I realized I didn't have enough wooden plugs for my usual practice of having a plug
in the vicinity of each through hull
in the event of failure. The local chandlery
was out, but showed me a couple of alternatives. One was a putty which allegedly expands on use and is designed for the application. Another was a soft plastic cone with gradations that can be pushed into any reasonable sized round hole and allegedly sticks. Another option was to stock a Nerf football (American) and stuff it into the hole.
I've always used the soft wooden plugs, but the conversation raised the general question. What (if anything) do you stock to plug
through hulls if they fail? Is there any reason to believe that any of the newer solutions are better/worse than the wooden plugs? The Nerf solution is certainly cost effective.