Johnstone's 6 Year Exterior Undercoat has been specially developed to be used in conjunction with Johnstone's Weatherguard 6 Year Exterior Gloss to provide an exceptionally durable and long lasting high gloss finish for exterior wood and metal|The special formula retains flexibility for longer than traditional undercoats and is resistant to blistering, cracking & peeling|Coverage: 12m2 (metres squared per litre)|Touch dry: 4-6hrs|Oil Based