The product works very well. Gas tank turned out great. This stuff seals anything it touches. It will adhere to any surface wet or dry! Use latex gloves and be careful what you get it on. What ever you do, DO NOT drain sealer back into can and put lid back on!!! I put the lid back on half heartedly and it was sitting on work bench next to my tank. As I was wiping my tank down, the lid blew off and covered me the tank and some got on my new truck. It took over a week for all the sealer to come off my skin and it ruined the clothes I had on. I got it off the truck in time as far as I can tell, but the tank did not do as well. Hopefully it can be buffed out. Be CAREFUL or you will cause yourself a lot of unnecessary grief.