Compass Universal Primer is a primer and bonding agent for all Compass antifouling products below the waterline. It can also be used on steel and fibreglass and has an anti-corrosive and preserving function, although it is not recommended for use on aluminium. Waiting time before second coat: approx. 3 hours. Waiting time until antifouling coat: approx. 3 hours. Recommended number of coats for new boats: 3-5 coats. Recommended number of coats for refits: 1-2 coats. Colour: Silver. Coverage: 7.5 m2/l. Available in: 750 ml / 2.5 litres.