Perfect for a solvent-based interior varnish which gives a tough & durable finish. it can be used over bare wood & previously stained or varnished surfaces this clear polyurethane varnish from the Dulux Trade range can be applied to interior bare or varnished surfaces or over wood dye using a brush. The low odour non yellowing varnish takes 16-24 hours to dry and will cover 16 m² per litre on average.