Phaetus
Phaetus aeFlex™ TPU-85A-HF Filament 1kg Spool
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Phaetus aeFlex TPU-85A-HF — soft 85A flexible, built for speed
A Shore 85A flexible TPU in Phaetus's high-flow (HF) grade. It's noticeably softer and more rubbery than the 90A/95A TPUs most people start with, but the HF formulation is tuned to keep flowing at speed — Phaetus rates it for over 100 mm/s when paired with a capable direct-drive extruder. Good for gaskets, seals, grommets, vibration dampers, protective cases, RC tires, and any squishy functional part.
What it prints well
- Soft, grippy, high-elongation parts that need to bend and bounce back.
- Faster than typical soft TPU thanks to the high-flow grade — you don't have to crawl at 15 mm/s.
- Layer bonding and surface finish are good in the 85A-HF class when dry and run at moderate retraction.
Hardware you need
- Direct-drive extruder strongly recommended. 85A is soft enough that it buckles and jams in most Bowden setups. A short, well-constrained filament path matters more than raw temperature.
- No hardened nozzle needed. This is unfilled TPU — no glass or carbon fiber — so a standard brass nozzle is fine. (Only our glass/carbon-filled engineering lines need a hardened or DLC nozzle.)
- Heated bed helpful but gentle; smooth PEI or a glue stick gives clean release.
Temperatures (start here, then dial in)
- Nozzle: ~200-225C
- Bed: ~20-50C
- Density: ~1.16 g/cm3
These are typical values for the 85A high-flow TPU class. Confirm against Phaetus's published TDS for this exact spool and tune in 5C steps.
Drying — do not skip this
TPU is hygroscopic and re-absorbs moisture fast. Wet filament prints stringy, rough, and weak. Dry before use: ~50-65C for 4-6h (or 70C for ~7h) in a filament dryer or oven, then print straight from a dry box or reseal with desiccant. If a spool has been open on the shelf, dry it first — every time.
Stock-clearance pricing. New, factory-sealed 1kg spool, Black, 1.75mm.
Shipping & Returns
Returns:
Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.
Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.
Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.
Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.
To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.
Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.
Order alterations and cancellations:
Once an order has ben submitted, no alterations can be made. This includes adding or removing items or canceling orders. You are welcome to return an order, once you have taken receipt, following the returns procedure listed above.
Shipping:
US Shipping is via UPS or USPS. The way it is set up shows the least expensive options for standard, priority and express shipping. I can not take special requests for specific carriers at this time.
International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs.
I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost.
If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement.
Addresses are verified through Shopify, but the customer is still responsible for inputting their address in the correct format. Any returns or lost shipments, due to incorrectly addressed packages, are the responsibility of the customer.
