Drying time is dependent on temperature and humidity. Higher temperatures and low humidity make paint dry quicker than low temperatures and high humidity.
There are two drying times to consider when choosing or using bottom paint:
- Dry time to overcoat (or recoat) - The length of time for a freshly applied coat of paint to reach a drying stage at which another coat can be applied without incurring any surface irregularities such as loss of adhesion or lifting. Always recoat according to the manufacturer's recommendations on overcoating times, which usually vary based on temperature.
- Dry time to launch - The length of drying time the freshly painted boat must remain out of the water before launching.
Always check the manufacturer's technical data to determine dry time to launch, which can vary based on the type of bottom paint used.
For example, copolymer ablative paints dry faster, have shorter overcoating times, and allow launching up to 18 months after painting. Other types of ablative bottom paint dry more slowly, have longer overcoating intervals, and require launching within 2 weeks of application.