Product features The windshield washer fluid cover is made from special materials to ensure the washer fluid does not leak or get affected by the external environment. In addition, we have reinforced and improved the cover to be more wear resistant and shatterproof. Product material Our windshield washer system reservoir cap is made from a special material, making the product lightweight, easy to use, and weatherproof, so worn parts can be replaced to prevent any leakage. Product installation Remove the old cap and install the new cap. Recheck that the cap seals with the gasket. Function Our car radiator cap can, under normal conditions, maintain airtightness and effectively prevent coolant leaks. Use scenarios - Replace worn or damaged caps during routine maintenance to prevent washer fluid leakage. - Suitable for vehicles in extreme weather or outdoor environments where a weatherproof seal is important. - Use as a radiator cap replacement to preserve airtightness and prevent coolant leaks during cooling system maintenance.