Getting ready to go a weeks camping and my o0ld 1977 "Dreamer" MH has a leak in the hose from the filler cap to the steel neck as the tank. it's right at the connection where the rubber meets the tank neck, the clamp I believe has cut it a tad. Can I use a liquid steel/alum/etc to paint that for a ONE TIME trip sealant so I can fill the tank to top ??? suggestions please, I don't have time to replace it now.