Don't use sealer on the rocker cover, f*cking annoying bodge job

Take the rocker cover off, clean both faces of the head and cam cover of any old sealer or gasket, buy a proper Cometic gasket and new Ford half moon seals. Only bit of sealer you should use is a blob on each corner of the half moon seals to keep in place as you fit the rocker cover.

Mine doesn't leak, so get it sorted