Re: where is the foam?
You can put the foam anywhere you like. Yes, you can use an expanding foam in a can, just make sure you use the one in the blue can. There are two kinds, one is a red can, the other is blue. The blue is ment for outdoor use, and is water proof. And remember, if you use the expanding foam, set up the area so you can have the water flow to the back of the boat, and out the drain hole.