Gritt's Bike Wash True Bio is an extremely effective, environmentally friendly route to a sparklingly clean bike! It features a liquid-gel formula for vastly reduced run-off, deeper muck penetration and better cleaning with a cherry scent. It's totally safe on all surfaces and completely biodegradable - so you can wash your ride as much as you like without worry. Now in a concentrated form - one liter (1.06qt) yields 5 litres (1.3gal) of product. If a higher concentration is required, simply use less water.