I started my first Pro-Seal work with the six L Tank Stiffeners. Surfaces to be sealed had to be roughed up and very clean to insure proper adhesion. I used a small digital scale to get a 10:1 ratio of the Pro-Seal Base and the Accelerator. The stuff is thick, gooey sticky and stinky. Taking care and wearing gloves I had no real problems applying the goop and the results look good. More practice handling and applying the stuff is in order.