The Boat Cleaner offers 940 sprays, enough for a 45-foot boat. Here are the instructions for use: apply to the surface you want to clean, let the product act for 0.3 to 1 minute, then rinse with clean water to prevent it from drying. Finally, rinse the area you treated with shampoo and a sponge. It is recommended to wear gloves to avoid irritation and to be careful where drips occur to prevent stains. It can also be combined with Dw boat shampoo or the professional Dc02 series for cleaning more stubborn stains.