I think that it would cover several square feet with an 1/8th inch thickness.
It worked well but it does seem like you have to use several coats to make it thick enough.
Great idea and great for small projects, but you have to use a lot and it takes a lot of time, since you have to wait for it dry completely between coats.
The only reason I give 4 stars is cuz for a big job I needed 7 12oz cans and there is no larger quantity or case lot or brush on version available.
The aluminum color matchs the color of cement, which I used it on, so you don't need to paint it if used on cement.Bad: You have to use a lot of it and use several coatings.
Did not solve my problem.
It's just ok.
The spray can was difficult to control, it comes out clumpy, not a fine mist like reqular spray paint.
The leak seal liquid seals and sticks well.
As all sealers dosen't work unless it is a small opening to thin.