Sadolin Extra is a durable woodstain for all softwood and hardwood apart from decking or areas subject to heavy wear/abrasion. It is particularly suitable for joinery such as doors and windows, where its flexible nature and water repellency provide long lasting protection. For optimum durability on new wood, the use of Sadolin Classic as a base coat is recommended, particularly when treating hardwoods. Protect your softwood and hardwood surfaces with Sadolin Extra, a high-quality wood stain ideal for joinery such as exterior doors and windows. Its flexible nature and water repellence offer long-lasting protection against the elements. Rosewood Exterior Wood Stain With UV Protection Sadolin Extra Durable 2.5 Litre. Sadolin Extra Durable Exterior Wood Stain Rosewood is a premium quality wood stain ideal for protecting exterior softwood and hardwoods. Formulated to offer a highly flexible finish that will resist flaking, cracking, and peeling whilst protecting against UV damage. The high level of water repellency provides long-lasting protection for exterior doors windows and doors. This wood stain is durable and hard-wearing with a semi-gloss finish, offering premium protection on new wood and advanced UV protection. Not suitable for decking or areas subject to heavy wear or abrasion.