Saint-Gobain Gyproc Egypt

Head Office: 94, Tahrir St. 2nd Flr
Maghrabi Plaza, Dokki, Giza , Egypt

Nahdet Sina

Nahdet Sina is high quality gypsum extracted from Sinai rocks- with 94% whiteness used for cornices and decorative forms moulding.

Key facts

  • Medium setting mortar for big size cornices and forms moulding
  • Very High whiteness
  • Extracted from high quality Sinai rocks
  • One component pre-mix -only water addition is required
  • Moulding
  • Pre-cast cornices
  • Gypsum forms
  • Optimum for big size cornices and forms moulding which need medium setting times



Substrate must be sound, free from dust, loose particles, cement laitance, curing compounds, oil, grease or any other contamination


Nahdet Sina is sprayed on water with the right ratios (Don’t add water to powder), then leave for 2 minutes till it soaks completely. Stir the mix perfectly in all directions till reaching a homogeneous mortar with the convenient consistency for the application. It is preferred to use mechanical mixing.

Nahdet Sina is used for moulding purpose, fill the mould with the product as the standard practice.




Fineness 2 - 6 % retained on 150 mm sieve (by weight)
Fluidity 150 - 200 mm.

Wet Density

1500 gm/l

PH Value


Workability Time

8 -12 minutes (by standard knife)

Flexural strength 

4 - 5 N/mm²     (depending on WGR)
Compressive strength 10 - 15 N/mm²     (depending on WGR)
Hardness 70 - 80 Shore C  (depending on WGR)
Final Setting time 25 - 30. @ 40 shore A (by DUROMETER)

%  Mixing water

70 -76 ml/100 gm.


> 94% by colour meter (Hunter system)

Lumps Must be free of any lumps after normal hand mixing for 2 min . in lap
Sodium chloride Traces
Crystal water 4 - 6 % by weight

Storage & Packing:

Nahdet Sina is supplied in 30.3KG paper sacks constructed in two layers; the innermost layer should be brown paper, the outermost layer should be brown paper suitable for the bag design which is specified by Marketing Department and according to the corporate identity.

The construction of the sacks ensures that the contents will be protected adequately under normal conditions of transport, storage and handling, within the claimed shelf life for 3 month, avoiding direct contact with water in proper storage conditions.

Each sack should be marked with the date of filling or production.

  • Packs / Ton:  33

Storage Conditions:

Must be stored in a dry area away from the reach of humidity or any water source, preferably on wooden pallets and covered with impermeable cover to maintain a steady quality the longest duration possible


  • Storage Validity: 3 months 


Gypsum Building Plaster (B1) with an initial setting time <20 min and compressive strength ≥ 2,0 N/mm²


EN 13279-1 - B1/20/2

Related products

Nahdet Sina can be used with the following products

Customer Service Hot Line 19230

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