Winsor & Newton Blending & Glazing Medium will slow the drying & improve the flow of your oil colours. Made with dammar varnish, linseed oil & mineral spirits, it improves transparency & dries to a hard gloss finish. You can use Winsor & Newton Blending & Glazing Medium not only for blending & glazing but also for stroke work, antiquing & staining. UK shipping by road only. Not available for International or Northern Ireland delivery.