PETG 3D printing — The versatile material for durable parts

Table of contents:
What is PETG? · When should you choose PETG? · Variants at MF · Typical jobs · What does it cost? · FAQ

PETG (polyethylene terephthalate glycol) is today one of the most widely used materials in professional FDM 3D printing — and for good reason. The material combines the best of two worlds: PLA's easy printability and ABS's mechanical durability. At Maker Factory, we use PETG for everything from prototype housings to end-user components, because it simply delivers an excellent balance of price, strength, and surface quality.

Do you have a part that needs to withstand light moisture, chemicals, or mechanical load without breaking at the first impact? Then PETG is likely the right choice. In this guide, we cover what PETG is, when you should choose it over other materials, and what you can expect from the result — based on the jobs we handle every day.

What is PETG?

PETG is a thermoplastic in the polyester family, modified with glycol (hence the "G") to make it more amorphous and therefore easier to print without brittleness or warping. Pure PETG plastic is slightly translucent, impact-resistant, and has good chemical resistance to weak acids and alkaline solutions.

In 3D printing, PETG stands out for bonding layers together well — this gives isotropic strength, meaning a part that's nearly as strong across layers as it is along them. That's a crucial advantage for functional parts subjected to mechanical load from all directions.

When should you choose PETG over other materials?

PETG isn't right for everything — but it's right for surprisingly much. Here are the situations where PETG consistently delivers better results than PLA and is easier to print than ABS:

• You need a part that can handle light moisture or cleaning with mild detergents
• The part will be installed in an environment with temperatures up to 75–80 °C
• You need impact resistance — the part should bend a little rather than snap
• The product needs to look presentable without heavy post-processing (PETG has a natural sheen)
• You're producing a batch of 5–100 units and want consistent quality from the first to the last part
• The material needs to be food-safe — food-safe PETG is possible with the right printer setup

Housings and enclosures for electronics

One of the most classic PETG applications is housings for electronic components — control units, sensor boxes, terminal blocks, and control panels. PETG has the right combination of stiffness, slight flexibility, and electrical insulation to protect sensitive electronics. The material is also easy to finish with inserts and screws, since it doesn't crack under torque the way PLA does.

We've printed housings for everything from IoT devices to industrial control cabinets — typically in black PETG with tolerances of ±0.2 mm at joint points. Lead time: 2–4 business days for standard geometries.

Machine parts and fasteners

Slides, brackets, clamps, cable clips, and mounting brackets are all natural PETG parts. The material withstands repeated loading better than PLA and is far easier to run through the printer than ABS — without major warping issues. In production environments where parts sit in robot cells or on conveyor belts, PETG is the default choice, unless the temperature exceeds 80 °C (in which case we switch to ASA or PA6-CF).

Prototypes with functional mechanics

When a prototype doesn't just need to look like a part but actually needs to function like one — testing joints, moving hinges, pressure-sensitive snaps, or press-fit inserts — PETG is the best choice in the price range below PA6-CF. It's strong enough for realistic testing but affordable enough that you can run 3–5 iterations before locking the design.

A concrete example from our production: a product developer with a smart-lock mechanism sent us 7 iterations of PETG prototypes over 3 weeks before moving to production. The combined price for all iterations was under half of what a single CNC prototype would have cost.

PETG variants at Maker Factory

Typical PETG jobs we handle

• Industrial production: Jigs, assembly aids, spacers, and brackets
• Electronics & technology: Sensor boxes, cable trays, control panel covers
• Machine building & automation: Camera mounts, robot cell fixtures, conveyor guides
• Prototype batches for testing and customer presentations

What does PETG printing cost at Maker Factory?

What we see from our PETG customers

PETG is by far the most-ordered material at Maker Factory — and that tells its own story. Customers come back with PETG order after order, not because it's the cheapest (PLA is cheaper), but because it solves the real challenges they face: parts that need to sit in a production cabin at 40 °C, housings that need to withstand industrial cleaning, prototypes that need to survive 15 function tests before the design is locked.

A typical business customer of ours uses PETG for mounting brackets and cable management on production lines. They send an STL file on Monday, and we deliver on Wednesday. It's neither rocket science nor an expensive specialist skill — it's just a well-functioning workflow with a material that doesn't disappoint.

A concrete example: a Danish electronics manufacturer ordered 45 PETG housings for a sensor unit to be mounted in a warehouse with varying temperature. PLA would have lasted 8–10 months. PETG holds up for 3–5 years in that environment. The price difference per unit was DKK 18. The decision took them under a minute.

PETG isn't a "good enough" compromise for prototypes, either. For function testing, it's in many cases the most honest material — it behaves mechanically much like the final product, whether ABS, PC, or PETG is used in batch production. We always recommend running the first 3–5 iterations in PETG before locking in the material.

The only scenario where we consistently advise against PETG is outdoor UV exposure over a season and temperatures above 80 °C. Here, ASA (outdoor) or PA6-CF (high temp/load) are better choices — and we always give that recommendation proactively, before sending a quote.

FAQ — PETG 3D printing

Is PETG stronger than PLA?

PETG isn't necessarily stronger in pure tensile strength, but it's far more impact-resistant and withstands more deformation before breaking. PLA is more brittle and snaps under sudden load, while PETG bends and absorbs the energy. In most functional applications, PETG is the better choice.

Can PETG be used outdoors?

PETG can be used outdoors briefly, but it isn't UV-stable long term. For permanent outdoor use, we recommend ASA, which is specifically formulated for UV and weather resistance.

Are PETG prints watertight?

FDM-printed PETG parts aren't automatically watertight, since the layers can have microscopic pores. With the right printer settings (100% infill, high extruder temperature), we can achieve watertight parts — contact us if this is a requirement.

What's the difference between PETG and PETG-CF?

PETG-CF contains short carbon fibers that increase stiffness by 30–50% and reduce shrinkage. PETG-CF is best for precision parts and jigs. Standard PETG is more impact-resistant and cheaper. Read our PETG-CF guide →

What's the minimum order size?

No minimum order — we print from 1 unit. The unit price drops for batches of 10+, 25+, and 100+.