I really liked the sealer. It's easy to use and has a nice, slightly damp look that adds depth to the color and makes the whole decking look bright. I've used this about every two or three years to seal the stone after thorough cleaning. Sandstone does not wash well with water as it is a softer stone. A seal protects it from absorbing mold and dirt. Cleaning is much easier. There are no pungent odors and no awkward cleaning of brushes and tools used for application. I strongly recommend this product. *****