I.remembered.the.name.on.the.little.'60-ish.yellow.cans! Iron.Cement.No.1.by.The.Smooth-On.Mfg.Co. The.iron.filings.expanded.as.it.set.which.made.it.great.for.setting.bolts.and. for.repairing.holes.in.boilers.etc. Thanks.for.listening. John.Mascaro