*PLUMBERSSTOCK EXPERT* responded:
Thank you for asking us at Plumbersstock.com about our Plumbers Epoxy Putty! Yes, it can be used on cast iron pipes as this epoxy putty is an all-purpose adhesive for many kinds of metals. To begin the ordering process, please click the Add to Cart button, enter your zipcode and your billing information, and we will take care of the rest. Happy shopping!