I just did my bow end pour using foam as a filler and the heat of the epoxy cure melted the foam! The resulting mess still filled but only about 1/2 the area I had planned on.
: I did the dam/end pour technique using foam particles as the filler. Does not
: require a sophisticated dam if the epoxy foam mixture is thick enough. Has
: worked fine on both kayaks I tried it on. Plenty strong and not too heavy.
: Earl