GlossTec Car Wash - One Gallon Super Concentrate This 1 Gallon Glostec Super Concentrate mixes with water to make 1024 Oz(8 gallons) of ready to use product. Enough product to wash your car 90 to 100 times. (Number of washes varies from person to person and car to car) most washes take 10-12oz of product depending on size and level of soil on the car. Use to refill the GlossTec Pressure Sprayer. Reduces cost to about $0.40 per wash.