Si guarda riporto un pezzo dal sito
www.applesnail.net
If however, a large amount of shell is absent or if there is a real treat for the snail to become eaten alive, once can choose to repair the holes by glueing pieces of snail shell, eggs shells or even pieces of plastic over them. The best glue for this is medical superglue, although common household superglue will do as well, but is toxic until it's dried. In such case (household glue) one needs to make absolutely sure that the glue does not come in contact with the snail tissues. Pits and detoriated surfaces can be repaired by covering them with strong nail polish (make sure to use water resistant polish), epoxy resin or even better super glue. The latter dries quickly and even hardens more when in contact with water. More info about shell repair can be found on Pam's website. She has carried out several experiments with shell repair and has a good practical guide available.
a quanto pare si, si può con la colla...