Medical grade cyanoacrylate is a bit safer to use on wounds than Krazy Glue - less exothermic reaction, doesn't use cytotoxic solvents and the medical grade is apparently more bacteriostatic, but on the other hand the medical grade stuff costs your doctor about $80.00 for a single use vial (and he's going to double the price when he applies it to you, plus charge you $1,000 for the application), so for $4.00 for the Krazy Glue, it might just be worth it.