what is a varnish

Varnish is a clear, transparent, hard protective coating or film that is primarily used as a wood finish where the distinctive tones and grains in the wood are intended to be visible. It is not to be confused with wood stain, although it may be pigmented as desired. Varnish is sold commercially in various shades and finishes, including glossy, satin/semi-gloss, and flat sheens. Varnish is a centuries-old, slow-drying sealant composed of specific resins, oils, and solvents that creates a translucent, highly protective coating when applied to wood. It is different from other types of wood coatings, including polyurethane, shellac, and lacquer. Varnish cures into a hard, glossy, and transparent film, although you can purchase versions tinted in various sheens and hues. Its main purpose is to seal and protect wood products while showing off the wood’s distinctive grain and natural beauty. Varnish has a higher ratio of solids, making it more resistant to water and less susceptible to ultraviolet light than polyurethane.