Xiamen Kingtom is a leading ChinaAutomobile fuel tank cap gasket and water seal gasket accessories manufacturers. Automotive Rubber Protective Cap's primary purpose is to maintain consistent air permeability in order to ensure air pressure balance. However, in order to safeguard client items, small cracks may emerge, allowing water, dust, oil, and other contaminants to be drawn into the products. To ensure humidity equilibrium, moisture vapor is released concurrently with water vapor vaporization.