awning repair

Here's the deal, we have an awning that is in really good shape with the exception of one issue. Across the top it looks like it could have cracked or whatever but the 2 layers is getting water between them. It is only a little bit but it creates a puddle between the two. Do they make something that I can spray across the top ( such as tent sealer ) that might work with my awning? I really hate to replace it as 99% of it is in really good shape, just the issue of getting a small amount of water between the plys.