Product Data Sheet Show all documents

Retardan®-2025 P

Retarder for very low emission calcium sulphate (Gypsum) based dry mortar systems

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
Safety Data Sheet
Product Data Sheet Show all documents

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 and allows the formulation of very low-emission mortar products.
The product is especially suitable for the following applications
  • Production of self-levelling screeds and underlayments
  • Production of gypsum plaster
  • 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
  • Highly efficient set-retardation at very low dosages
  • Easier and more precise dosing
  • 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

Sustainability / Certifications / Approvals

CERTIFICATES AND TEST REPORTS

Emissions measurement according to GEV test method 3.2.3.1: EC 1PLUS
Product Information

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

Approx. 9 (3% solution)

 

Application

Application Information

Dispensing

The product is added directly to the dry-mix.

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.
Consumption

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.

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