Had 1/2 of bottle left over from probably 2009 maybe earlier or later so decided to use it. Took a bit of shaking it up first but seemed okay. Took 3-4 hours with everything.. feels like my arm's going to fall off! Think it came out ok. Going to wash it in a couple weeks after our trip to remove any of the left over haze, not too worried about. One thing for sure not going to complain if and when I do the cars! Complimentary shot.. yes the PO got a bit over zealous with the caulking gun.