SITRENR® PSR 105 is a powdered shrinkage reducing additive. The active components are organic alcohols on an inorganic carrier. By reducing capillary tension of pore water, a primary cause for drying shrinkage. It reduces the drying shrinkage in a wide variety of different binder systems. Main applications such as self levelling underlayment (SLU), flow able screeds, non-shrink grouts, repair mortars and powder paints.