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Why Is There Adhesive Inside the Trunk Seal?

1 Answers

RachelDella

07/29/25 11:47pm

Automotive trunk seals, also known as liquid sealing adhesives, serve to create a seal between mating surfaces. Below is a classification of automotive sealing adhesive strips: 1. Vulcanized Rubber Sealing Strips: Typically made of EPDM (Ethylene Propylene Diene Monomer). These offer excellent comprehensive performance, outstanding ozone resistance, superior weather resistance, good high and low-temperature performance, remarkable chemical resistance, compatibility with various polar solvents, and low relative density. The drawback is significant expansion in general mineral oils and lubricating oils, and they are usually dark-colored products. Operating temperature range: -60°C to +150°C. Due to their wide applicability and excellent comprehensive performance, they are recognized by domestic and international industry enterprises. 2. Silicone Rubber Sealing Strips: Feature outstanding high and low-temperature resistance, ozone resistance, and weather resistance; excellent hydrophobicity and appropriate breathability; unparalleled insulation properties; meet food-grade hygiene requirements and can be produced in various colors. The downside is the poorest mechanical strength among rubber materials and poor oil resistance. Operating temperature range: -100°C to +300°C. Suitable for high-temperature, cold, and intense UV exposure regions, as well as mid-to-high-rise buildings. 3. Chloroprene Rubber (CR) Sealing Strips: Compared to other specialty rubbers, they may lag in certain individual properties but offer balanced overall performance. They provide excellent weather resistance, ozone resistance, heat aging resistance, oil and solvent resistance, good chemical resistance, and outstanding flame resistance, along with good adhesion. However, they have poor storage stability, may harden over time, and exhibit poor cold resistance.

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