Johnstone's Exterior Primer Undercoat 750ml Brilliant White Johnstones Exterior Quick Dry Primer Undercoat has been specially developed to be used in conjunction with Johnstones Exterior Quick Dry Satin. It provides an exceptionally long lasting finish for exterior wood and metal. The water based formula resists blistering, cracking and peeling and has low odour and quick drying properties. For an optimum 6 year life use with Johnstones Exterior Quick Dry Satin. Weather protection Crack and peel resistance 6 Year Life Due to geographical locations we are unable to deliver to: Isle of Wight, Isle of Man and Ireland.