It was expensive, especially considering the roof was more than enough. But I didn't know that beforehand and I couldn't find it locally so I got it. It was very good. There were two packages in my roof box and one of them leaked during transport. There was no way this one would leak unless you poke a hole in it. I had a heck of a lot of time to open it. I couldn't make it thick enough either. I'm not sure what would be the best way to apply this.