Bambu Lab PETG HF Filament 1.75mm 1kg

PETG built for speed. HF prints at up to 300 mm/s where standard PETG tops out at 200 mm/s, and Bambu reformulated it to fix the two things people dislike about PETG at pace — oozing and stringing.

Choose it when you want PETG's weather resistance and a clean, even finish, and you want the print done sooner. If the part's job is to be strong, PETG Basic is the better material — see below.

At a glance

Spool or Refill?

Spool — Comes on a reusable Bambu spool. Pick this for your first roll of a colour.

Refill — Filament only, $2 cheaper, needs an empty reusable spool to mount on. Less plastic in the bin, less money out of your pocket.

Worth knowing

HF is not simply a faster PETG Basic — it is a real trade. Tensile strength is 34 MPa against Basic's 51, and stiffness 1810 MPa against 2780. For a load-bearing bracket, Basic is the stronger choice by a wide margin. HF's toughness holds up well though, at 31.5 kJ/m² against Basic's 34.2, so it is not fragile — just less rigid.

What you gain is speed: 300 mm/s against 200 mm/s, which on a long print is the difference between an afternoon and a full day.

Retraction is longer than Basic's, 0.8–1.4 mm against 0.4–0.8 mm, which is part of how the oozing was tamed at speed. If you are carrying a profile over from another PETG, that is the setting to check first.

Storage

Bambu specifies under 20% RH, sealed with desiccant, and 65°C for 8 hours before printing. A sealed box with fresh desiccant does the job, or a filament dryer if you have one. Drop a cheap hygrometer in the box so you're not guessing.

As filament takes on moisture you'll hear popping or hissing at the nozzle, then see stringing and rough surfaces, and eventually the strand goes brittle enough to snap in the tube. That's almost always moisture, not technique. Dry it at 65°C for 8 hours and it usually comes back.