yea thanks for the replies gentleman, i already tried a simular solution with simular stuff called quick steel we use at work. Due to fuel leaking out it didn't want to bond to the metal tank, i eventually got it to, but the fuel lifted it up and kept leaking through it. However, that was with a full tank, i might drain the whole tank dry so it doesn't leak out stopping the need it from lifting up and start again. Thanks again for your replies.