This Fenwicks Advanced Caravan Over Wintering Exterior Protector is designed specifically for winter protection, providing a long-lasting coating that repels dirt, algae growth, and dark streaks, making spring cleaning easier. It can be applied after cleaning and is suitable for a wide range of surfaces including plastics, aluminium, glass, acrylic windows, GRP, ABS, fibreglass, decals, sealants, and paint. The product comes in a 1-litre size.