I've boiled water successfully before with the foil in my tin. It was folded and put in the tin and taken out after some time and the water boiling experiment done. There was some leakage from the edge but was still able to boil water with it. I thought the leakage was more dure to how I folded the cooking vessel rather than the foil springing leaks over the folded edges in the tin.
Then again, I was using HD alu foil and had a 3 ply cooking vessel to experiment with.
I doubt it would survive a refolding after boiling water....