Rob has a Seaskin front loading membrane suit with (I think) a BDM metal zip. In a fit of enthusiasm, he cleaned the zip really well to the point that he removed the plug of waterproofing stuff at the bottom end and water poured in on his next dive. He bought some stuff which was recommended for Seaskin suits, but it turned out to be silicon grease for the plastic zip, so not nearly robust enough and the zip started to leak again. Does anyone know what is supposed to be in there? He said it was more like a stiff paste.