Re: Gluvit or Steelflux???
I have used both-- I like steel flex better. they make a regular one, one that resists chemicals like gas and a super slick one for bottom of air boats and any other boat.
i have used steel flex on my 1966 chrysler polara--entire hull inside--
really works great---can be ordered through FLORIDA GLUE PRODUCTS IN WEST PALM BEACH.
ALL the air boat builders use it around here and everglades.
good luck
ri rory