Varnish is a transparent, hard, protective finish primarily used in wood finishing but can be used on other materials. Varnish is a combination of a drying oil, a resin, and a thinner or solvent. Varnish finishes are usually gloss although some have satin or semi-gloss finishes by using flatting agents. Varnish has little or no colour, is transparent, and has no added pigment. Varnishes are applied over wood stains as a final step to achieve a gloss and protection. Solo carry some products which a combined stain and varnish in one.