A tunnel structure has to be waterproofed either with a drainage system, a waterstop system or with the active control system for highest safety comprising a double layer membrane and tested by vacuum.

Sikaplan® PVC and TPO sheet membrane systems are designed for long-term durability and ease of application to meet these needs. They include accessories and special solutions down to the most complex details.

Sikaplan sheet waterproofing system protecting Visp tunnel in Switzerland