What is the difference between dry and cured?

Touch dry means the surface feels dry and is not tacky. Recoat time is when you can apply the next coat. Full cure is when the finish has reached maximum hardness and chemical resistance. A polyurethane may be touch dry in 4 hours but takes 30 days to fully cure.

Does temperature affect drying time?

Yes, significantly. As a rough rule, drying time doubles for each 10°C drop in temperature. Most finishes work best at 18-25°C. Below 10°C, many finishes will not cure properly.

Does humidity affect drying?

Yes. High humidity slows evaporation-based drying (varnish, lacquer) and can cause blushing in shellac and lacquer. However, water-based polyurethane actually needs some humidity to cure properly.

WoodCalcs

Finish Drying Time Calculator — Cure Time Estimator

Estimate drying and curing times based on finish type and conditions.

Finish Type

Temperature

Relative Humidity

How We Calculate This

Base drying times are adjusted for temperature and humidity.

Temperature factor: Drying approximately doubles for each 10°C below 20°C.

Humidity factor: Higher humidity above 50% extends drying times proportionally.

These are estimates only. Always check the manufacturer's instructions and test dryness before recoating.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify measurements and material quantities before cutting or purchasing.