The Dual Seal Waterproof S Series Toggle is designed as a panel seal switch and is not to be used in under water applications. It has been tested to meet IP68 ratings of IEC-60529 standards which include dust tight and protection against effects of temporary immersion. The switch provides double protection with a waterproof boot constructed of silicone rubber and an internal O-ring constructed of nitrile butadiene rubber. Each of the materials have different resistance tolerance to environmental effects.