Hey, a lot of useful I could not find on the internet about sealing of terrace boards. So I opted for the product of MEM. I wanted to paint a car and what to do's the worst? So read the instructions supplied, recessions and product info's and held me to it. How to read everywhere, stains can have diverse causes, which does not necessarily have to lie on the product. So, the 45m² terrace cleaned and allow to dry really neat for several days. The processing by brush or roller was too mühsehlig and I opted for the spray gun as a processing unit. The compressor on 3.5 bar set, filled the spray gun and sprayed plate after plate in the cloister. It went faster than I thought and I spent driving on the surface less than 5 liters. The Garäte properly cleaned with water and well. The terrace had then to dry two days of rest. The result has satisfied me. The panels have a silky shine and the colors of the pebbles and granules are very good effect. The terrace has become a little darker and more vivid. Now it has rained today overnight and the rain runs off on the surface. That it appears from different angles, that the plates appear somewhat brighter at the edges, simply is that as flow also tend the plates to the so-called "bowls". Ie the center of the plate is simply lower than the peripheral edges. A 100% flat plate, it is hard to imagine. Conclusion: I am very happy and am curious to see how long I can enjoy it. Mfg. Lightworker