Fungal nail infections grow into and inside the nail, and are very difficult to reach and to treat. Excilor was specifically developed to treat fungal nail infections and is based on 3 principles: Superior and complete nail penetration: Excilor immediately reaches the fungi (dermatophytes). Instant healthy regrowth of the nail. Effective mode of action: Excilor changes the pH level inside the nail, creating a hostile environment for fungi to grow and further damage the nails. Convenience: Excilor is easy to apply, no need to file the nail. Product penetrates within seconds without leaving visible film. Ethyllactate, Aqua (water) 7%, Acetic Acid, Penetration Enhancer, Film-forming Agent, Preservatives (contains no Parabens)