Hempel's Classic 71220
Marine alkyd · GB · manufacturer-sourced
How long before you can recoat Hempel's Classic 71220?
Short answer
Launch-ready plan
Weatherproof, in-water and underway are different dates
- Prepare and apply the Marine alkyd
- Keep it dry for the stated time
- Launch or use only after the stated cure
This product’s stated stages Quoted at 68°F
- Safe to touch15 minutes
- Ready for another coat4 hours
- Fully dry4 hours
- Immersion-ready1 day
Worth noticing: Safe to touch at 15 minutes; immersion-ready at 1 day.
Common mistake: Launching on the first dry day; most marine products need the immersion time stated.
Water-exposure plan
Splash, filling and continuous immersion are not equivalent
Splashes or dampness can use a different milestone.
Filling, launching or immersion requires the exact water milestone.
Use the Marine alkyd directions for boat hull and marine paint; do not infer immersion readiness from touch-dry time.
Time the marine cure
Your countdown
Stated times
- Safe to touch15 minutes
- Ready for another coat4 hours
- Immersion-ready1 day
- Fully dry4 hours
From Hempel data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.
Manufacturer website: hempel.com
Conditions & fine print
- Stated conditions: 68°F (20°C)
- Times depend on temperature, humidity, film or bead thickness and airflow. Follow the current data sheet and label.
- Region GB. Formulas can differ between countries; check your container.
- Safe to touch: It is 30 minutes at 10°C and 9 at 30°C.
- Ready for another coat: There is no maximum.
- Immersion-ready: The maximum is 1 month.
- Fully dry: It is 8 hours at 10°C and 2 at 30°C.
- 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 Report outdated information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
- Hempel Hempel's Classic 71220
- Variant
- Marine alkyd
- Region
- GB
- Listed use
- boat hull, marine paint
- Timed stages recorded
- touch, recoat min, immersion, full dry
- Source checked
- 2026-10-25
Documentation: Technical data sheet · Product data sheet, Oct 2026
Condition attached to the stated time: It is 30 minutes at 10°C and 9 at 30°C.
About this product
A marine paint with a launch window rather than a point: at least 24 hours at 20°C and at most 1 month before immersion.
Using this specific product
Hempel Hempel's Classic 71220 is listed here as the Marine alkyd version for boat hull and marine paint. For repairing marine or RV equipment, 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 Marine alkyd; related versions can use different timing.
- For boat hull and marine paint, pay particular attention to substrate preparation, temperature and water exposure.
- It is 30 minutes at 10°C and 9 at 30°C. There is no maximum. The maximum is 1 month. It is 8 hours at 10°C and 2 at 30°C.
How to check readiness
Check the immersion or launch milestone—not just touch-dry time. Touch only a hidden edge first; a dry surface can conceal a soft layer underneath. Before recoating, confirm the first coat matches the manufacturer’s stated condition; if the maximum window passed, check whether sanding is required. Continuous immersion is more demanding than splashes; wait for the specific immersion milestone.
Avoid this mistake
Launching too soon can expose an incompletely cured film continuously.
Compare with similar products
- Compare with Interlux Micron 66 AntifoulingRecoat: 4–12 h there, 4 h here.
- Compare with Interlux Micron WARecoat: 4 h there, 4 h here.
Questions
How long before you can recoat this product?
Hempel states: The sheet gives touch dry at 15 minutes at 20°C. Conditions: It is 30 minutes at 10°C and 9 at 30°C.. The sheet gives a minimum overcoat interval of 4 hours at 20°C. Conditions: There is no maximum.. The sheet gives a minimum of 24 hours before immersion at 20°C. Conditions: The maximum is 1 month.. The sheet gives surface dry at 4 hours at 20°C. Conditions: It is 8 hours at 10°C and 2 at 30°C.. These are the manufacturer’s stated times, not a guarantee.
What is the launch window for Hempel's Classic 71220?
The sheet gives 24 hours minimum and 1 month maximum at 20°C.
How long before this product can be immersed in water?
Hempel states: The sheet gives a minimum of 24 hours before immersion at 20°C. Conditions: The maximum is 1 month.. These are the manufacturer’s stated times, not a guarantee.
How long until this product is safe to touch?
Hempel states: The sheet gives touch dry at 15 minutes at 20°C. Conditions: It is 30 minutes at 10°C and 9 at 30°C.. These are the manufacturer’s stated times, not a guarantee.
How long until this product is fully dry?
Hempel states: The sheet gives surface dry at 4 hours at 20°C. Conditions: It is 8 hours at 10°C and 2 at 30°C.. These are the manufacturer’s stated times, not a guarantee.
What affects how long this product takes to dry or cure?
Times depend on temperature, humidity, film or bead thickness and airflow. Follow the current data sheet and label. Follow the product label for your conditions.