CoEX Filament Review 2021 PLA, ABS, PETG, TPU, TPE

CoEX LLC is a company who strives to provide top-tier plastic filament. Their mission statement shows they have a system that they base on Christian values which is hard to find in this cut-throat world of today. They want to produce products that each client prefers over all other options, and will work for the client to make that a reality. I will share each filament’s Cura slicer profile in our download section, also you can find at the bottom of the page.

When you buy 3D printer filament from Coex LLC, you can expect quality products and much more. Whether you are an engineer developing 3D prototypes at a large company or an entrepreneur who is creating products at home, well provide you the same level of excellent service and cutting-edge products.

PLA Review

CoEX sent me two different types of PLA, one being regular PLA; and the other called PLA Prime which is made from Natureworks Ingeo 3D850 and boasts improved heat resistance, more toughness, good adhesion and less warping or curling than traditional PLA. For my testing I decided to make a filament color swatch of each one, as well as a single “Cali-Cat” the calibration cat. This was a fair test of adhesion, warping, and consistency.

The regular PLA filaments that I tested were the Neon Green, Maroon Red, and Metallic Gunmetal Silver. My favorite PLA color was definitely the Metallic Gunmetal Silver, which had lots of flake and a nice color; while my 7 year old son highly enjoyed the Neon Green. During my print tests I noticed that the Gunmetal Silver was also the clear winner for Quality. The Maroon red was second place in the overall quality of the print, with neon green being my 3rd rank. All three of the PLA filaments passed my toughness test, with the cat’s tail not breaking off with force.

The last test print was with the PLA Prime material, which I was excited to test. It’s hard to find a good quality PLA made with top tier materials, that is consistent from roll to roll. This black PLA prime made the nicest Cali Cat that I have ever made! There were no strings, no warping on corners, and the tail was made without any flaws. If I were to buy a roll of PLA material today, I would pick the CoEX PLA Prime material over the rest. We will further test the strength and finished good melt point later in the week.

CoEX PLA Print Settings Ender 5(Direct Drive)

  • Difficulty to Print: Easy
  • Nozzle Temperature: 215*
  • Bed Temperature: 65*
  • Retraction: 0.55mm
  • Retract Speed: 66mm/s
  • Print Speed: 60mm/s
  • First Layer: 0.24mm – 0.30mm

PETG Review

The PETG filament from CoEX was two different colors. One being Raspberry which is FDA approved Food Grade filament. Second being the Cobalt Blue, which is a really neat color. I am a fan of PETG, although I don’t print it that often. I usually tend to lean more towards ABS, although PETG is likely just as good for most applications. I will admit it took me a little while to tune my printer for the PETG filament. I ended up with two very nice prints and the colors are really unique. I haven’t used many different brands of PETG. I can only compare with Creality, and Prusa brand PETG. I would recommend CoEX PETG over those ANY DAY, as I spent days trying to tune the other brands.

After one print with some stringing, I made several changes to my slicer settings and churned out two more sample pieces which I am quite proud of. The cobalt blue looks more purple in photos, in real life it has a dark blue color. Raspberry is a unique color and has a dark red, or as described by CoEX “blue shade of red”. Another positive about the raspberry PETG is that you can make products which are food safe. If you want to print customized measuring cups, food containers, or other utensils you can with peace of mind.

There were minimal wisps of filament from travel, that will wipe away with some effort. Overall I can also suggest the CoEX brand of PETG over any others I have tried. Not only due to the ease of use, but the colors and strength are also great.

CoEX PETG Print Settings Ender 5(Direct Drive)

  • Difficulty: Medium
  • Nozzle Temperature: 235*
  • Bed Temperature: 90*
  • Retract Distance: 1.5mm
  • Retract Speed: 65mm/s
  • Fan: 50% @ Layer 3
  • Print Speed: 45mm/s

TPU & TPE Review

CoEX brand TPU and TPE was something I was quite curious about. The 60A TPU claims to be the most flexible filament on the market, almost like rubber band consistency. When I read about this 60A filament, I was concerned that my BMG extruder would not even print it! In addition to the sample 60A filament, I also was sent 30D, 40D, and 60D shore hardness TPE filaments to trial. Although flexible filaments are more difficult for beginners to print, they are something I recommend everyone learn to use. There are so many use cases for flexible filament, you can probably think of many right now.

Quote from CoEX

CoexFlex thermoplastic elastomer (TPE) and thermoplastic polyurethane (TPU) filaments are manufactured from the highest quality versatile copolyesters developed by DuPont and BASF. Our CoexFlex filaments combine the flexibility of rubber with the strength and processibility of thermoplastics. They combines resilience, and heat and chemical resistance with strength and durability and are used by customers across several industries (automotive, electrical, electronics, furniture, sporting goods, oil and gas etc.).

CoexFlex TPU 60A Review

Immediately after opening this package, I was shocked. I have experience with NinjaFlex and other brands of TPU, but this one was shockingly flexible. The relation to rubber bands is certainly not far fetched. I was seriously concerned that I would not be able to just put the sample onto my filament roller, and print. I decided to unwind the filament, and put onto an old spent spool. I knew I would likely need to adjust some slicer settings in order to get this to print, so we performed the same print with Cali Cat. Our first attempt failed horribly, at only the third layer. I knew we would need to slow down the print quite drastically, as it had mangled up inside my BMG extruder. Luckily it was not too difficult to clear it out, and I was ready for my second attempt.

After slowing down the print, we successfully managed to print out our Cali Cat and Filament Swatch. I am just amazed at how flexible the finished product is even with infill, it’s something I have never experienced in 3D printing. At Shore 60A, it is much softer than Ninjaflex or Filaflex, feels like a rubber band, and produces finished parts that are completely tactile, flexible no matter what infill you use.  Highly functional for applications that require stretch, flexibility, or compliance.

CoEX TPU 60A Print Settings Ender 5(Direct Drive Required)

  • Difficulty: Hard
  • Nozzle Temperature: 205*
  • Bed Temperature: 65*
  • Retract Distance: 2.75mm
  • Retract Speed: 35mm/s
  • Fan: 50%
  • Print Speed: 15mm/s

CoEX Flex TPE 30D, 40D, 60D Review

After trying the 60A which was extremely flexible, it was nice to try out these slightly harder filaments. They boast the harder filaments are great for any project that needs some flexibility, and tensile strength. I see these being great for making custom gaskets, and parts that need to be compliant. I was surprised to see how much easier it is to print the harder filaments as well. I had no issue printing these TPE Flexible filaments, and was able to reuse the 60A profile to avoid multiple profiles. Overall you should really experiment with each one, or ask for samples such as the ones I received to decide which one best fits your project.



Does CoEX Flex live up to the hype? Will they satisfy your needs in the quality, and customer support departments that are important to 3D printing? Yes for all of the above. We were pleasantly surprised by quick communications, excellent quality and unique products. We recommend going over to their website, and placing an order. Otherwise use their contact form to email and purchase some sample packs!

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Todd Louthain

Wow, great review.

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