I use Zap from Rainbow Connection which I have no problems with and the smell isn't too bad (unlike others I tried).
https://rainbow-connection.co.uk/products/zap-liquid-latex-based-nail-art-skin-protector
I have also tried peel off protectors:
http://www.ebay.co.uk/itm/1-Sheet-N...hash=item43fb0de037:m:m3aUZ-epOtLs60v6CItJTWw
Pros for liquid - more cost effective.
Cons - can be messy. I have ended up with liquid latex in my hair and dropped some on the cat.....not good.
Pros for nail shields. Not tacky so stays in place until you peel off.
Cons - work out more expensive.