Wartner® is an over-the-counter wart removal device that uses cryotherapy, the method of wart removal traditionally used by physicians. 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 (-70° F). In comparison, liquid nitrogen, used by physicians, is effective at a temperature of -196° C
(-320.8° F). Wartner® works by freezing the core of the wart, which is caused by the contagious human papilloma virus (HPV).
Wartner® is easy and safe to use because of its application system. The patented "key" fits only one way in the top of the canister, eliminating any chance that the mixture
will be released unintentionally. The DME and propane mixture is released into a foam applicator attached to the key. This foam applicator is then held on the wart for a
single 10 to 40 seconds application.