Ceramic Soap – SiO₂ Infused Hydrophobic Shampoo. Ceramic Soap is a highly hydrophobic, concentrated shampoo with a high content of SiO₂. Ideal for the care of cars protected with ceramic coatings, waxes, PPF foils and vinyl foils, on which it significantly enhances the gloss, gives a very strong hydrophobic effect and increases the slipperiness of the surface.