Outdoor Water Based Spar Urethane (brush)
Water-based (all sheens) · US · not yet reviewed
Short answer
Ready for another coat: 2 hours after application.
Light use: 1 day after application.
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Stated times
- Safe to touch30 minutes
- Ready for another coat2 hours
- Light use1 day
- Normal use3 days
From Varathane (Rust-Oleum) data sheet · checked 2026-10-24. Anything not listed isn’t stated by the manufacturer.
Conditions & fine print
- Stated conditions: 70–80°F and 50% relative humidity
- Apply between 55–90°F with humidity below 85%. If a coat has sat more than 12 hours, sand lightly before recoating. The aerosol version has a 1-hour recoat.
- Temperature range: 55°F to 90°F
- Region US. Formulas can differ between countries; check your container.
- Safe to touch: 70–80°F and 50% RH
- Ready for another coat: Brush application; aerosol is 1 hour
- Entered from the manufacturer source; second review pending. Report outdated information
- Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.
Questions
How long before Outdoor Water Based Spar Urethane (brush) is ready for another coat?
Varathane (Rust-Oleum) states: Allow the finish to dry a minimum of 2 hours before recoating (brush). Conditions: Brush application; aerosol is 1 hour. This is the manufacturer’s stated time, not a guarantee.
How long before Outdoor Water Based Spar Urethane (brush) is light use?
Varathane (Rust-Oleum) states: Allow finish to dry 24 hours before light use. This is the manufacturer’s stated time, not a guarantee.