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Self-Healing Concrete

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Increasing the watertightness, durability & sustainability and reducing the maintenance of concrete

Page last modified
March 14 2023

Basilisk Self-Healing Concrete is developed at the Delft University of Technology and is based on a autonomous repair system which is made possible by limestone-producing micro-organisms (bacteria). When the bacteria come in contact with oxygen and water, they are capable of converting certain nutrients to calcium carbonate (limestone). Due to the formation of limestone, cracks are autonomously repaired, increasing the durability and watertightness of the concrete structure.


Concrete with Basilisk Healing Agent can repair its own cracks without any human interaction
Concrete structures executed with Basilisk Healing Agent require less maintenance - therefore, it’s specifically suitable for structures where crack formation adds up to the maintenance requirements
Adding Self-Healing properties to concrete increases its quality and durability performance, resulting in lower Life Cycle Costs
Self-Healing Concrete seals its own cracks, making special coatings or waterproofing membranes redundant
Because of it Self-Healing capabilities, larger crack-widths can be accepted in the design, limiting the required amount of shrinkage rebar
Self-Healing Concrete seals cracks up to 1 mm crack-width (depends on dosage)
Use Basilisk Self-Healing Agent to solve the common crack-control issues in recycled concrete
Self-Healing Concrete with longer service life, without membranes, with less reinforcement or executed as recycled concrete will reduce concrete’s CO₂ footprint significantly
By adding the Self-Healing Agent to the concrete mix, you are adding some costs as well. Fortunately, thanks to its added value its easy to end up with a business case


Maintenance Self-Healing Concrete repairs its own cracks, reducing maintenance costs.
Asset Management This technology offers longer service life of your concrete structures.
Coatings With the Self-Healing Agent, concrete can be executed watertight from the concrete plant, without the need of special coatings.
Watertightness Concrete that is able to seal its own cracks and pores can be frequently executed as watertight concrete directly from the concrete plant without the need of special coatings and/ or membranes.
Low Carbon Concrete Self-Healing Concrete makes it possible to reduce a huge amount of shrinkage reinforcement and balances the lack of autogenous healing properties when replacing up to 60% percent of Portland cement.

Relative Business Impact

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Technology Readiness Level


Development Technology demonstration Mature / Proven
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About Basilisk Concrete

Basilisk has a number of unique products that enable Self-Healing Concrete. 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. The autonomous repair system is implemented in several products that are applicable for both new constructions and existing structures. Currently cracks up to 1 mm can be repaired, but the development goes on.

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