use oiled oakum with bonding putty to seal cast iron hub?
I just came back from HD. I tried to buy a 3" to 2" donut for my cast iron pipe replacement. They don't have it but i was recommended to use Oiled Oakum with Oatey's FIX-it STICK all purpose Bonding Putty to seal the hub joint. The procedure is the same as Oakum with Lead. Just use bonding Putty on the top instead of Lead.