A water-based, non-yellowing polyurethane varnish that is tough and durable and will resist cracking, peeling and blistering. Can be used on bare wood, hardboard, MDF, unsealed cork. For interior and exterior use. This varnish is suitable for outdoor and indoor joinery in both hard and softwood, doors, windows, garden furniture and conservatories, and can also be used as a sealer for concrete. It has low odour, is non-toxic, and resists alcohol and boiling water, providing long-lasting wood protection.