... seats, dormer, engine case, trunk. The main functions are waterproof, seal, soundproof, antifreeze, shock absorb, and save energy. Obvious features ... shape), hollow products, and metal rubber composite article. 3. Seal features: weather strip, sealing. 4. Rubber composite structure: ... light-colored) and foam sponge rubber; Four composite seal--- a thin protective rubber covered the foam sponge rubber ...