Abstract: A therapeutic method of treating the chronic human superficial fungus infection tinea pedis produced by the pathogenic dermatophytic fungi Microsporum sp., Trichophyton sp., and Epidermophyton sp., which invade and attack keratinized skin areas of the body by repeatedly applying topically to the itching, macerated, cracked, and scaling skin areas of the body at the site of the infection a fungicidally effective amount of a silane-containing lotion antagonistic to the dermatophytic fungi in order to exert at least an inhibitory growth effect upon the dermatophytes.