Buy it you will love it - I dyed my outside concrete with water based dye and sealed with this. Amazing results as all seem to agree. Simple to use, cut the border with paint brush and rolled the rest with 3/8 nap roller. It dries fast and it is easy to over apply. I did one coat in a 12/ 10 area in 20 minutes.
Smell is very strong so I used painter mask and it helped. It looked great with one coat but did another a couple hours later to make sure it was all covered. Definately go as thin as you can with the coats and don't worry about the look until you let it dry , if you do it correctly you will be very happy. I also have cut flagstone on front of my house and the sun and salt air has completely faded the color. I tested an area and it also did a very good job of making these look "fresh". I had previously tried many others and this is the first that actually worked.
I have used so many waterbased sealers in past and they look OK but this is so much richer and enhanced the concrete color I applied a day earlier. I also called the customer service with a question and they are very helpful . Before and after photo, I did stain concrete prior to the sealer
