[If] one coats a sound earthenware utensil, R’ Meir and R’ Shimon rule [the coating] tamei, but the Sages say: [If] one coats a sound [utensil, then the coating] is tahor, but [if one coats] a fractured [utensil, the coating] is tamei. And the same applies to the reinforcement of a gourd-shell.

The yablis used to coat pithoi: That which touches it is tamei. The stopper of a barrel is not [regarded as] connected. That which touches the coating of an oven is tamei.