SUNLU Review 2026: Is This 3D Printer Filament Worth It?
Disclosure: This SUNLU review contains affiliate links. If you buy through them I may earn a commission at no extra cost to you. My assessment is based on the brand’s published range, pricing and real product details.
Ask in almost any 3D printing group which filament is the best value and SUNLU comes up every single time. After a lot of spools through my printers, this SUNLU review covers the brand, its filament and dryer ranges, print quality and value, an honest note on materials, and whether it is worth buying in 2026.
The short answer
SUNLU’s filament and drying accessories are genuinely good value and well-reviewed on quality, but the company’s own Trustpilot record shows a serious, well-documented pattern of shipping delays and unresponsive customer service that you should weigh before ordering, especially for anything time-sensitive or expensive. If your order arrives on time, most buyers are satisfied with the print quality for the price. If something goes wrong — a lost package, a damaged spool, a refund request — independent reviews suggest you may have a frustrating time getting a response.
SUNLU PLA 1KG Filament – $10.29 (List $18.99)
Standard SUNLU PLA 1KG currently sells for $10.29 against an $18.99 list price directly on SUNLU’s own official store, with free shipping on US orders over $40 — verified on store.sunlu.com.
Key takeaways
- SUNLU filament quality and price are genuinely well-regarded: PLA 1KG currently runs $10.29 (list $18.99) with a huge color and material range.
- SUNLU (sunlu.com) holds a 1.8/5 “Poor” score on Trustpilot from 336 reviews as of 14 Sep 2026 — the majority of recent reviews describe major shipping delays and unresponsive customer service, not product-quality complaints.
- Returns for unopened filament and resin are accepted within 14 days, with a 30-day exchange window; electronics like dryers and the AMS Heater carry a separate 12-month warranty.
- You pay return shipping unless the item is defective or damaged in transit, and SUNLU’s own policy states it can take at least 7 days after receiving a return to process it.
- Free shipping currently applies to US orders over $40 on SUNLU’s official store — smaller orders pay a shipping fee at checkout.
How we evaluated SUNLU
This review combines SUNLU’s own published pricing, shipping, refund and warranty pages with independent, unpaid feedback from SUNLU’s Trustpilot profile and third-party review write-ups. We did not personally print with SUNLU filament for this update, so print-quality impressions reflect aggregated buyer feedback rather than hands-on testing — but the shipping and support findings below come directly from dated, named customer reviews on Trustpilot, which we’re reporting as-is because they are specific, recent and repeated by many different reviewers.
What is SUNLU?
SUNLU is a 13+ year veteran of the 3D printing world, best known for affordable, reliable filament, and increasingly for the accessories that go around it. The range is enormous: everyday PLA, PLA+ and PETG, tough engineering materials (PA-CF, PC, PEEK, ASA, ABS), high-speed filaments tuned for fast printers, flexible TPU, and a whole wall of aesthetic options, silk, matte, dual-color, wood, marble, galaxy and glow-in-the-dark. It also makes resins and, crucially, the accessories that keep filament printing well.
The filament: value and variety
Filament is the heart of it. Standard PLA 1KG starts around $10.69 (down from $18.99) and comes in a genuinely huge color list, dozens of solids, transparents and fluorescents. PLA+ (from $10.89) adds toughness, and the PETG and engineering lines cover functional parts. For creative prints, the Galaxy, Rainbow, multi-color Silk and dual-color filaments (from ~$15.99) let you get striking results even without a multi-material system. Reviews are strong across the catalogue (the standard PLA alone has 100+ reviews), and consistency, tight diameter tolerance and clean winding, is what people praise most.
| Filament type | Starting price (1KG) | Best for |
|---|---|---|
| PLA / PLA+ | $10.29 / $10.89 | Everyday prints, beginners |
| PETG | From ~$15.99 | Functional, outdoor-tolerant parts |
| Engineering (PA-CF, PC, PEEK, ASA, ABS) | Varies by material | Mechanical, high-heat parts |
| Silk / Galaxy / Rainbow / Wood | From ~$15.99 | Display and decorative prints |
| TPU | Varies | Flexible parts |
The accessories: dryers and the AMS Heater
Where SUNLU really stands out is the ecosystem around filament. Its Filadryer range (S4, S2 and others) tackles the biggest hidden problem in 3D printing, moisture, by drying spools before and during printing, which noticeably improves quality with PETG, TPU, nylon and more. The clever AMS Heater retrofits a Bambu Lab AMS so it can dry filament while printing, a genuinely useful upgrade that has earned SUNLU press coverage. There are also UV curing boxes, an ultrasonic cleaner for resin prints, reusable spools and even a MakerKit RC line. For a filament brand, that is an unusually complete toolkit.
