An alkyd zinc phosphate holding coat for use on steelwork for canal boats and leisure craft where primer is to be left exposed. It is available in Red Oxide, with a semi-gloss finish. It is used on newly built metal hulls where the primer is to be left for prolonged periods before top coating; e.g. during fitting-out. It provides additional anticorrosive protection during exposure and contains zinc phosphate anticorrosive pigmentation. Formulated as part of the total Rylard system, this is an ideal metal holding coat for finishing with Rylard Undercoat and Rylard Plus Enamel.