[Regarding] a ball or a coil of reed-grass that were placed over the mouth of a barrel: If one plastered the sides, it has not protected [the uten- sil] until he plasters above them and below them, and the same is true for a woven cloth. [If the cover] was of papyrus or of leather and one tied it with a cord, [then] if one plastered the sides, it has protected [the utensil].