What is the sealant inside car doors called?
2 Answers
It is butyl rubber, characterized by softness and non-drying adhesion, primarily used for door waterproof membranes. The latest type of door waterproof membrane adhesive, the environmentally friendly water-based S1555 waterproof adhesive, offers better performance, cost-effectiveness, environmental friendliness, aesthetic appeal, and higher production efficiency. Its main functions are to work in conjunction with dustproof membranes to prevent dust, water, and noise. The composition is derived from petroleum by-products. Here is additional information: The role of sealant: Generally, the sealing here does not require a thick application of adhesive. It can be used in conjunction with solid gaskets or applied directly to the sealing surface for sealing purposes. In some cases, such as seam sealing or gap filling, a larger amount of adhesive may be required.
I often tinker with my car myself. The sealant inside the door is commonly called the window seal strip, which is mainly made of rubber and attached to the inner side of the door to prevent water leakage. Once during a long-distance drive in heavy rain, I noticed water seeping into the car, and upon inspection, it turned out this seal strip had aged and cracked. During regular maintenance, it's advisable to periodically check for gaps that might let light through or feel unusual, especially in older cars where this seal tends to harden and peel off. If it's damaged, you'll need to replace it—it's a simple DIY job: clean the surface, align and stick it on. The material isn't expensive, but once installed properly, it ensures good sealing to prevent rust or short circuits in electronic components. If left unrepaired for a long time, rainwater leakage can soak the floor mats and even corrode the door structure, compromising safety. Mechanics often say this small part plays a big role, so don't overlook its routine maintenance.
