The Mechanical Joint gasket is designed to be used in cast iron mechanical joint fittings for cast iron size pipe (ductile iron and C-900 PVC). Mechanical Joint gaskets made of SBR are usually used for water and domestic sewage service. MJ gaskets made from SBR are used for air or liquid temperatures up to 150°F. For applications with temperatures above 150°F, or for other special service applications, consult the table below or call your Maloney Technical Products Customer Service Representative.