dsoucy1, Check out this thread on the Hi-lo forum http://www.hilotrailerforum.com/f19/towing-mirrors-toyota-tacoma-1376/ if you want to see the photos you will need to join.
Koolseal Koolseal 63-600-5 gallon bucket check hardware stores for a better price I used it to fill in pinholes on my 96 hi-lo last year. Has not leaked since. 19x8 foot roof took 2 gallons.