06-01-2018, 02:15 AM
It may have been some sort of cement product, that was what was used in the ends of those ceramic tube type paper caps, maybe a masonry drill bit to break it up rather then a regular twist bit? How much of the can is filled with the stuff? Maybe you could cut the can with a pipe cutter further up and remove and replace the old caps that way?
Regards
Arran
Regards
Arran