Flex seal is something that they advertise on TV that you spray to stop leaks like on gutters etc. they show a man in a boat where he put a screen in the bottom of a boat and sprayed flex seal on it and it didn't let any water in and he was floating away.... Well now it comes in clear and white and black and green. I'm not sure about any other colors. You can get it at Walmart. I am really excited to and I will be sure to post pictures when I get them planted and fixed just right.