Sunlu PETG Filament Gray — Sunlu PETG 1.75 mm (Gray)

Sunlu PETG Filament Gray is a 1.75 mm PETG filament for FDM/FFF 3D printers designed for users who need durable, dimensionally stable prints. The material combines good interlayer adhesion with higher impact and chemical resistance than standard PLA, making it suitable for functional prototypes, mechanical parts and everyday household items. It is supplied in gray and is compatible with printers that accept 1.75 mm filament and typical PETG printing temperatures.

Advantages

Sunlu PETG delivers strong interlayer bonding, good impact resistance and reliable dimensional stability during printing. The filament resists warping, produces consistent surface quality and yields parts that retain mechanical properties over time. These characteristics make it a practical choice for objects requiring both visual quality and functional performance.

Suitable for

• Functional prototypes and mechanical components
• Household items and fixtures
• Parts exposed to moderate mechanical stress
• Indoor and some outdoor applications requiring weather resistance

When it may not be suitable

Sunlu PETG is not ideal for applications that require very high-temperature resistance above its heat deflection temperature of about 68 °C. It may also be less suitable for highly detailed decorative prints where the higher flexibility and sheen of PLA are preferred. Very fine, fragile ornamental parts may be better printed in other materials optimized for detail.

Key specifications

• Material: PETG
• Diameter: 1.75 mm
• Color: Gray
• Density: 1.27 g/cm³
• Vicat softening temperature: 68 °C
• Heat deflection temperature: 68 °C
• Melting temperature: 195 °C
• Melt flow rate: 5.3 g/10 min
• Tensile strength: 53 MPa
• Elongation at break: 17.3%
• Flexural strength: 77 MPa
• Flexural modulus: 2226 MPa
• Impact strength: 2.7 kJ/m

How to use

Load the 1.75 mm filament into an FDM/FFF printer and set print temperatures typical for PETG—start around the material melting point and adjust within the printer-recommended PETG range to optimise flow and layer adhesion. Use a heated bed and appropriate bed surface to reduce adhesion issues; a bed temperature near the Vicat/deflection range is not required but typically set lower, depending on the printer and model. Tune retraction and cooling to minimise stringing while maintaining layer bonding. Follow standard spool handling to avoid tangles and store filament in a dry environment to limit moisture uptake.

What to consider before purchase

• Ensure your printer accepts 1.75 mm filament
• Confirm your printer can reach PETG printing temperatures
• Check whether a gray color and the stated mechanical properties suit your intended use
• Plan for dry storage to prevent moisture-related print issues

Usage recommendations

For best results, print Sunlu PETG Gray with a heated bed and moderate cooling; start with conservative print speeds and tune temperature and retraction to balance flow and minimise stringing. Store the filament sealed with desiccant when not in use to preserve print quality.