3D printing materials guide: PLA, ABS, PETG, Nylon, resin — which one to choose?
Complete comparison of 3D printing materials: PLA, ABS, PETG, ASA, Nylon, TPU, SLA resin. Properties, uses, thermal and mechanical resistance. Guide to choosing the right one.
Material choice is the most important decision in your 3D printing project. Choose wrong and your part will break within two days, melt in the sun or won't withstand its intended use. This guide compares the most common materials to help you make the right choice. For logistics (files, photos, timelines), see how to prepare your 3D printing project.
At NC Factory (Antibes), we pick the material based on real-world use — not filament price alone.
PLA (Polylactic Acid) — The entry-level material
PLA is the most popular material in consumer 3D printing. Made from corn starch, it's biodegradable and easy to print. But beware: its limitations are serious.
- Heat resistance: 55-60°C only — deforms in sunlight or near heat sources
- Mechanical strength: brittle, breaks under impact
- Use: mockups, visual prototypes, decoration only
- Not suitable for: functional parts, outdoor, automotive, marine
At NC Factory, we advise against PLA for any functional part. It's the material of personal printers, not professional manufacturing.
Simple rule: PLA for mockups; PETG/ASA/Nylon when it must last (kitchen, outdoor, mechanical).
ABS (Acrylonitrile Butadiene Styrene) — The industrial classic
ABS is the plastic of LEGO bricks and phone cases. Robust, impact and moderately heat resistant, it's an excellent all-round choice.
- Heat resistance: up to 95°C
- Mechanical strength: good impact and flexural resistance
- Use: functional parts, housings, mechanisms, home appliances
- Limitation: UV sensitive (yellows and weakens in prolonged sunlight)
PETG (Polyethylene Terephthalate Glycol) — The all-rounder
PETG combines PLA's ease of printing with ABS's strength. It's our most recommended material for individual projects.
- Heat resistance: up to 80°C
- Chemical resistance: resistant to water, oils and many solvents
- Food contact compatible (certain formulations)
- Use: kitchen, bathroom, indoor parts, containers, prototyping
- Good natural transparency
ASA (Acrylonitrile Styrene Acrylate) — The outdoor champion
ASA is the improved version of ABS, with exceptional UV resistance. It's THE material for any part exposed to sunlight.
- Heat resistance: up to 95°C
- UV resistance: excellent — won't yellow or crack
- Weather resistance: rain, humidity, temperature variations
- Use: exterior auto parts, garden, pool, marine, signage
Nylon PA6 and PA12 — Mechanical strength
Nylons (polyamides) are the strongest materials available in FDM 3D printing. They withstand extreme mechanical and thermal stresses.
- Heat resistance: PA6 up to 120°C+, PA12 up to 110°C
- Mechanical strength: extreme resistance to wear, fatigue and impact
- Available in carbon fiber reinforced (PA6-CF) for maximum rigidity
- Use: gears, bearings, engine parts, mechanical components, robotics
- Slightly hygroscopic: absorbs moisture (controlled storage required)
TPU — The flexible material
TPU (Thermoplastic Polyurethane) is a 3D-printable elastomer. It offers rubber-like flexibility.
- Hardness: available from Shore 85A (very soft) to Shore 95A (semi-rigid)
- Abrasion resistance: excellent
- Use: seals, sleeves, protections, shock absorbers, soles, fenders
- Excellent chemical resistance
SLA Resin — Extreme precision
SLA printing (stereolithography) uses UV-cured photopolymer resins. The finish is incomparable to FDM technology.
- Resolution: down to 25 microns (0.025mm) — virtually invisible to the naked eye
- Finish: smooth, injection-molded quality, no visible layer lines
- Types: standard, flexible, high temperature, castable (jewelry) resin
- Use: jewelry, dental, precision mockups, aesthetic parts, molds
- Limitation: more brittle than FDM for common functional parts
Summary: which material for which use?
Here's our recommendation based on intended use:
- Indoor / home / office → PETG
- Outdoor / garden / pool → ASA
- Automotive / heat → ABS, ASA or Nylon PA6
- Marine / yacht → ASA or Marine PETG
- Mechanical / gears → Nylon PA6 or PA6-CF
- Seals / flexible parts → TPU
- Jewelry / high precision → SLA Resin
- Visual prototypes only → PLA (but we recommend PETG)
For individuals doing everyday repairs, PETG/ASA covers most needs — as in our 3D printing for individuals article.
Expert tip: don't make the PLA mistake
The most common trap: ordering a part in PLA because it's cheaper, only to see it deform in the first summer. At NC Factory, we systematically select the material suited to your use and environment. The price difference between PLA and PETG/ASA is minimal, but the durability difference is enormous. For comparison with injection or machining, read 3D printing vs traditional manufacturing.
Frequently asked questions
In real use, PETG is usually better (thermal and chemical resistance). PLA deforms quickly near heat.
ASA is the safest for UV and weather; nylon suits high mechanical stress.
Not for every case: nylon excels in wear and heat; ABS remains excellent for many general parts. We decide based on your part.
Resin offers superior finish but is often more brittle for typical mechanical parts — we guide by use case.
Yes, and it's recommended: describe environment and stresses, we propose the right filament or resin.
Send us your project and we'll recommend the optimal material. Free quote within 24h — workshop in Antibes, delivery to Cannes, Nice, Monaco and all of 06.
