As long as the paint is unopened, experience has shown that they keep for a very long time. Much longer than the stated best-before date. Usually many years. However, once the paint bucket has been opened or even opened, the shelf life depends heavily on the type of paint. Here is a brief overview:
1. interior emulsion paints: These can start to smell unpleasant after just a few days or weeks. These paints are now free from preservatives and are therefore very sensitive to even the smallest impurities.
2. exterior dispersion paints: Here, preservatives are used in the paint so that it will keep for a long time even when opened (usually many years).
3. silicate emulsion paints, silicate paints, lime paints: Due to their naturally high alkalinity, these paints have a very long shelf life (usually many years). However, if there is only a little paint left in the bucket, it is advisable to repot it. Otherwise the colour may dry out. Alternatively, you can add a little water for storage without stirring.
4. solvent-based paints and varnishes: very long-lasting (usually several years).
5. Water-based paints and varnishes: there are usually still some preservatives in the paint, so that the paint can last for several months once opened. Always important for opened paint buckets: Always seal well for storage.