Flex TPU 85A 3D Printer Filament, ISO 10993 Tested, Black, 1kg | High Flexibility & Toughness, High Flow & Speed, Moisture-Resistant Aluminum Bag, for Footwear, Protective Gear

I like this filament, it produces a better rubber feel compared to 95A. I run it slow so large prints take a while, but its worth the wait. I make sure to dry it for 48 hours prior to printing, and print it at 240*C.

EDIT: I'm updating to 5 stars. Customer service is top notch and very responsive. They provided me a new roll and I'm successfully printing now. I bought this TPU as I needed something softer than A95. Initially it printed great and I was able to print a couple of parts I needed on my K1 max. However, I think I got a roll that is spooled way too tight. As I started getting into the roll it became more difficult to print as it came off the spool. It would just stretch leaving extreme under-extrusion on the part. On one of my printers, CR6SE with LGX Lite, I went straight from a top mounted spool holder to the extruder to reduce the length and it still had issues pulling it off this spool. I may have just been given a bad roll but at this price I wont be buying more. Follow there instructions for best results. They have a guide on their web site.

I previously printed with Ninjaflex TPU, but at $90 a roll currently I knew I needed to try something different. There aren't many cheap options for 85A TPU in 1.75. I decided to try this in my Bambu Labs X1C. 95A is too plasticy for my application so I avoid it. At first it wasn't doing well, but I eventually found their suggested method on their website and now it prints much cleaner than Ninjaflex. I will say Ninjaflex had a more grippy softer rubber feel, but this one still does the job for me and the consistent print quality makes it worth it. When using an X1C you CANNOT use the AMS with TPU, it's just not stiff enough. I used to feed my Ninjaflex from a Sunlu dryer/storage unit. That was fine but it didn't cut it with the Siraya. As their instructions say: Feed from external spool holder (my Sunlu dryer/box with rolloers is fine) Do not use a PTFE tube Feed directly into the top of the X1C to the extruder - again no PTFE tube! I printed some small wedges that keep the back half of my top glass cracked about 1/4" and it allows me to keep the AMS on top as well.

Since I got the 85A, it was hard to print with my Anycubic Kobra S1. It’ll do but you’ll need to make a jig for it since friction gets the best of it in the filament tube. But, it prints at amazing quality and is pretty darn squishy! I would highly recommend. Thanks!

I’ve been printing with Siraya Tech Flex TPU (85A Shore) and overall, it’s a solid choice for flexible parts. The filament delivers excellent elasticity and toughness—perfect for footwear prototypes, protective gear, and other functional prints. It flows well at higher speeds compared to many TPU brands, and the moisture-resistant packaging is a nice touch for storage. Print quality is great once you dial in the settings. Layer adhesion is strong, and the finished parts feel durable and smooth. However, TPU can be tricky, and this filament is no exception—you’ll need to fine-tune retraction and speed to avoid stringing. It’s not quite “plug and play,” but that’s expected for flexible materials. The ISO 10993 compliance is a big plus for projects requiring biocompatibility. Overall, this is a high-quality TPU filament that performs well if you’re willing to spend a little time on setup.

I have a Bambu Lab H2 series printer and this 85A printed better than the Bambu 85A TPU filament. Using the standard Bambu 90A print profile I lowered the nozzle temp as indicated on the packaging and the first print came out just fine. I like it - also the edges of the cardboard spool are nicely sealed making it roll smooth.

Just to keep things basic, I ran 3mm/s³ @ 230c. It started out fine but ~20 layers up I was seeing kinda crazy underextrusion. Canceled the part, thought 'why?'. I print 95A all the time, but this came out so bad I could pull it apart with the slightest effort. Apparently even though my spool could readily spin. It was still too much resistance, switching things up and getting a bearing-based spindle holder made all the difference in the world even though it made the entry to my bowden tube less than ideal. Just the act of getting this stuff off the spool is enough elastic-stretch, to totally bugger things up. Other reviewers are NOT exaggerating. It already complies easily, and is slick, so the moment your direct-drive causes it to stretch, it gets thinner between the extruder gears, so suddenly it almost completely loses grip and the ability to feed further. Kinda wild we are printing with rubber-spaghetti in the first place, tbh.

