The unique feature of each PIAA Super Silicone blade is the silicone material in the blade that not only allows it to sweep more smoothly over the windshield surface, it also leaves an invisible coating of silicone on the windshield that causes water to bead up and not adhere to the surface even when the wipers aren't on.
The silicone film acts much like the rain-repelling treatments sold in automotive parts stores by causing water to form small beads on the windshield surface. Because the material is already in the PIAA Super Silicone blades, the inconvenience of having to periodically re-apply a treatment to the windshield is gone. A small amount of silicone is deposited on the windshield each time the blade sweeps across, and that continues for the life of the blade.
At lower speeds the silicone film makes water and snow easier for the blades to sweep from the surface, and at higher speeds the pressure of air flow accross the windshield means that the wiper blades can be run intermittently or at lower speeds than normally required to keep the windshield clear. Many times at highway speeds the beading action of the silicone film will mean is isn't necessary to even turn the windshield wipers on in rain or snow.
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