Sealing The car water tank cover fits tightly on the water tank opening, preventing leaks and helping the tank store water more effectively. This tight seal supports stable coolant levels and can contribute to better engine cooling performance. Stability Made of durable plastic material, it resists rust from contact with water in the tank. It is designed for long service life, provides reliable stability, and is not easy to crack. Convenience Easy to install with no tools required. The outer surface features a non-slip texture to improve grip for simple installation and removal. Key attributes Function: seals tightly to prevent leaks, supports stable coolant storage, and helps maintain engine cooling performance. Compatibility: designed to fit tightly on the opening of the water tank cover. Material: plastic, corrosion- and rust-resistant. Performance: durable, stable, and resistant to cracking under normal use. Installation: tool-free, with a non-slip grip to aid handling. Use scenarios - Routine maintenance: while topping up coolant or inspecting the engine bay, the secure seal prevents spills and ensures a reliable fit. - Long trips or storage: keeps the coolant contained and minimizes evaporation, supporting consistent engine temperature. - DIY or service work: quick and tool-free installation makes it suitable for at-home or workshop use.