One of the primary functions of rubber strips in cars is to provide protection against the elements. They are designed to seal gaps between various car parts, preventing moisture, dust, dirt, and debris from entering the vehicle. This sealing capability is particularly vital for windows, doors, and sunroofs. By using rubber strips, manufacturers ensure that vehicles remain free from water leaks that can cause mold growth or rust in the body. Moreover, these strips act as insulators, keeping the interior climate controlled by reducing drafts and ensuring that air conditioning systems operate efficiently.