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webercem spray RSF - Dry-sprayed Concrete.

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Saint-Gobain Weber

Rapid-setting and fibre-reinforced dry spray structural repair concrete

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  • Rapid repairs to structures within tidal zones.
  • Repairs to dock walls.
  • Repairs to coastal structures.
  • Structural repairs to jetties, piers, sea walls, quays and docks.
  • Repairs to river bridge abutments or piers.
  • Primary linings to underground workings.
  • Structural repairs to concrete beams, columns and soffits.
  • Repairs to railway bridge and viaduct soffits.


Rapid-setting and fibre-reinforced dry spray structural repair concrete designed to give high strength, low rebound, low wastage and to maxmise application thickness. Added alkali-resistant glass fibres give higher tensile strength, reduce shrinkage cracking and rebound.

Containing graded inert limestone aggregates and dust suppressants, webercem spray RSF has conformity testing to BS EN 1504-3 and meets the requirements for a Class R4 repair product. 

Features and benefits:

  • Rapid setting concrete allows work to continue in tidal zones.
  • Rapid set prevents wash out from tidal action or flowing water.
  • Economical with low rebound.
  • Fibres help improve resistance to cracking and adhesion to concrete substrates.
  • Extra high build – up to 400 mm thickness can be applied in one pass to vertical faces.
  • Total chloride ion content does not exceed 0.05% of the weight of cement. No calcium chloride or admixtures containing chloride salts are used.
  • Good resistance to salts absorption.

General information






Pr_20_31_16_66 Pre-blended concretesPrimary


C42/325 Proprietary sprayed mortar/ concrete

Specification data - Pre-blended concretes


>45 MPa.

Chloride Ion content


Adhesive bond

>2.0 MPa.

Carbonation resistance


Modulus of elasticity

≥20 GPa.

Capillary absorption

≤0.5 kgm-²h-0.5.

Reaction to fire

Class A1.

Thermal compatibility, part one, freeze-thaw

≥2.0 MPa.


To BS EN 1504-3.

Mortar type

Cement-based polymer-modified.

Performance requirement class


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