Following the instructions, I purchased two nylon, solvent-resistant brushes at Menard's and began to apply the seal with a 2" angle brush starting in the corner nearest my front door. The SuperSeal 25 applies very easily with a brush. It is a clear liquid with the consistency of an unbeaten egg white. I would recommend having a small cloth rag in your pocket to wipe off the rare droplets that may splash on your siding. I also used a 14" square of cardboard to place the gallon of SuperSeal 25 on and moved that around as I applied the seal. I found it best to be patient as you apply the seal to a stamped concrete resembling natural slate stone which I have in my home. It requires you to use brush strokes in different directions to apply the seal evenly. Also the liquid seal will accumulate inside the horizontal and vertical cut marks made in the concrete so you'll systematically need to use your brush to move that liquid seal out from the cut marks onto the concrete surface. It really helps to be wearing those heavy duty knee pads while applying the seal.
The seal does have a chemical solvent smell so I didn't try to linger with my face over the open gallon container. That said, you will be fine if applying the sealer outside with a normal breeze.
I found the SuperSeal 25 easy to apply and ended up using approximately 1/3 of a gallon to finish my ~60 sq. feet of porch entry stamped concrete.
The final result is shown in my attached photos. I have included one "before picture" showing the Gull Gray stamped concrete near some potted plants and then what the porch concrete looks like after the SuperSeal 25 has been applied and allowed to dry for 24 hours. The finished, sealed concrete surface looks very wet (in my opinion) and beautifully brings out even the smallest details of the stamped slate rock in the concrete. It's an amazing look and I am extremely happy with the SuperSeal 25 Semi-Gloss product. The Semi-Gloss finished with an extremely "wet look" in my opinion so I can't imagine using a Full Gloss sealer...but, to each his own.
I'm extremely satisfied with the SuperSeal 25 Semi-Gloss stamped concrete seal product and give it my strongest recommendation. I hope my story and photos help you with your concrete sealing project. Eric