Can Soundproof Cotton Still Be Used After Getting Wet?

[Mitch]

Soundproof cotton that has gotten wet needs to be replaced promptly. The ingress of water into the soundproof cotton may be due to poor vehicle sealing. Check the following aspects: 1. Aging sealing strips: Whether the sealing strips are aged, cracked, or incomplete, leading to poor sealing and water ingress. 2. Damaged waterproof membrane: Check if the waterproof membrane inside the rear door trim panel is damaged. Recall whether any repairs or modifications were previously done that might have affected the waterproof membrane. 3. Clogged drainage holes: Check if the drainage holes on both sides of the sunroof are clogged. If clogged, rainwater cannot drain through the pipes, causing the water level to rise continuously. When the water level reaches a certain height, it will flow along the headliner to the sealing strips and eventually onto the floor soundproof cotton.