Everbuild filler coat everbuild fillcoat5 filler coat is a thick base coat for use on imperfect surfaces prior to painting it hides and obliterates areas that have been filled as well as covering and preventing the reapperance of hairline cracks working like a roll on filler the thick formula completely covers strong colours and is ideal for use on walls and ceilings everbuild fillcoat5 filler coat 5 litre