Oatey 30614 No. 2 Pipe Seal, 16-Ounce Caulking lead substitute for sealing cast iron soil pipe joints. Air dry putty compound packs easily and resists shrinkage. Forms a hard leakproof seal. For use whenever it is impractical to pour molten lead. Non-toxic, soft, paste like material for lubricating bell joint pipe gaskets Will not deteriorate natural or synthetic rubber Will not support bacteria Dissolves in hot water