Be careful with the Sherwin Williams product. I used it once with great results but my dad used it in his motorhome garage with abysmal results. Sherwin Williams ended up giving him new material and it still is not good. he followed all the directions for prep and application but it still had problems. For example, when you drive in with hot tires, the tires will stick and cause the coating to come up in that area.
If you want a great product that is very cost effective, there is a product from Shepplers that goes on with a garden sprayer and then back rolled. It is a clear coat and leaves the floor the natural concrete color but with a wet look. I used it on my 3,000 sf shop and it has held up wonderfully. It is impervious to most solvents, is easy to apply yourself, and is relatively cheap. I bought a 5 gallon container and used maybe 4 gallons for the whole shop. I believe, at the time, 5 gallons was less than $100. It has been down for 8 years and still looks great. It seals the concrete and makes clean up much better.
I now recommend it to my custom home customers for use on their garage floors. I can't remember the name right off the top of my head but if you are interested, send me a PM and I will get the info for you. it is made for sealing concrete, especially stamped and dyed concrete like sidewalks. I have used it in commercial applications as well with great results.
