Ronseal Crystal Clear Outdoor Varnish is perfect for protecting wood while maintaining its natural color. It offers weather protection and resists yellowing over time, unlike traditional varnishes. This outdoor varnish is rainproof within 1 hour. For best results, apply on a warm, dry day (above 10°C) to clean and dry wood. It is recommended to wear a face mask to avoid inhaling dust. Preparation for stained or varnished wood: Sand the wood thoroughly to ensure the varnish adheres well. Clean with white spirit and allow to dry. Preparation for new wood: Lightly sand the wood, then clean off any dirt or dust with white spirit and allow to dry. Application: Apply 3 coats, allowing 6 hours drying time between each coat. Lightly sand the wood before the final coat for better adhesion and a smoother finish. Coverage: 16.0 square meters per litre. Number of coats: 3. Application method: Brush. Drying Time: 1 hour. This Ronseal RSLCCODVS250 Crystal Clear Outdoor Varnish features a satin finish and comes in a 250ml size.