Fleetwash may be left to dry on any surface being washed, and it will rinse freely away carrying with it dirt, oil and grime deposits without streaking. It will not promote rust as the solution contains an active rust inhibitor. The solution has an unlimited shelf life in an unopened container, and is biodegradable, beginning to breakdown after dilution. The more diluted the product, the less effective it will be. Prolonged use will not have an adverse effect on rubber, paint, vinyl or fabric. It also works effectively with either hand sprays or pressure washers. DIRECTIONS FOR USE - Manual Washing – Dilute with up to 10 parts of clean water, sponge on, allow 3-5 minutes, and then rinse clean with water. - Low Pressure Spraying - Dilute with up to 10 parts of clean water, spray on, allow 3-5 minutes, and then rinse clean with water. - High Pressure Spraying – Dilute with up to 15 parts of clean water (up to 20 parts water can also be successful), spray or foam onto surface, allow 3-5 minutes, then pressure rinse with clean water.