Completely closed to traffic: to provide protection against moisture and salt ingress, the ceiling of the Gotthard tunnel was impregnated in late September with a specialty silane cream made by WACKER, the Munich-based chemical group.

A race against the clock: in late September, the ceiling of the Gotthard tunnel was impregnated with SILRES^® BS Creme C from WACKER. The treatment affords the tunnel lasting protection against moisture and salt.

Renovating the Gotthard tunnel: specialists used compressed air to apply the silane impregnating agent.