Here I am starting to pour foam, I used 2 part 2lb foam in these areas.
I use a paint mixer the kind that goes in a drill to mix the foam. The area you can see is approx. 3 1/2 x 1 1/2x 1 1/2 of area. I used about 1/2 gallon each of part a and part b to fill this spot. I will be filling the rest of it after the lid is on because I want it to expand and bond with the lid. I will need to bore holes in the lid to do so, and will be using a 2" hole saw for this purpose, so I have a plug already made to put in the hole as the foam expands. Also I mixed the foam right ion the boat due to the fact I had only 30 seconds or so before it started to expand. Note the 2x2 thats not been treated to resin yet. Sticks out like a sore thumb.