Smooth-On

Feather Lite

Urethane plastic · US · manufacturer-sourced

Check your container: This countdown is for the Urethane plastic variant. Similar-looking versions may have different times.

How long before you can demold Smooth-On Feather Lite?

Short answer

Ready to demold: 2 hours after application.
Maker & casting resin

Cast-and-demold plan

Gel, demold and full cure are separate days

  1. Mix the Urethane plastic to ratio and pour
  2. Wait for the demold time
  3. Sand or finish after full cure

This product’s stated stages

  • Demold2 hours

Worth noticing: The manufacturer states only one timing here (demold, 2 hours); nothing else is inferred.

Common mistake: Demolding early and leaving a soft, tacky casting that never fully hardens.

Maker & casting resin

Project stage ladder

Demolding, handling, finishing and final use may occur at different times

ShapeSetFinishUse

For casting and prototyping, identify which stage the stated to demold 2 hours milestone actually unlocks. Earlier handling does not prove final cure.

Time demold and cure

When did you mix and pour?
Conditions that affect drying
Where?
Thickness

Stated times

  • Ready to demold2 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: Not stated in the data sheet
  • 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; read the product's technical bulletin before you pour.
  • Region US. Formulas can differ between countries; check your container.
  • Ready to demold: The chart gives no temperature; its cure column is the last time value in each row.
  • 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 Report outdated information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 Feather Lite
Variant
Urethane plastic
Region
US
Listed use
casting, prototyping
Timed stages recorded
demold
Source checked
2026-10-25

Documentation: Technical data sheet · Technical Data Chart (no revision date)

Condition attached to the stated time: The chart gives no temperature; its cure column is the last time value in each row.

About this product

Feather Lite is a urethane plastic on Smooth-On's technical data chart, listed with a pot life of 8.5 minutes and a cure time of 2 hours. This page uses only the chart values; mix ratio, hardness and release details come from Smooth-On's product bulletin.

Using this specific product

Smooth-On Feather Lite is listed here as the Urethane plastic version for casting and prototyping. 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 Urethane plastic; related versions can use different timing.
  • For casting and prototyping, pay particular attention to accurate mixing, mold material, mass and room temperature.
  • The chart gives no temperature; its cure column is the last time value in each row.

How to check readiness

Check the casting itself for flex or tack before demolding. Flex the mold away at one edge and stop if the casting bends, tears or remains tacky.

Avoid this mistake

Demold time is not necessarily full mechanical cure.

Compare with similar products

Keep going

Questions

How long before you can demold this product?

Smooth-On states: The technical data chart gives a cure time of 2 hours. Conditions: The chart gives no temperature; its cure column is the last time value in each row.. These are the manufacturer’s stated times, not a guarantee.

How does Feather Lite compare with others in its line on the chart?

On Smooth-On's technical data chart, Feather Lite lists a pot life of 8.5 minutes and a cure time of 2 hours. Its closest chart companion here, Plasti-Paste, lists a pot life of 8 to 10 minutes and a cure time of 24 hours.

What does the chart say about the pot life of Feather Lite?

The chart gives a pot life of 8.5 minutes for Feather Lite, which is too short to express in whole minutes on this page, with a cure time of 2 hours. Check the product bulletin before mixing a large batch.

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; read the product's technical bulletin before you pour. Follow the product label for your conditions.