I use it to repair heavvy duty high voltage electrocables which are being dragged through puddles of water all the time. It won't fall of, nor will it wear off easily. I've even used it when my rigboots were pierced by a sharp piece of steel to make them waterproof again. It lasted untill the boots were worn out and i had to throw them away. And we're talking about sea water here, acids, etc.
And there's always anesthetics as a last resort.
