Retardan®-2025 P
Retardan®-2025 P is a high-performance set retarder in powder form for calcium sulphate (Gypsum) based binder systems.
- No reduction in the final strength
- Compatible with other additives
- Ecologically safe and EC1 plus suitable
Usage
Retardan®-2025 P provides excellent performance in the adjustment of setting time and workability of calcium sulphate binders, especially in neutral to slightly alkaline α- and β- Hemihydrate binders.The product is especially suitable for the following applications
- Production of self-levelling screeds and underlayments
- Production of moulding and modelling plaster
Advantages
Retardan®-2025 P offers the following advantages:- Very effective set retarder for a variety of calcium sulphate binder types
- Allows adjustment of the setting-time to the needs of the manufacturing process
- Increased workability time for calcium sulfate based plasters and mortars up to several hours, depending on the dosage
- Compatible with with other additives, such as Sika® ViscoCrete® superplasticizers
- Retardan®-2025 P allows the preparation of large volume mixes and thus reduces the overall costs of the application
- No reduction in the final strength of gypsum based products (unlike with several fruit acid based retarders)
- Uniform quality ensures a stable manufacturing process as well as uniformity and homogeneity of the final gypsum product
- Ecologically safe and free of formaldehyde
Packaging
18 kg bag / 864 kg per pallet
Colour
Light gray to light beige powder
Product Details
Composition
Modified amino acid
Shelf life
24 months shelf life from date of production if stored properly in undamaged, unopened, original sealed packaging
Storage conditions
Dry storage at temperatures up to +40°C. Protect from direct sunlight.
Bulk Density
Approx. 0.78 g/cm3
pH-Value
8 - 10 (3% solution)
Application
Compatibility
Retardan®-2025 P may be combined with many other Sika products and most commonly used gypsum additives including superplasticizers, foaming agents / defoamers and stabilizers. In these combinations i.e. with Sika® ViscoCrete® superplasticizers, additional improvements in flow and setting-time adjustment can also be achieved.
Note: Always conduct trials before combining products in specific mixes and contact our Technical Services Department for additional information about specific combinations with other products.
Dispensing
The product is added directly to the dry-mix.
Recommended Dosage
Typical dosage rage: 0.005%-0.1% of dry weight. Differences in calcium sulfate binder type, raw material sources, calcining methods, age and storage conditions of the binder and other conditions and factors at the plant and/or on-site can also influence the setting time of gypsum binders and therefore the dosage requirements of Retardan®-2025 P.
Note: Preliminary testing is required to determine the exact dosage for specific applications and conditions. Please contact our Technical Services Department for any additional information and assistance.