What to Do When the Car Seal Turns Black Upon Touch?
2 Answers
Car seal turning black upon touch requires replacement of the seal. Function of the Seal: Due to prolonged use, the door seal may harden and lose its soft elasticity, resulting in noise when the door is closed due to friction. In a -40 degrees Celsius low-temperature resistance test, the seal remains soft without hardening or becoming brittle, maintaining good adhesion and demonstrating excellent cold resistance. Even at 120 degrees Celsius, the seal retains its weather resistance, elasticity, and functionality without any impact. The choice of seal material ensures permanent softness and elasticity. Through formula adjustments, the softness of the dried sealant is enhanced, forming an effective sealing layer between the metal sheet and the seal. The unique high elasticity of butyl rubber ensures easy removal from the metal sheet without contamination. Replacement Steps: If the door seal has aged, replacing it is the best solution. You can have it replaced at the vehicle's 4S dealership or purchase the seal and specialized sealant to replace it yourself.
I noticed many car owners face the issue of blackened weatherstrips, and here's how I deal with it myself: First, rinse off surface dust with clean water, then gently wipe with a soft cloth dipped in neutral car wash soap or mild detergent, paying special attention to dirt in the crevices. If the results aren't satisfactory, I buy a dedicated rubber cleaner spray, let it sit for a few minutes, then lightly scrub stubborn stains with a toothbrush. After cleaning, be sure to rinse thoroughly and dry, then apply a layer of rubber protectant to prevent oxidation and dust buildup. This method not only restores the weatherstrip's shine but also extends its lifespan, preventing leaks or noise issues. Personally, I find regular maintenance crucial—like cleaning every two weeks—especially after rain or when parked in dusty environments where weatherstrips get dirty and blackened more easily. Neglecting this can accelerate aging, and replacing a new weatherstrip could cost hundreds, which isn't cost-effective.