Worst TPU we have tried. Even after drying it for over 40 hours, it ended up spaghetting and clogging our bamboo P2S. There are a better filaments out there. It’s also horribly wound and way too stretchy, so difficult to feed reliably. Because of the need for long drying, we ended up being four days outside the return window by the time we got around to printing with this junk. Not happy.

The filament itself is great, but it was a terrible idea to put such a difficult to feed filament on a cardboard spool. My spool was very minorly damaged, so the filament wasn't feeding properly from my Creality Space Pi drier, so I had to reload it onto a spare plastic spool I had.

This is very soft TPU, ideal for stuff like rubber seals and rc car tyres. It is smooth and shiny and has an impressive amount of strength. It can be stretched quite a lot, you have to work quite hard to tear it so I feel that it could be a long lasting material for seals and tyres etc. A word of caution - this will not work in all machines. Its so soft that to get it to feed into the extruder I had to bypass the Bowden tube altogether as it creates too much friction. On my Creality K1 Max I can remove the top so I fed it directly into the extruder and left the top off of the machine. You then have to release the tension on the filament as it enters the extruder or it will crush the filament and jam up before it even enters. If you have anything other than a direct drive extruder forget it. You just can't push this stuff through Bowden tube it physically won't go. Dual extruder is a MASSIVE advantage. If you have the ability to extrude both this and PETG/PLA at the same time then youre laughing. Use the PETG/PLA for the support structure and print the object on top of that. Printing a support structure made of this TPU and then the model on top won't work, you won't get the two apart without a fight I promise you. All that aside it is really good filament so ill be ordering this again in the future.

Siraya Tech Flex TPU 85A : Un TPU 85A exceptionnel ! Je suis extrêmement satisfait de ce filament Siraya Tech Flex TPU 85A. C'est un excellent choix pour quiconque cherche un matériau à la fois souple et résistant. Qualité d'impression et Compatibilité Le niveau de flexibilité (dureté 85A) est parfait pour des pièces nécessitant une bonne élasticité sans être trop "mou" à l'impression. J'ai obtenu de très bons résultats en l'utilisant sur mon imprimante Creality K1 Max. Il s'imprime étonnamment bien, même à une vitesse de 30 mm/s pour le remplissage, avec une adhérence entre les couches remarquable et des impressions propres et fiables. C'est un excellent point pour un filament flexible ! Conseil d'utilisation : L'importance du séchage Un point crucial à noter pour réussir vos impressions : ce TPU, comme beaucoup de flexibles, est très sensible à l'humidité. Il est impératif de s'assurer que le filament est parfaitement sec avant et pendant l'utilisation. J'ai dû le passer au sèche-filament pour obtenir des performances optimales. Si le filament n'est pas sec, vous risquez d'avoir des bulles, des défauts de surface et une mauvaise extrusion. Une fois sec, il s'imprime à merveille. Verdict C'est un TPU que je recommande vivement, en particulier aux utilisateurs d'imprimantes rapides comme la K1 Max, à condition de faire très attention à son séchage. La qualité Siraya Tech est au rendez-vous. C'est un excellent rapport qualité-prix pour des pièces techniques ou des prototypes souples !

Best TPU hands down. Prints with excellent consistency and the feel of the finished prints is excellent. Recommend going a bithotter thanthe 230 on the roll, sticks well to a warm bed. 10/10 will buy again

"# Siraya Tech Flex TPUフィラメント レビュー 3Dプリンターで柔軟性が必要な部品を自作したいと考え、複数のTPU製品を検討した結果こちらを選択しました。NinjaTek Cheetahと迷いましたが、ISO 10993認証と高流量対応という仕様に魅力を感じました。 実際に2ヶ月間毎日のように使用して驚いたのは、85Aショアという硬度の割に非常にしなやかで、クッション性に優れている点です。靴のインソール代わりになる保護具を複数製作しましたが、素足で触った時の肌触りが良く、繰り返し曲げても劣化が見られません。印刷時の安定性も良好で、詰まりのトラブルがほぼありませんでした。アルミバッグの密閉性も実感でき、開封から2ヶ月経った今も吸湿の心配がありません。 ただし、印刷速度は通常のPLAより落とす必要があり、私の環境では40mm/s程度が限界でした。急ぎの案件には向きません。 柔軟性と耐久性の両立が必須な日用品や保護具の自作を考えている方に、強くおすすめできる製品です。一方、速度重視や複雑な細部表現が必要な用途には不向きかもしれません。"