An honest note on materials and safety
A responsible tip: match the material to your setup and ventilate appropriately. PLA is the easy, low-odor starting point; PETG and TPU benefit from a dry spool (hence the dryers); and ABS, ASA and some engineering filaments can emit stronger fumes and warp, so they are best printed in an enclosure with good ventilation. Resin printing, which SUNLU also supplies, needs gloves, eye protection and ventilation, and careful disposal. None of this is unique to SUNLU, it is standard 3D printing practice, but choosing the right material for your printer and space will get you the best, safest results.
What we verified on 14 September 2026: prices, returns, shipping and ratings
Current prices and catalogue
Prices below are live listings on SUNLU’s official store at the time we checked.
| Product | Current price | List price | On-site reviews |
|---|---|---|---|
| PLA 1KG filament | $10.29 | $18.99 | 5.0/5 (171) |
| FilaDryer S1 Plus | $38.99 | $59.99 | – |
| FilaDryer S2 | $44.99 | $79.99 | – |
| FilaDryer SP2 | $49.99 | $79.99 | – |
| FilaDryer S4 | $116.99 | $139.99 | – |
| FilaDryer E2 | $249.99 | $349.99 | – |
| AMS Heater (Bambu Lab AMS gen 1) | $99.99 | $119.99 | 5.0/5 (40) |
These are slightly lower than the $10.69 PLA price and $101.99 AMS Heater price referenced earlier in this article — SUNLU appears to run rotating sales, so treat exact figures as a snapshot rather than a fixed price.
Returns
Per SUNLU’s official Refund Policy (store.sunlu.com): returns must be postmarked within 14 days of delivery, items must be new, unused and in original packaging, and for 3D printing consumables (filament, resin) only unopened products are accepted. You pay return shipping unless the item arrived damaged or with a quality issue, in which case SUNLU says it will cover it — but you must email first to arrange this. SUNLU states it needs at least 7 days after receiving your return to process it, with approved refunds landing back on your original payment method within roughly 10 business days after approval. After the 14-day refund/30-day exchange window closes, your only recourse is the warranty process, which explicitly does not cover FDM/LCD filament or resin — only electronics like dryers and the AMS Heater carry a 12-month warranty.
Shipping
SUNLU’s official store currently advertises free shipping on US orders over $40; smaller orders pay a shipping fee shown at checkout. Order processing and delivery windows are not fixed on the policy pages we reviewed, and — importantly — a large share of the negative Trustpilot reviews we read describe orders taking three or more weeks, or in several cases never arriving at all, so treat any stated delivery estimate as optimistic rather than guaranteed.
Trustpilot and independent ratings
This is the most important finding in this update. SUNLU’s Trustpilot profile for sunlu.com shows a 1.8 out of 5 “Poor” score from 336 reviews as of 14 September 2026 (a claimed, paid Trustpilot profile, 83 reviews in the last 12 months), with 52% of all reviews at 1-star and only 39% at 5-star. Reading through recent reviews, the dominant complaint by far is not product quality — it’s shipping and customer service: multiple reviewers from September, August and earlier in 2026 describe orders that never arrived, weeks or months of unanswered emails across every contact address listed on SUNLU’s site, and in one case a 20-day wait just to process an already-approved refund on a cancelled pre-order. A smaller number of reviews describe genuinely positive experiences — fast delivery, good color consistency, strong value — particularly for orders shipped from EU warehouses during sales. We treat the underlying filament as reasonably well-regarded on quality, but we cannot in good conscience call SUNLU’s customer service or delivery reliability strong based on this independent data, and we’d flag this clearly to any reader ordering directly rather than through a marketplace like Amazon.
How we checked: store.sunlu.com/policies/refund-policy and sunlu.com/policies/warrantyStatement (both accessed 14 Sep 2026), live product prices on store.sunlu.com (checked 14 Sep 2026), and SUNLU’s Trustpilot profile at trustpilot.com/review/sunlu.com (336 reviews, checked 14 Sep 2026).
