Flexible Resin
SLA elastomer, post-cure settings · US · manufacturer-sourced
How long should Formlabs Flexible Resin be left to cure?
Short answer
Cast-and-demold plan
Gel, demold and full cure are separate days
- Mix the SLA elastomer, post-cure settings to ratio and pour
- Wait for the demold time
- Sand or finish after full cure
This product’s stated stages Quoted at 140°F
- Curing period15 minutes to 1 hour
Worth noticing: The manufacturer states only one timing here (curing period, 15 minutes to 1 hour); nothing else is inferred.
Common mistake: Demolding early and leaving a soft, tacky casting that never fully hardens.
Project stage ladder
Demolding, handling, finishing and final use may occur at different times
For 3D printing and flexible parts, identify which stage the stated period 15 minutes to 1 hour milestone actually unlocks. Earlier handling does not prove final cure.
Time demold and cure
Your countdown
Stated times
- Curing period complete15 minutes to 1 hour
From Formlabs data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.
Manufacturer website: formlabs.com
Conditions & fine print
- Stated conditions: 140°F (60°C)
- Printed parts are washed and dried before post-cure. Follow the current Formlabs material data sheet for your printer and firmware.
- Region US. Formulas can differ between countries; check your container.
- Curing period complete: At 60°C in Form Cure.
- Entered from the cited manufacturer documentation. Check the current label for the exact formula and region. Report outdated information
- Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.
Confirm this is your product
Closely named formulas, colors and regional versions can use different times. Match these details to your container before starting a countdown.
- Exact listing
- Formlabs Flexible Resin
- Variant
- SLA elastomer, post-cure settings
- Region
- US
- Listed use
- 3D printing, flexible parts
- Timed stages recorded
- cure period
- Source checked
- 2026-10-25
Documentation: Technical data sheet copy · Form Cure settings page, last updated 8 June 2021
Condition attached to the stated time: At 60°C in Form Cure.
About this product
The original Flexible Resin, listed with a wide gap between its two settings: 15 minutes recommended and 60 minutes full at 60°C. Flexible 80A, its successor, is a single 10 minute cure.
Using this specific product
Formlabs Flexible Resin is listed here as the SLA elastomer, post-cure settings version for 3D printing and flexible parts. For casting resin, the useful question is not simply whether the surface looks finished—it is whether the exact next-action milestone shown above has been reached.
Before you start
- Confirm the package says SLA elastomer, post-cure settings; related versions can use different timing.
- For 3D printing and flexible parts, pay particular attention to accurate mixing, mold material, mass and room temperature.
- At 60°C in Form Cure.
How to check readiness
Check the casting itself for flex or tack before demolding. The Form Cure settings list a post-cure of 15 minutes (recommended) and 60 minutes (full).
Avoid this mistake
Demold time is not necessarily full mechanical cure.
Questions
How long should this product be left to cure?
Formlabs states: The Form Cure settings list a post-cure of 15 minutes (recommended) and 60 minutes (full). Conditions: At 60°C in Form Cure.. These are the manufacturer’s stated times, not a guarantee.
Why does Flexible Resin list both 15 and 60 minutes?
The settings page lists 15 minutes as recommended and 60 minutes as full, both at 60°C. It does not say which parts need the full setting.
What affects how long this product takes to dry or cure?
Printed parts are washed and dried before post-cure. Follow the current Formlabs material data sheet for your printer and firmware. Follow the product label for your conditions.