It heals like a wound in the finger. The technology is based on micro-organisms that produce limestone, as a result crack formation in concrete structures can be autonomously repaired. This way the durability of the concrete structure is greatly improved. Currently cracks up to 0.8 mm can be repaired, but the development goes on.
The technology was developed and patented in collaboration with the Delft University of Technology. After successful testing the interest from the (concrete) market grew strongly.