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.
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
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Too bad 
I always wanted to use this material for its properties but the workflow was too cumbersome!
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we just bought some but dont know when we are going to use it lol
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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.
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 |
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Hah - I actually still have some bottles from the beta test period of these resins…they’re just sitting here unused 
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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.
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are they still liquid? shake them. I’ll buy them if they’re still liquid
I tossed them out a while ago when cleaning out my shop unfortunately they sat for years lol
I used this resin extensively for end use applications. I found out this past week as I went to re-order that it’s no longer available. As a bit of history, I was (rather relentlessly) chased down by the sales team to upgrade to a Form 4 last year but did not feel compelled to do so as our form 3+ printer was working exceptionally well with this resin for our applications. So, here I am now in March 2026 with no resin availability and a form 3+ machine that won’t work for our use cases with any of the remaining materials. This is exceptionally disappointing as the only viable path is to buy a brand new printer to gain access to the new tough series resins. An email notification to your existing PU resin buyers would have been nice…
@AQUATICLIFE I’m sorry to hear the sunsetting is causing issues for you, and that it came as a surprise. We informed users in advance via notifications on PreForm, on the webstore, as well as via email - it’s possible though that you were not included in the email notification if your last purchase was too long ago. We’re very sorry for that!
I’m contacting you via DM as well so we can look into possible solutions.
