got two gallons to seal the red pavers and it worked very well. Even tho it was not suggested in the instructions I applied it with a brush as my pavers were quite rough and did not want to waste too much with the roll and product going in the gaps between the pavers. I covered approx 350 sq feet with the two gallons - one thick coat and looks great.
I does have a very strong odor - like fuel -. Even though it was applied outside and perfect ventilation the smell stayed in my nose for hours