Analysis of Automotive Wiring Harness Sealing and Waterproofing Technology
As the neural network of a vehicle’s electrical system, the automotive wiring harness requires reliable sealing at its connection points and penetration areas, which is critical to the overall electrical safety and service life of the vehicle. To meet the sealing and waterproofing needs of wiring harnesses, the key lies in selecting performance-matched waterproof Rubber or silicone sealing components, such as silicone plug seals for automotive harnesses. These sealing parts are typically made from silicone rubber or specially formulated EPDM (Ethylene Propylene Diene Monomer) rubber, offering excellent elastic recovery, wide temperature range adaptability, and strong resistance to aging. The sealing principle is based on a precisely engineered interference fit, achieving a balance between rubber hardness and sealing pressure. This ensures that when the plug and housing are tightly mated, sufficient radial pressure is generated to effectively block out moisture, dust, and chemical contaminants.
A particularly noteworthy application is the use of blind-end waterproof rubber tape for automotive wiring harnesses. This solution acts as a supplemental seal for harness ends or unused holes, forming a reliable barrier through wrapping or compression. It significantly enhances the waterproof rating and environmental adaptability of the harness system under complex operating conditions.
