At the moment, another seal in this case coming from Bonn, has been on the market for a relatively long time, (instead of?) In 1978, the Blue Angel, if you pay attention, it can now also be found on an increasing number of construction products. When tests carried out by independent testing institutes, a quality is ultimately sealed.

There are materials that you might not even expect at first glance. I've pulled out an example here with the Blue Angel award. The interesting thing about this thin concrete mat is that it is a cementitious material. The surface has a concrete appearance, looks the same and has achieved the Blue Angel certificate just because of the biopolyurethane used in the backing material, as you can see on the back.

It is therefore awarded the Blue Angel.