Acrytensil
I had a split thumbnail, which wouldn’t grow out, for over a year and could find no cure. Then a chiropodist recommended trying Acrytensil. I bought a bottle and after treating my nail over a period of months it is now as good as new. This is a spare bottle with solvent as it does evaporate but split nails are such a nuisance, catching on everything, that it’s nice to have some in the cupboard in case of emergency. Great product.