I have a extra 5 gallon container I did not use on a concrete job. It is completely full 5 gallons and never used. I just bought a few days ago. Its been in the shade in my house. To buy this at a specialty a contractor store like White Cap it costs $285 new. I can't return it so, I will sell for half price $140. This is a very good deal. If you are pouring concrete this is applied with a pump sprayer just after you finish the concrete. Then wash off topcast for a perfect acid washed look. It's what all the pros use. Contact me if interested in picking this up. Thanks