i have used the por-15 tank sealing kit before but it was on an extremely 5 gallon honda generator tank. after sloshing a section of chain around in it to knock loose any rust scale the step i added was to remove any remaining rust through electrolysis (google search: rust removal, electrolysis).

i then followed the por-15 tank sealing instructions exactly, particularly the parts about everything being perfectly dry prior to sealing and to make sure any ports/openings in the tank did not get sealed shut.

according to the por-15 information their product is impervious to anything you might introduce into the tank. with the proper surface prep the sealer should remain bonded to the tank's interior.

if you have a bricks and mortar paint store nearby that stocks por-15 products you may want to purchase the metal prep and degreaser in the one gallon size. invariably the pints are just enough for the project but leave little for the next time.

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