Works by rapidly freezing the verruca or wart without the need for gels, creams or plasters Fast effective treatment Suitable for use on children over the age of 4 Carnation Cryospray Verruca and Wart Remover Freeze Spray 50ml is an easy to use treatment for the removal of verrucas and warts. It works by rapidly freezing the verruca or wart without the need for gels, creams or plasters - giving fast effective treatment. Removes with just 1 treatment, spray contains 12 applications.