Mike I used 2x2 inch by 60" long strips of HDPE from mcmaster carr. I did not try to glue it but just sat it down in the bilge
. The tank I coated with marine
and then painted with interlux
bilgekote. I believe it would have worked out ok as the weight of the tank with fuel
would have kept things down, but before I could finish the installation, the boat sank, the tank filled with sea water
and everything got messed up.
I plan on having a new tank built, and painting it with bilgekote. and using the same strips of HDPE to keep the bottom of the tank off the bilge
floor. My tank sits in bilge water
so its a big problem. I put in a small diaphram pump to try to keep the water level lower than the tank.
Far as I know this stuff can't be glued with any reliability
Hope this helps.