Polymaker PolyMax PC

Where it shines

High-impact, high-heat structural prints — toughest non-nylon you'll print at home.

Common use cases: structural, outdoor, high-temp, engineering.

Where it falls short

Needs enclosed printer; absorbs water aggressively.

Print profile starting point

• Nozzle temp: start at 260°C and tune ±5°C for surface finish.
• Bed temp: 90°C is usually enough for adhesion; go up toward 105°C if first layer struggles.
• Drying: 80°C for 8 hours before printing if the spool has been opened more than a few days.
• Enclosure: required to prevent warping and layer cracking.

Field review: Polymaker PolyMax PC

Hands-on review based on extended testing across multiple printer setups. Independent; not sponsored by Polymaker.

Polymaker PolyMax PC is the brand's polycarbonate filament, and at $50 per 0.75kg spool it sits firmly in the engineering-grade segment of the consumer 3D printing market. PC is a fundamentally different material than PLA or PETG — significantly stronger, more heat-resistant, more impact-resistant, but with print complexity that requires high-temperature printers and operator experience. Our testing confirms PolyMax PC delivers on the mechanical promises but the printing curve is steep.

In our testing, PolyMax PC prints at 270°C nozzle, 105°C bed, in a fully enclosed printer with chamber temperature controlled near 60°C. The high-temperature requirements eliminate most consumer printers immediately — A1, Mini, and other lower-temp printers cannot reliably reach the required nozzle temperatures. The X1C and P1S handle PolyMax PC well; Voron 2.4 and similar high-end DIY printers are the ideal printing platform.

The mechanical properties are the central reason to choose PC. Tensile strength at 60-70 MPa is well above PLA and PETG, glass transition at 110°C handles temperatures that destroy lesser materials, and the impact resistance is competitive with ABS while delivering better dimensional stability. For engineering applications, automotive parts, electrical enclosures, and prints that will see real engineering stress, PC is the appropriate material.

The print difficulty is the central friction. Beyond the high-temperature requirements, PC is highly hygroscopic — meaning it absorbs atmospheric moisture aggressively, and a wet spool produces prints with severe surface popping, layer cracking, and complete print failures. Drying at 80°C for 8-12 hours before printing is required, and storage in sealed containers with strong desiccant is non-negotiable.

The drying time matters enough that operators printing PC regularly typically invest in dedicated filament dryers that maintain spools at 70-80°C during printing. The cost of a quality filament dryer ($150-$300) is small compared to the cost of failed PC prints from undried filament.

The pricing at $50 per 0.75kg spool is competitive with PolyLite PC and Prusament PC at similar price points. The cost-per-print on PC is meaningfully higher than commodity filaments — by the gram, PC is roughly 3-4x the cost of standard PLA — and the failure rate during the learning curve adds to the effective cost. For applications where the mechanical properties justify the cost, PC remains the right choice; for applications where good-enough mechanical properties are acceptable, PETG or ABS at lower price points and easier printing are reasonable alternatives.

The color range is very limited — typically just clear/natural and black in the PolyMax PC line. PC's mechanical applications often don't require diverse colors, but users who want PC's mechanical properties with broader color options need to look at specialty manufacturers.

For engineering parts, automotive applications, electrical enclosures requiring high-temperature handling, prototypes that will see real loads, and any application where ABS or PETG aren't sufficient, PolyMax PC is one of our recommendations for users with high-temperature enclosed printers. For users without the right printer hardware, PC printing isn't reliably accessible regardless of which brand's PC you buy.