Mortar additive Tard®-900 P

retarder

SikaTard®-900 P is a high-performance set retarder in powder form for cement and cement-gypsum based binder systems. Very efficient retardation at low dosage Works with all cement types Positive effect on consistency Usage SikaTard®-900 P provides excellent performance in the adjustment of setting time and workability cement-gypsum based dry mortars. The product is especially suitable for the following applications: In cementitious self-levelling screeds In ternary, OPC-rich self-levelling underlayments In with cement stimulated anhydrite flow screeds As additional retarder component to adjust application time in gypsum plaster and lime-gypsum-plaster Advantages SikaTard®-900 P offers the following advantages: Very effective on CEM I-cements with high sulphate resistance (HS) Very effective on slag cements (CEM III) Influence on the formation of ettringite in fresh mortar Very efficient retardation at low dosage High robustness in a wide dosage range Extension of processing time up to several hours, depending on dosage Compatible with other additives, such as Sika® ViscoCrete® superplasticizers No reduction in the final strength (unlike with several fruit acid based retarders) Packaging 25 kg bag / 900 kg per pallet Colour White granules Composition Phosphonate mix Shelf life 36 months shelf life from date of production if stored properly in undamaged, unopened, original sealed packaging. Storage conditions Dry storage and protected from direct sunlight. Bulk density approx. 900 kg/m3 pH-Value approx. 11 at +23 °C (50 % solution) Total chloride ion content ≤ 22 %