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A flexible black bituminous underwater coating for the economical protection of steel, typically narrowboat blacking. May also be used for application above the waterline and for repair and maintenance of existing bituminous paints. Provides a semi gloss finish. Touch dry after 8 hrs (at 25°C). Hard dry after 2 days. Coverage approx 1 L/10 m2 by brush or 5.3 m2 by spray. Thinners: No1 but should not be needed. Apply 4 - 5 coats.