Easy to use and full instructions provided which I followed to the letter. I was lucky in that it stopped raining for the time required to apply the product on the stone carving, but at night I covered it lightly with a large plastic bag which in the end was not needed as the rain held off. I used a small brush to apply it as the carving has many nooks and crannies on all four sides, and made sure to remove the surplus as instructed. I'm confident that it has worked well as the carving sits in my Zen garden in all weathers. Would recommend highly.