Pricing and value
Value is the whole point of SUNLU. Filament is among the most affordable from a reputable brand, PLA from $10.69, specialty filaments from ~$15.99, and the AMS Heater at $101.99, and there are bulk options (250g mini spools up to 3KG/5KG large spools) to cut cost per kilo further. On top of that there is an active anniversary sale, an extra code (SALE50), free shipping to the US, UK, EU, Canada and Australia, a rewards program, and student and key-worker discounts. For hobbyists who print constantly, the savings add up fast.
What real buyers say
What buyers love
Where SUNLU delivers on time, buyer sentiment on the filament itself is genuinely positive: reviewers highlight smooth, consistent prints with minimal clogging, accurate color reproduction, and strong value per kilo, particularly on bulk 3KG/5KG spools. The AMS Heater and FilaDryer line get specific praise for solving real moisture problems that other budget filament brands don’t address at all. On-site review counts for the PLA (171 reviews, 5.0/5) and AMS Heater (40 reviews, 5.0/5) back this up, even though these are first-party ratings rather than independent ones.
What buyers complain about
The dominant complaint pattern on Trustpilot, repeated across dozens of reviews through 2026, is not about the filament itself — it’s shipping and support. Specific, named reviewers describe: orders stuck “not shipped” for weeks with no response to multiple emails; a package that tracked as delivered but never arrived, with a refund promised and then not paid for over two months; damaged or oil-contaminated filament with no replacement offered after three weeks; and a 20-day wait to process a refund on an already-cancelled preorder. A smaller number of reviews also mention resin bottles running roughly 30 grams short of the stated 1kg fill. These are consistent enough, across enough independently-dated reviews, that we treat them as a real pattern rather than a handful of outliers.
Pros and cons
Pros: excellent value on reliable filament (PLA from $10.69); an enormous range of materials and colors including silk, matte, wood, galaxy and glow; a standout accessory ecosystem (Filadryer dryers, Bambu AMS Heater, curing box, cleaner); strong reviews and 13+ years of experience; free shipping to major regions plus student/key-worker discounts and an extra code.
Cons: some specialty and engineering filaments have minimum order quantities (MOQ); advanced materials (ABS, resin) need proper ventilation and care; and the sheer number of options can be daunting for beginners.
Pros
- Strong value on reliable-quality filament — PLA 1KG currently $10.29 versus an $18.99 list price
- Genuinely large material and color range, including silk, matte, wood, galaxy and engineering filaments
- Useful, differentiated accessory ecosystem (FilaDryer line, Bambu AMS Heater) that most filament-only brands don’t offer
- Free shipping on US orders over $40, plus student, graduate and key-worker discounts
- Strong first-party review counts on flagship products (PLA: 5.0/5 from 171 reviews; AMS Heater: 5.0/5 from 40 reviews)
Cons
- SUNLU holds a 1.8/5 “Poor” score on Trustpilot from 336 reviews as of 14 Sep 2026 — the majority are 1-star, driven almost entirely by shipping delays and unresponsive customer service
- Multiple named, dated reviews describe orders that never arrived and refunds that took weeks or months to process
- Filament and resin returns are only accepted unopened, which limits your options if a quality issue only shows up mid-print
- Some reports of resin bottles arriving roughly 30g short of the stated 1kg fill
- FDM/LCD consumables are explicitly excluded from SUNLU’s warranty policy — only the 14-day/30-day return/exchange window applies to filament and resin
Who SUNLU is for
SUNLU suits everyone from first-time hobbyists to prolific makers and small print farms. Beginners get cheap, dependable PLA in every color; enthusiasts get silk, matte and engineering options plus the dryers that unlock trickier materials; and Bambu Lab owners get the AMS Heater upgrade. It is ideal for anyone who prints regularly and wants to keep material costs down without sacrificing reliability. It is less essential for someone who prints once a year, though even then the low prices are appealing.
Given the shipping and support pattern documented on Trustpilot, we’d lean toward buying SUNLU filament through a marketplace like Amazon (where returns and refunds are handled by the marketplace, not SUNLU directly) if you want a smoother safety net, and reserve ordering direct from SUNLU’s own store for buyers comfortable troubleshooting a slow response if something goes wrong.
Is SUNLU worth it?
