With Donnie on one side of the barrel, and Link on the other, they're able to shift it so that the gunpowder can't leak anymore. But if they need rags...

Giving Donnie a nod, Link leaves the barrel where it is and immediately begins a search. It doesn't take long for him to gather up what pieces of fabric he kind find in the debris - a torn sail here, a worn sack there. All of these, he thrusts towards Donnie while giving him a questioning look.

Will these work?