Definition - What does Nonvolatile Vehicle mean?
A nonvolatile vehicle is defined as the binding agent of a paint or coating that holds the pigments in place after all the solvents have evaporated. Unlike their volatile counterpart, the nonvolatile vehicle becomes part of the final dried film. The quantity of nonvolatile vehicle in a paint or coating can be expressed as either a weight or volume.
Corrosionpedia explains Nonvolatile Vehicle
Paints and coatings are comprised of solid and liquid components, both of which can be classified as volatile and nonvolatile. The volatile substances evaporate upon exposure to the atmosphere, while the nonvolatile matter remains to form part of the dried film coating.
The nonvolatile vehicle is a subset of the nonvolatile matter, which consists of the solid and liquid portions of the coating. The nonvolatile vehicle, which starts as a liquid, cures to provide adhesion to the substrate and bind the pigments. The nonvolatile vehicle determines various properties of the coating, such as durability, flexibility and gloss.