Great Product-Have PIAA silicon wipers on both cars. After washing car, treat the windshield AND the wiper blades to impregnate them as well. Wiper blades will weather slower and last longer-no squeak or chatter. Plus, silicon deposited on windshield allows water to flow off at speed without running wipers at a high rate. Use on rear deck glass as well. Great product. 20 year plus PIAA user. Will look at the PIAA for replacement Zenon/HD/LED bulbs as well (when the time comes).
I have the piaa wipers front and rear, and ever since I used the prep pads ....I prefer them over any other windshield treatment.