Plug used to temporarily stop the flow from a leak in anything from a pipe to a tanker.
Football and Golfball Plugs
Polyurethane impregnated, water activated foam plug used to temporarily stop the flow from a leak in anything from a pipe, to a tanker, to a railcar... Even a boat! It is initially pliable to insert into a void and quickly expands and hardens to fill the void. It can even be applied below the water line.