What Are the Special Requirements for Sealing Strips in Different Automotive Parts?

1. Door Frame Sealing Strip

Custom-processed with premium flocking technology, the flocking layer is dense, uniform,and highly adhesive. When in contact with the door panel, it significantly reduces friction resistance, ensuring smooth and effortless door opening/closing. It effectively eliminates noise caused by direct metal-rubber contact, enhancing the tactile experience for occupants and improving overall cabin quietness. Designed to fit various door frame structures, the strip offers excellent resilience and long-term durability, resisting deformation and detachment while providing both sealing and noise-reduction benefits.  

2. Engine Compartment Sealing Strip  

Engineered for the harsh conditions of high temperature and oil exposure in the engine bay, this strip is made from a special oil-resistant rubber formula. Its core performance meets industry-high standards—after 70 hours of immersion in IRM903 oil, the volume change rate is ≤15%, far exceeding the oil resistance limits of ordinary rubber seals. It effectively withstands erosion from engine oil, hydraulic fluid, and other greases, resisting swelling, hardening, or cracking even under prolonged exposure. This ensures a durable seal that prevents dust and rainwater intrusion, safeguarding the stable operation of the engine and compartment components.  

3. Sunroof Sealing Strip 

Built to withstand complex outdoor climates, this product emphasizes superior weather resistance, certified by passing 3,000 hours of QUV aging tests without cracking. It offers exceptional resistance to UV rays, extreme temperatures, rain, and wind erosion. Under harsh conditions such as intense sun, freezing cold, or heavy rain, the strip maintains consistent elasticity and sealing performance, effectively preventing water leakage, drafts, and other issues. Even with long-term outdoor exposure, it resists aging, brittleness, and shrinkage, providing reliable and lasting protection for sunroof systems. 

4. Battery Pack Sealing Strip 

Featuring a customized, irregular composite structure, this strip combines an inner layer of highly elastic EPDM rubber for excellent compression resilience and a tight fit into battery pack casing gaps, ensuring fundamental sealing. The outer layer is made of highly wear-resistant TPV material, offering outstanding scratch and aging resistance to withstand friction during installation and use. The dual-layer design works synergistically to achieve an IP67 or higher waterproof rating, effectively blocking moisture and dust from entering the battery pack. This ensures the safe and stable operation of battery modules, meeting the stringent sealing requirements of new energy vehicle power battery packs.