Keratolysis is the removal of dead surface skin cells and is a treatment for several types of wart.
The most common keratolytic treatment of warts available over-the-counter involves salicylic acid.
Removing a wart with this method requires a strict regimen of cleaning the area, applying the salicylic acid, and removing the dead skin with a pumice stone or emery board.
[1] Brands in the UK include Bazuka (Dendron), Scholl (SSL International), Compound W, Cuplex gel, Duofilm (Stiefel), Occlusal (Alliance), Salatac Gel, Salactol Paint, and Verrugon (Ransom).
[1][2][additional citation(s) needed] Some cases of allergic contact dermatitis have been observed when using collodion formulations.