Weber Saint-Gobain - Official website of the company

weberep ST

weberep ST
weberep ST

Product benefits

  • Non-shrinking
  • High strength
  • Good resistance to sea water and to high-sulphate

Non metallic non shrink fiber reinforced repair mortar

weberep ST is a ready-to-use mortar mainly made of sand (reconstituted grain size range), special cement, fibres and additives that provide unique properties: non-shrinking, high strength, high adhesion and compactness. The highly compacted grains slows down carbonation.

Product Features

Scope of use

  • Repair of concrete surfaces, honeycombing, edges of steps and all types of load bearing situations
  • Restoring the structure of damaged construction: columns, slabs, vault, mats and dam overflows
  • Reinforcing of weakened structures such as balconies, pedestals and cornices


Active ingredients

Grain size
Mixing water
Fresh density ASTM C185- 02 section 5.2

hydraulic binders, synthetic fibers, without any chlorides or metal particles
Grey Powder
0 to 2.5 mm
7.5 - 8.5 liters / 50 kg bag, 3.75 - 4.25 liters (3.25 - 3.75 liters for Lebanon) / 25 Kg bag
25 liters / 50 kg bag, 12.5 liters / 25 Kg bag
5 to 50 mm in one coat
2.05 - 2.15

Applicable standards

BS EN 196-1 : 1994
BS EN 6319 Part 2
BS EN 6319 Part 3
BS EN 6319 Part 7
BS 1881 Part 207 :1992 section 8
BS 6920: Part 1: 2001


12 months after manufacturing date in original and non-open packaging, under cover, in dry condition, away from humidity, protected from extreme temperatures and direct sunlight.


Technical datasheet

Printable MSDS (PDF)

Send or download the documentation

You can either send the documentation to an email address, or download it.

Instructions for use

Product preparation

Mix a 50 kg bag weber.rep ST with 7.5 to 8.5 litres of clean water (half the quantity of water for a 25 kg bag) until a smooth paste is obtained. For Lebanon, mix 3.25 to 3.75 lit. of clean water with a 25 kg bag.

Product application

Surface preparation

weber.rep ST may be applied on sound concrete, masonry, rock or similar materials.
Remove damaged concrete and laitance by chipping with a pick or cold-chiselling to get a rough surface.
The area must be surrounded by clean edges. Do not feather edges.
The surface must also be free from any trace of grease or oil.
Brush or scrape corroded steel with a metal brush, or sand it to remove all rust particles. Remove dust from all surfaces to be fixed. For an optimal protection of steel, apply Conrep.370 PF by brush prior to weber.rep ST.

Saturate the surface with water by copiously spraying just before application, and if possible, 6 hours before application as well.

Product application

weber.rep ST can be applied:

  • Manually with a trowel.
  • By using a dry or wet spraying machine.
  • By pumping.

weber.rep ST must be used within one hour from mixing.
For thickness more than 50 mm, it is recommended to apply weber.rep ST in 2 layers. When the first coat is applied it must be directly roughened to increase bonding with the second coat.
Re-mixing with an extra amount of water is forbidden. After application, protect the surface by using a curing compound like Cure WH or Cure Y 40 by covering with properly secured plastic sheeting.
Ideal application temperature is between +5 ºC and +35 ºC.

Environmental and Safety


While the company guarantees its products against defective materials, the use and application of these products are made without guarantee since the conditions of their application are beyond its control. It is recommended to verify with the company that the product is suitable for the intended use, and that this Data Sheet version is the latest one. The company may modify it without prior notice. Technical characteristics are listed for guidance only. For more information, please contact the company’s office in your location.


The information included on this Technical Data Sheet is the sole property of SODAMCO Holding. The unauthorized disclosure, use, dissemination or copying (either whole or partial) of this data sheet or any information it contains, is prohibited and subject to legal pursuit.

Available packaging

Lebanon25 kg
Syria25 kg
Jordan25 kg
KSA25 kg
UAE50 kg
Qatar25 kg
Kuwait25 kg
Oman50 kg