Is there any special sealers that I can use to attach fuel filler line to filler cap,both on inside and outside.I can not use clamps to seal inside because there is no room to tighten them,on the outside I was going to use 5200 to hold every thing in place because I can not get a fastener on the back of the hold down screws.Will the 5200 be strong enough to hold everything in place?Thanks for the help!!