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, and unsealed cork. Suitable for interior and exterior use. This varnish provides a tough and durable finish that resists cracking, peeling, and blistering. It is suitable for use on bare wood, hardboard, MDF, and unsealed cork, making it versatile for various projects. Can be used for indoor and outdoor joinery, including hard and softwood, doors, windows, garden furniture, and conservatories. It can also be used as a sealer for concrete.