Smooth-On XTC-3D High Performance Coating
Two-part epoxy coating · US · not yet reviewed
How long does Smooth-On XTC-3D High Performance Coating take to dry?
Short answer
Project stage ladder
Demolding, handling, finishing and final use may occur at different times
For maker resin, identify which stage the stated to touch 2 hours milestone actually unlocks. Earlier handling does not prove final cure.
Calculate the next project stage
Stated times
- Safe to touch2 hours
- Ready to sand4 hours
- Full cure1 day
From manufacturer source · checked 2026-10-25.
Conditions & fine print
Drying time can change with temperature, humidity, film thickness and surface conditions.
Using this specific product
Smooth-On XTC-3D High Performance Coating is listed here as the Two-part epoxy coating version for maker resin. 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 Two-part epoxy coating; related versions can use different timing.
- For maker resin, pay particular attention to accurate mixing, mold material, mass and room temperature.
- At manufacturer-stated conditions; temperature, humidity and film thickness can change drying time.
How to check readiness
Check the casting itself for flex or tack before demolding. Confirm the surface is dry and ready before continuing. Touch only a hidden edge first; a dry surface can conceal a soft layer underneath. Ready to sand in approximately 4 hours. Reserve full cure for demanding use, chemicals, washing, immersion or load—not merely gentle handling.
Avoid this mistake
Demold time is not necessarily full mechanical cure.
Questions
How long does this product take to dry?
Becomes tack-free in approximately 2 hours. Ready to sand in approximately 4 hours. Allow 24 hours for full cure. Times vary with temperature, humidity, thickness and surface conditions.
What affects this product dry time?
Drying time can change with temperature, humidity, film thickness and surface conditions.