750ml of Wilko exterior undercoat in Dark Grey. Our outside undercoat has been specially developed to give 6 years* all weather protection to exterior wood and metal. It is more durable than conventional undercoat, making it less prone to cracking and blistering. . The perfect base for a finishing gloss topcoat! Dry in 16 24 hours. *When used as an undercoat to Wilko outside exterior quick dry satin on sound, prepared surfaces. Specially formulated to give all weather protection to exterior wood and metal. Provides perfect base for finishing gloss topcoat. High VOC content. Solvent based paint. WARNING Flammable. Irritant May produce an allergic reaction. Keep out of reach children. Always read instructions. Coverage up to 9 square meter.