This is the product to use on Crystal Shield II coated shower doors. Just mist on and wipe off with a micro fiber cloth. Every time you use this product it rejuvenates the surface. This product works wonders on Glass, Porcelain, Tile, Fiberglass, Marble, Granite, and more. This is one of our NANO technology products. We ship Delta Repellent Wash and one of the micro fiber towels in the eShowerDoor Maintenance Kit for factory applied Crystal Shield II.