I use this from Southern Stain and Seal.
I’m not going to take on any more sealing jobs except under the circumstances where a customer demands it as a condition of doing the cleaning. There are a lot of factors to consider, the biggest being having to time the cleaning and sealing a few days apart when the weather is cooperative. The air temp, humidity, moisture and surface temp of the concrete all play a part in getting a quality job. Screw it up and your now into a re-do.
The SurfKoat is an oil based acrylic sealer that is applied with a 1 1/4 nap roller. I have used a pump sprayer on with a water-based brick sealer but never an acrylic.
It’s all based on square footage. Use your regular cleaning price for the cleaning. Figure out which product you are going to use and determine the coverage rate. Factor in supplies like rollers, laytex gloves, rags, trashbags, tarps, if necessary, cleaners like xylene, acetone, etc. and then labor and you get a price.