World's #1 Wart Freezing Brand! - Freezes Warts with a Single Treatment! Wartner has made cryotherapy available at home, and is proven to be as effective and safe as liquid nitrogen in the treatment of warts and verrucas. Wartner uses a mixture of dimethyl ether (DME) and propane, both of which are commonly used as propellants in products such as hair spray. This mixture freezes warts at a temperature of -57 C. Wartner works by freezing the core of the wart, which is caused by the contagious human papilloma virus (HPV). Freezing the wart causes it to fall off in 10 to 14 days, by which time healthy skin will have formed underneath. Wartner should only be used on common or plantar warts. Consult your doctor before use if you are diabetic, pregnant, or if the wart is located on a sensitive area (e.g. the face, neck, armpits).