> Plastic boats frequently have foam bulkheads glued in. But it's hard for
> even the manufacturers to keep those joints watertight over time. The
> plastic is hard to glue to and it flexes a lot. Still, a foam bulkhead is
> better than no bulkhead at all.

I know everyone has heard this before, but you would have excellent results glueing bulkheads into plastic boats using urethane adhesives. Very fast, very simple and very very strong.

They are a little more expensive, but well worth it.

Ian