filling a small gap

[xort]

There is a small gap, about a 1/4", between two stringers in my bilge. If I were to get some water there it would be very hard to get it out.
I'm thinking of pouring epoxy in there. I know there are no wires or limber holes to worry about.
What sort of epoxy or other stuff would flow easily into this gap to fill it and seal it permanently?

[Idiens]

West System epoxy would work, first paint in some of the straight mix to wet the area and then add filler to the mix and squeeze in. It stays runny for a long time before hardening and can creep into lots of corners. The filler will increase strength and reduce the amount of epoxy you need.

[xort]

Can't paint in, too narrow & deep.

[hellosailor]

xort, some of the "gitrot" type pentrating epoxies would be perfect for that. They're designed to be thin and suck into cracks, and into the wood itself. They won't add the strength of conventional epoxies--but they'll do a better job of creeping in and sealing what you've got. I'd start with a smallish pour, just in case that crack is open on the bottom and they can run away through it.

You're not going to be plugging the only air space that lets those stringers breath and dry out, are you?

[xort]

Fiberglass encapsulated, so no wood to seal or penetrate.

[hellosailor]

Probably will still fill, bond, and seal the way you want it to. I'm sure the various makers could tell you for certain.