PROJECT TIMELINE
Resin casting: working, demold and full-cure timeline
Plan the job around separate working, recoat, exposure and service milestones. The exact clock comes from the product you actually use.
Project sequence
- Condition materials and measure components precisely.
- Mix and pour within the working or process time.
- Leave the mold undisturbed through the demold milestone.
- Handle a newly demolded part cautiously.
- Delay machining or service until the relevant cure milestone.
Do not add the times blindly: Some milestones run from initial application while others begin after a later coat or step.
Products with relevant documented milestones
| Product | Manufacturer-stated minimum | Condition/source |
|---|---|---|
| Smooth-On Smooth-Cast 300 Bright white casting resin | 10 minutes | At manufacturer-stated conditions; temperature, humidity and film thickness can change drying time. |
| Smooth-On Smooth-Cast ONYX FAST Black casting resin, 100A:100B | 10 minutes | At 73°F (23°C); depends on mass and mold |
| Smooth-On Mold Star 16 FAST Platinum silicone, 1A:1B | 30 minutes | At room temperature, 73°F (23°C) |
| Smooth-On Smooth-Cast 305 Slower-setting casting resin | 30 minutes | At manufacturer-stated conditions; temperature, humidity and film thickness can change drying time. |
| Smooth-On Smooth-Cast 326 Clear amber casting resin | 1 hours | At manufacturer-stated conditions; temperature, humidity and film thickness can change drying time. |
| Smooth-On TASK 9 High-performance casting resin | 1 hours | At manufacturer-stated conditions; temperature, humidity and film thickness can change drying time. |
| Smooth-On Dragon Skin 10 FAST Platinum silicone, 1A:1B | 1.25 hours | At room temperature, 73°F (23°C) |
| Smooth-On Dragon Skin 10 NV Platinum silicone, 1A:1B | 1.25 hours | At room temperature, 73°F (23°C) |
| Smooth-On Crystal Clear 202 Water-clear casting resin | 1.5 hours | At manufacturer-stated conditions; temperature, humidity and film thickness can change drying time. |
| Smooth-On Smooth-Cast ONYX SLOW Black casting resin, 100A:100B | 1.5 hours | At 73°F (23°C); depends on mass and mold |
Record before you start
- Exact product and variant
- Application date and time
- Surface and ambient temperature
- Humidity or weather exposure
- Coat, bead or repair thickness