Subscribe to our newsletter. Get your site now Storing Paints Paint in tubes can easily dry out but there are a couple of tricks you can use to help prevent this problem. Always make sure that there is no paint in the threads before replacing the cap. Metal is likely to stick to the top of the tubes. A little lubricating jelly or glycerin painted on the threads of the tube will also help keep the cap from sticking.
Mold can form in jars of acrylic paints that haven t been used for a while.
This bacterial growth can be minimized if you take a few precautions. Keep jars tightly sealed when not in use. Boil the water before use. This kills the bacteria. The other alternative is to use distilled water.