Varnish is a blend of solvent, colour and resin and can come in different colours and sheen levels. The products listed below are for interior use only. There are very few clear varnishes available for exterior use because they are not very suited to the wet climate in the UK. The best ones are listed in our exterior section. We also stock Polyvine Decorators Varnish and other multipurpose clearcoats which are also suitable for wood.