Thinners are mixtures of solvents which are tailored to specific types of paint, such as antifouling, primers, boat paint and varnish.
There are thinners for antifouling paints, thinners for primers and thinners for one- and two-component boat varnishes. Universal thinner should never be used for yacht paints, as this may cause the boat paint to separate into different parts. The paint surface may also become tacky, matt or milky, or the entire yacht paint may remain soft and not harden.
The appropriate thinner for antifouling, primer or boat paint depends on the bonding agent and the desired properties of the paint (fast drying, good colour gradient, etc.). Always observe the manufacturer's instructions for the yacht paint used in order to add the appropriate thinner at the correct ratio.
Thinners with "slow" solvents are suitable for application with a brush and roller, because the paint can spread better. "Fast" solvents, on the other hand, are more suitable for spray application.