This 1 litre concentrated cleaner is formulated specifically for caravan exteriors and is safe for use on plastics, aluminium, acrylic windows, GRP, ABS, fibreglass, decals, and sealants. It uses a non-caustic, biodegradable formula that surrounds and lifts dirt rather than relying on aggressive chemicals. Typically diluted at around 2 capfuls per 5 litres of water, one bottle can clean up to approximately 40 caravans.