I've found the Bill Hirsch slosh sealer to be effective and long lasting. I sloshed the glass tanks on my KR with it 18 1/2 years ago. After 18 years of use and over 1000 hours of flight time, I have observed no issues with the slosh sealer, nor have the small weeps I had in the glass ever come back. I've got a gallon of this stuff in my hangar to use on the glass tanks in my SuperCub sometime this winter.
-Jeff Scott Los Alamos, NM > > I would like to seal my fiberglass fuel tank.? > > I am looking at the Bill Hirsch gas tank sealer from Aircraft Spruce. > > What experience have you had, what has worked? > > Thank you, > > Joe
