SUNLU PLA Filament Review: Worth Buying?

PLA is the filament most FDM printer owners reach for day to day, so when I picked up a spool of SUNLU PLA 3D Printer Filament 1KG to test, I wanted to know one simple thing: does a budget-friendly spool from a filament-focused brand hold up to regular use, or does it cut corners where it counts?

What Is SUNLU PLA Filament?

SUNLU's PLA line is sold in 1kg spools across a wide range of colors and finishes — standard PLA, transparent, fluorescent, and more — with the standard black, white, and grey spools listed at $18.99 and currently discounted to as low as $10.29 on SUNLU's own store. Each spool holds 1kg of 1.75mm filament (about 330 meters), which is the standard size for most FDM desktop printers.

Print Settings I Used

SUNLU lists a printing temperature range of 200–210°C at 50–100mm/s, or 210–240°C for faster printing at 100–200mm/s, with a filament diameter tolerance of 1.75 ± 0.02mm. On the bed side, SUNLU notes that an unheated bed needs glue for adhesion, while a heated bed at 50–60°C doesn't require glue. I stuck close to the middle of that temperature range and got clean first-layer adhesion without needing to fight the settings.

What I Liked

Consistent diameter: The tight 1.75 ± 0.02mm tolerance SUNLU lists matched what I saw in practice — no extrusion hiccups from an out-of-spec spool.
Low shrinkage: SUNLU rates this filament at 0.3–0.5% shrinkage, and prints came out dimensionally accurate without the warping that cheaper PLA sometimes shows on larger flat parts.
Beginner-friendly range: The wide printing-temperature window (200–240°C) gave me room to tune speed versus quality without the filament becoming stringy or brittle.
Price for the quality: At the current sale pricing, it's one of the more affordable options for a spool that prints this predictably.

What Could Be Better

Color-dependent pricing: Standard colors like black and white are the cheapest; more specialized shades (transparent, fluorescent) cost a few dollars more per spool.
No spool-free refill option for every material: SUNLU does sell a refill system to cut down on plastic waste, but it currently covers PLA, PLA+, PLA+ 2.0, and PETG rather than the full catalog.

Pricing

Regular price is listed at $18.99 per 1kg spool, with sale pricing currently starting around $10.29 depending on color. SUNLU also offers free shipping on orders of $40 or more to the USA, Europe, the UK, Canada, and Australia, which makes it easy to stock up on a few colors in one order.

Final Verdict

For anyone running a standard FDM printer and looking for a dependable, easy-to-tune PLA spool, SUNLU's PLA filament is a solid pick — it holds its stated tolerances, prints cleanly across a wide temperature range, and the current sale pricing makes it easy to try without much risk.

Ready to try it yourself? You can use code WEFQSCFWLT for 4% off your order — shop SUNLU PLA filament here.