Rich suggested and wipe it with silicon to saturate it on both sides. Let dry and then install it. It wouldn't increase the thickness but still give it some body to help it stay together. You might even try painting it with super glue and then trimming it to size. Like you mentioned earlier, they are very thin and almost like wax paper. Those seals have a very small tolerance and don't take much abuse. I would find something sooner then later. Good luck.