I had moisture coming in my chimney during heavy rains. This product shipped quick and was easy to use with my weed sprayer. I did patch a couple mortar cracks first before using D30. They said if cracks are hairline cracks don't patch but mine were larger so used a hydraulic cement first. No more water issues. Thank You!

We had dampness inside our garage wall...just in the one corner. Sprayed one coat of this Deco 30 on the exterior stone. Works great no problems since late Oct.