Wessex Chemicals Hull white is a high quality cleaner designed for use on fibreglass surfaces for the removal of stains, discolouration and black marks.
Hull White contains an organic mixture of polymer gelling agents, oxalic acid, surfactant and glycol based solvent mixtures for the cleaning of fibreglass hulls.
Hull white can be used on any fibreglass surface which has become discoloured through age and weathering. It is effective at removing the brown/yellow staining on the waterlines of boats. As it is a gel, it stays where you apply it, even on vertical surfaces, meaning it can stay in contact with the surface for a longer period of time.