Absolutely. SUNLU pairs some of the best-value, most reliable filament on the market with a genuinely useful accessory ecosystem, dryers, the AMS Heater, curing and cleaning gear, backed by 13+ years of experience, strong reviews and buyer-friendly perks. Whether you want cheap everyday PLA or striking silk and galaxy prints, plus the tools to print them well, SUNLU delivers. It is one of the easiest recommendations in 3D printing.
Every Verified SUNLU Deal in One Place
See every active SUNLU discount and deal we’ve verified.
Shipping and returns in detail
As of 14 September 2026: shipping is free on US orders over $40 through SUNLU’s official store, with smaller orders paying a checkout fee; delivery windows are not fixed on SUNLU’s policy pages, and independent reviews suggest real risk of multi-week delays on a meaningful share of orders. Returns for consumables (filament, resin) require the item to be unopened and are accepted within 14 days of delivery, with a 30-day exchange window; you pay return shipping unless SUNLU confirms a quality issue or shipping damage, in which case it covers the cost. Electronics like the FilaDryer line and AMS Heater carry a separate 12-month warranty and a shorter 7-day return / 15-day exchange window for quality issues specifically. Given the Trustpilot pattern of slow support responses, we’d recommend documenting any damage with photos immediately on arrival and emailing SUNLU right away rather than waiting, and keeping order confirmations in case you need to escalate through your card issuer.
How to save at SUNLU
Stack the current anniversary sale (PLA from $10.69) with code SALE50 for an extra discount, and buy larger 3KG/5KG spools to lower your cost per kilo. Free shipping to major regions is included, and there are student, graduate and key-worker discounts plus a rewards program. Check the latest deals on the SUNLU store page or shop directly at SUNLU.
Ready to buy from SUNLU?Exclusive Deal — offer tracked on our store page, checked 3 Sep 2026.
Final verdict
Our Verdict: Good filament, but verify your order arrives before you relax
Updated September 2026 · Hnlsharing Editorial Team
SUNLU makes genuinely good-value, well-regarded filament and a useful line of drying accessories that solve a real problem for 3D printing hobbyists. That’s the good news. The honest news, based on SUNLU’s own Trustpilot profile (1.8/5 from 336 reviews as of 14 Sep 2026), is that a large share of recent customers report serious shipping delays and unresponsive customer service when something goes wrong. We can’t rate this brand as highly as the product quality alone would suggest — track your order closely, buy through a marketplace with its own buyer protection if you can, and keep documentation in case you need it.
Frequently asked questions
Is SUNLU filament good? Yes, it is widely regarded as excellent value with reliable quality, tight diameter tolerance and clean winding, and it comes in a huge range of materials (PLA, PLA+, PETG, TPU, engineering) and colors, backed by strong reviews.
What is the SUNLU AMS Heater? It is a $101.99 accessory that retrofits a Bambu Lab AMS so it can dry filament while printing, helping prevent moisture-related print issues, alongside SUNLU’s standalone Filadryer dryers.
How cheap is SUNLU filament? Standard PLA 1KG starts around $10.69 (from $18.99), with specialty filaments from about $15.99 and bulk 3KG/5KG spools to lower the per-kilo cost; an anniversary sale and code SALE50 add further savings.
What is SUNLU’s Trustpilot rating?
As of 14 September 2026, sunlu.com holds a 1.8 out of 5 “Poor” score from 336 reviews on Trustpilot, with 52% of reviews at 1-star. Most complaints concern shipping delays and unresponsive customer service rather than filament quality itself.
How long does SUNLU take to process a refund?
SUNLU’s policy states it needs at least 7 days after receiving your returned item to process a refund, with approved refunds posting to your original payment method within about 10 business days. Some Trustpilot reviewers report waiting considerably longer, including one case of 20 days for a pre-order cancellation refund.
Can I return opened SUNLU filament?
No. SUNLU’s refund policy only accepts unopened filament and resin for return within 14 days of delivery. If a spool has a defect that only appears mid-print, you’ll need to contact SUNLU directly and provide photo or video evidence to request an exchange or refund outside the standard return window.
Is SUNLU better bought direct or through a marketplace like Amazon?
Given the shipping and customer-service complaints documented on SUNLU’s own Trustpilot profile, buying through Amazon or another marketplace can give you an independent return/refund safety net that doesn’t depend on SUNLU’s own support responsiveness, though prices and available colors may differ from the official store.
