Water and Oil-Based Paint
Paints are liquids that, when applied to a surface, dry to a solid film and impart color, protection and texture. Nothing spruces up a room faster than a new coat of paint, but the type you use depends on the surface you’re covering and the paint previously used, if any. The paint’s binder adheres to a surface and imparts durability, gloss and resistance to wear. The two main categories are oil-based and water-based paints.
Oil-based paints contain petroleum distillates and other organic solvents. They are often called alkyds and can contain various diluents, including ketones, esters, glycol ethers, alcohols, resins, aliphatics and aromatics. These paints adhere well, but can eventually oxidize and turn brittle, resulting in cracking, chipping and yellowing. Oil-based paints are preferred when you are covering chalked, or powdery surfaces, or ones that have several previous layers of oil paint. These paints take longer to dry, take longer to clean up and often have a strong odor. The solvents create a drag that slows application and results in thicker layers, which are useful when applying only one coat. If the solvent contains linseed oil, the paint may support mildew growth and therefore usually contain mildew-cides.