Foundation Armor AR350 is easy to use and works great at repelling water and bringing out the deeper color of your concrete. I used this product to seal my new colored concrete patio with a "sand" finish (for some reason, some light gray patches appeared during the curing process - Not efflorescence and I don't know why they appeared - I guess it just adds character to the patio finish). Even though AR30 says it is a satin finish, the actual sheen is more than I expected. We were hoping for a more matte finish - However, the gloss should tone down as time goes on though exposure to the elements. The odor is quite strong even though my application was in the wide open outdoors with a breeze. The sealer appears to create a tough and durable finish on the concrete - I hope it lasts for the 2-3 years stated on the can.