Sunsetting PU Rigid 650 and PU Rigid 1000 Resin

Formlabs News
1

Forum Community,

We want to let you know that we will sunset PU Rigid 650 Resin and PU Rigid 1000 Resin on August 8th, 2025.

04212022_PU 650 1000 HERO_190_SH-Standard
04212022_PU 650 1000 HERO_190_SH-Standard1920×1117 162 KB

These resins represented a significant departure from our typical materials, requiring a more involved workflow and equipment outside the standard Formlabs ecosystem. While the final parts delivered excellent mechanical properties, the limited pot life, fine tuning required, and overall workflow complexity made them less successful for users.

That said, if you’re still looking to make polyurethane parts, SLA can still be a great tool. Two workflow solutions include:

You can find more details on all resins being sunset on our Support site.

Thanks to this community for continuing to share your product and workflow insights - your feedback directly shapes the products we bring to life! Don’t hesitate with questions.

—The Formlabs Team

3 Likes
2

Too bad :pensive_face: I always wanted to use this material for its properties but the workflow was too cumbersome!

3 Likes
3

we just bought some but dont know when we are going to use it lol

1 Like
4

Awww, well if you’re curious, by all means give it a try! It’s certainly possible to get great results from it, but as we mentioned, there are some additional complexities that could lead to variable results.

Also, sunsetting from an availability standpoint means it will be on sale until Aug 8th, so anyone who has intended uses after that date, feel free to order more before then.

For those diving in because you have it or wish to try, here are our main workflow resources:

As I shared above, workflow for PU Rigid 1000 + 650 Resins are more complex than other Formlabs SLA materials. Formlabs recommends the purchase of additional third-party supplies to ensure printing success with polyurethane resins.

Formlabs recommends the use of a dry cabinet for improved climate and moisture control while printing and storing PU Rigid 650 Resin and PU Rigid 1000 Resin.

Printer inside dry cabinet

There are multiple possible workflows when printing with a Formlabs PU Rigid 1000 + 650 Resins, depending on your needs and available resources. You can print with a dry cabinet or in ambient conditions, and you can print using automatic resin dispensing (as with other Formlabs resins) or by manually filling your resin tank (not available on the Form 2).

Workflow Method Advantages Considerations When to use
Recommended Automatic filling in dry cabinet Best results and easy workflow Requires dry cabinet Frequent printing with PU Rigid 1000 Resin
Low cost Automatic filling in ambient conditions Low cost and simple Short pot life Printing in ambient conditions
Modified Manual dispensing in dry cabinet Extends resin pot life Requires dry cabinet and fine tuning may be necessary Printing intermittently or printing the same part repeatedly
1 Like
5

Hah - I actually still have some bottles from the beta test period of these resins…they’re just sitting here unused :upside_down_face::cry:

2 Likes
6

Always wanted and excuse to use it, but never got an application that justified the workflow. I always wound up printing a master and casting.

2 Likes