Additive for dry concrete and mortar and concrete made at the construction site. The anti-freezing agent ensures that the mass will cure in sub-zero temperatures without freezing. The curing of the product will continue down to -5 °C without heating so that CEM II A 42.5 R cement will achieve the freezing strength of 5 MPa in around 2 days. Compatible with all Portland cements. When mortar is used, the mortar must contain a sufficient amount of cement. The recommended volume is >20% of the dry weight.