Gtechniq G Wash High Foaming Maintenance Shampoo - (1000ml) Gtechniq G Wash is a specially formulated shampoo designed to clean your vehicle, without damaging or stripping away your Gtechniq Coatings. G Wash will break the bond of dirt and other contamination from the surface, while lubricating these dirt particles. This minimizes surface abrasion, allowing you to glide your wash mitt over your car without the fear of implementing new imperfections during the wash process. All it takes is 2 caps per bucket for light cleanings and 4 caps for cars that are more heavily soiled.