in a parked car. That heat tolerance is what makes ASA usable for engine bay adjacent parts, roof mounts and anything sitting in full sun.

It depends what you mean by stronger. PLA is stiffer and can test higher on raw tensile numbers, but it is brittle: it snaps rather than bends. ASA is far tougher, absorbing impact instead of cracking, and it keeps working at temperatures and UV levels that destroy PLA. For a functional or outdoor part ASA wins comfortably. For a display model on a shelf, PLA is easier and perfectly adequate.

Yes, if the spool has been open for a while. Dry at 70 to 80°C for 4 to 6 hours. Damp ASA gives you stringing, poor layer bonding and a rough surface, and since ASA parts are usually functional, weak layers matter more here than they would on a decorative print. Store it sealed with desiccant between prints.

ASA shrinks as it cools, so any temperature change across the part pulls the corners up. The fixes are all about keeping conditions steady: print in a closed enclosure, keep the part cooling fan off or very low, use a brim on parts with sharp corners, and resist opening the door mid print. A draught from an open window or air conditioning is the most common cause of an otherwise good print splitting.

Yes, and it is one of the strongest cases for it. ASA is the same family of material used for factory exterior trim, so mirror housings, number plate surrounds, mounting brackets and trim clips are well within what it handles. It survives the combination that kills most filaments: constant UV, heat soak in a parked car, and rain. Colour-match it or paint it, and it will not go chalky the way ABS does.

It asks more of you than PLA or PETG. ASA needs an enclosed printer, it warps if conditions are not stable, and like ABS it releases styrene while printing, so it needs proper ventilation rather than a spare bedroom. It is also overkill for anything living indoors on a shelf. Choose ASA when the part faces weather, sun or heat, and choose something easier when it does not.