Rigid 4000 Resin
SLA glass-filled resin, post-cure settings · US · manufacturer-sourced
How long should Formlabs Rigid 4000 Resin be left to cure?
Short answer
Cast-and-demold plan
Gel, demold and full cure are separate days
- Mix the SLA glass-filled resin, 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
Worth noticing: The manufacturer states only one timing here (curing period, 15 minutes); 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, stiff parts, and jigs, identify which stage the stated period 15 minutes milestone actually unlocks. Earlier handling does not prove final cure.
Time demold and cure
Your countdown
Stated times
- Curing period complete15 minutes
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 80°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 Report outdated information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 Rigid 4000 Resin
- Variant
- SLA glass-filled resin, post-cure settings
- Region
- US
- Listed use
- 3D printing, stiff parts, jigs
- 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 80°C in Form Cure.
About this product
A glass-filled resin for stiff parts, post-cured quickly but hot: 15 minutes at 80°C. Grey Pro is listed at the same schedule.
Using this specific product
Formlabs Rigid 4000 Resin is listed here as the SLA glass-filled resin, post-cure settings version for 3D printing, stiff parts, and jigs. 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 glass-filled resin, post-cure settings; related versions can use different timing.
- For 3D printing, stiff parts, and jigs, pay particular attention to accurate mixing, mold material, mass and room temperature.
- At 80°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.
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. Conditions: At 80°C in Form Cure.. These are the manufacturer’s stated times, not a guarantee.
Why is Rigid 4000's post-cure short but at 80°C?
The settings page lists 15 minutes at 80°C. It does not explain the choice; Grey Pro Resin has the same listing.
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.