I have a pergola that I covered with Tuftex Translucent Smoke Corrugated Plastic Roof Panels.

Corrugated Plastic Roof Panels.

http://www.lowes.com/pd_73146-1115-1419C_0__?productId=3043440

My problem is that when I installed it, I made the mistake of not sealing the overlapping seams with silicone. I overlapped 2 waves and I thought that was enough. Well its not. I cant get to the top because its not strong enough to support anyone, but I can get to the underside. I was going to put silicone in the underside seams. But I was thinking there are some silicone spray products that I could coat the seams with. As long as its clear it might not look too bad. Maybe a combo of both? Here are some products I found.

Silicone Rescue Tape

Rescue 911 Clear - Instant Gutter, Roof, Concrete & PVC Sealer

The leak is in about 5 or 6 spots, I really wish I sealed it when I first put it up. But any ideas to help save this roof would be appreciated. I dont need for it to be 100% its the roof of an open pergola. Here are some pics

http://alexj212.imgur.com/pergola

Thanks

Here is a link that might be useful: Pictures of pergola