Epsilon PRO
Epoxy coating · US · manufacturer-sourced
How long before you can demold Smooth-On Epsilon PRO?
Short answer
Two-part cure ladder
Pot life, set and full cure all run off the mix time
- Mix the Epoxy coating in the exact ratio
- Work inside the pot life
- Do not load until the stated cure
This product’s stated stages Quoted at 73°F
- Working time ends22 minutes
- Demold16 hours
Worth noticing: Working time is only 22 minutes; the next stated stage, demold, is 16 hours.
Common mistake: Mixing a large batch in a warm room; the pot life is shorter than the sheet suggests.
Bond-strength path
Assembly, handling and full load are different stages
Time the epoxy cure
Your countdown
Stated times
- Working time ends22 minutes
- Ready to demold16 hours
From Smooth-On data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.
Manufacturer website: smooth-on.com
Conditions & fine print
- Stated conditions: 73°F (23°C)
- Pot life and cure time shorten in warm rooms and with bigger batches. Follow the current technical bulletin for mix ratio, mixing and release agents. The chart is a summary.
- Region US. Formulas can differ between countries; check your container.
- Working time ends: At 73°F (23°C); pot life by ASTM D-2471.
- Ready to demold: At 73°F (23°C).
- 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 Report outdated information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
- Smooth-On Epsilon PRO
- Variant
- Epoxy coating
- Region
- US
- Listed use
- epoxy coating, clear coating, tabletops
- Timed stages recorded
- tooling, demold
- Source checked
- 2026-10-25
Documentation: Technical data sheet · Technical Data Chart (no revision date)
Condition attached to the stated time: At 73°F (23°C); pot life by ASTM D-2471.
About this product
Epsilon PRO is a coating epoxy on Smooth-On's chart: 22 minutes of pot life, 35 minutes of thin-film working time and a 16 hours cure at 73°F. Its thin-film window of 35 minutes is the shortest of the three Epsilon rows, though its pot life is mid-range.
Using this specific product
Smooth-On Epsilon PRO is listed here as the Epoxy coating version for epoxy coating, clear coating, and tabletops. For mixing and curing epoxy, 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 Epoxy coating; related versions can use different timing.
- For epoxy coating, clear coating, and tabletops, pay particular attention to mix ratio, batch size, temperature and pour thickness.
- At 73°F (23°C); pot life by ASTM D-2471. At 73°F (23°C).
How to check readiness
Check the coolest or thickest part for firmness before sanding, demolding or loading. The technical data chart gives a pot life of 22 minutes. Flex the mold away at one edge and stop if the casting bends, tears or remains tacky.
Avoid this mistake
A larger batch can heat faster while a thin film may cure more slowly.
Questions
How long before you can demold this product?
Smooth-On states: The technical data chart gives a pot life of 22 minutes. Conditions: At 73°F (23°C); pot life by ASTM D-2471.. The technical data chart gives a cure time of 16 hours. Conditions: At 73°F (23°C).. These are the manufacturer’s stated times, not a guarantee.
How long can I work a thin film of Epsilon PRO?
The chart gives a thin-film working time of 35 minutes, against a pot life of 22 minutes in a mass. Cure is 16 hours at 73°F.
How does Epsilon PRO compare with the other Epsilon coatings?
The chart lists three: 101 Fast (15 minute pot life, 16 hour cure), 102 Medium (30 minutes, 24 hours) and PRO (22 minutes, 16 hours).
How long do I have to work with this product?
Smooth-On states: The technical data chart gives a pot life of 22 minutes. Conditions: At 73°F (23°C); pot life by ASTM D-2471.. These are the manufacturer’s stated times, not a guarantee.
What affects how long this product takes to dry or cure?
Pot life and cure time shorten in warm rooms and with bigger batches. Follow the current technical bulletin for mix ratio, mixing and release agents. The chart is a summary. Follow the product label for your conditions.