Stay true to form!

Better stability with our shrinkage reducing agents

Shrinkage is the term used to describe a reduction in volume of cement-based products due to a change in the water balance.

In addition to ambient weather conditions and internal dehydration, chemical/mineral reactions also play an important role. This volume reduction can affect both the shape of the concrete element as well as its bearing points. Restriction of the free shrinkage results in the build-up of internal forces and tensions, which can lead to deformation and crack formation.

Evonik recognizes that sustainability is of utmost importance for all our futures. As a result, our product development focuses on high-performance products that are friendly to the environment.

Evonik has developed a new generation of SITREN® shrinkage reducing agents. Thanks to their extremely low VOC content, SITREN® shrinkage reducing agents are able to meet the most stringent eco label requirements such as EMICODE EC1PLUS – without any dosage restrictions.

Minimize shrinkage – increase durability

Both technical and aesthetic demands for building materials are higher than ever before. Lack of shrinkage control has a strong impact on the use and durability of concrete materials.

Our SITREN® shrinkage reducing agents, developed in close cooperation with the admixture industry, stand out for both ecological and technical reasons. The reduction in the capillary pressure and the stress in the pore structure, results in markedly reduced shrinkage and thus in the prevention of crack formation. The cement setting and the concrete early strength are not affected. In combination with an optimized water content, our new generation of shrinkage reducing agents also ensure improved durability.


  • In-situ und ready-mixed concrete
  • Prefabricated concrete
  • Concrete products (e. g. paving stones and concrete blocks)
  • Concrete screeds
  • Special concrete (e. g. HPC and UHPC)
  • Architectural concrete
  • Reinforced concrete
  • Self-compacting concrete