Paint Drying and Recoat Time Calculator

Times start from the reference condition on the tin, 25°C and 50% relative humidity.

Product typePick the closest class. We never name a single product.

Which coat is this?Coat one meets the substrate. Later coats sit on a sealed film.

Coat 1 Coat 2 Coat 3

Substrate porosityApplies to coat one only.

Bare or porous Sealed or previously gloss

Melbourne swings a long way between a still July morning and a dry February afternoon.

Air temperatureDegrees Celsius, in the shade beside the surface.

Relative humidityPer cent. Your phone weather app is close enough.

AirflowWindows open, a fan running, or a sealed room.

Still Normal Good

So we can tell you whether the second coat lands before you lose the light.

Time you finish this coat

Last usable lightStop working before dew forms on an exterior surface.

Safe to recoat after

3 h 0 min

Base times are the tin's 25°C figures. Every adjustment below is shown.

What this calculator assumes

Base touch dry, recoat and full cure times are the Australian reference figures measured at 25°C and 50% relative humidity, at the spread rate on the tin.
Temperature, humidity, airflow and porosity multipliers apply to touch dry and recoat only. Full cure is a chemical process and is reported unadjusted.
Temperature and humidity multipliers are interpolated linearly between the published points: 30°C 0.7, 25°C 1.0, 20°C 1.2, 15°C 1.6, 12°C 2.2, 10°C 3.0, and 40% 0.9, 50% 1.0, 65% 1.3, 75% 1.7, 85% 2.5.
Solvent-based and oil products raise the temperature multiplier to the power 1.2 and the humidity multiplier to the power 0.6, because solvent release is temperature led. Water-based products raise the humidity multiplier to the power 1.2, because water has to leave the film.
Coat one uses the porosity you chose. Coat two and later sit on a sealed film, so the sealed multiplier of 1.15 applies instead.
Hard dry is reported as the midpoint between touch dry and safe recoat. It is the point the film takes light handling, not the point it takes another coat.
Below 10°C and above 85% relative humidity are hard blocks. Do not apply. The film will not coalesce and the finish will fail.
Applied over a heated surface in direct sun, skinning happens faster than the film dries underneath. Work in the shade and follow the sun around the house.

Safe to recoat after

3 h 0 min

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