Renderoc HB

Fosroc International Limited Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

A single component, lightweight, fibre and polymer modified concrete reinstatement mortar for high build applications.

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For the reinstatement of large areas of concrete and for small, localised patch repairs. It is specifically designed for vertical and overhead high-build applications. Renderoc HB can be applied in sections up to 80 mm thickness in vertical locations and up to 50 mm thickness in overhead locations in a single application and without the use of formwork. The mortar is suitable where exceptional chloride and carbon dioxide resistance is required.


  • Lightweight formulation enabling extra high-build applications.
  • Reduces the need for formwork.
  • Can be applied by the wet spray process.
  • Excellent bond to concrete substrate.
  • Shrinkage compensated.
  • Contains no chloride admixtures.

General information

Uniclass 2015

Pr_20_31_53_15 Concrete repair mortarsPrimary


C42/310 Repair mortar

C42/325 Proprietary sprayed mortar/ concrete

C42/335 Proprietary concrete for small area repairs

Specification data - Concrete repair mortars

Product Reference

Renderoc HB


High-build, lightweight fibre and polymer modified cementitious mortar

Standard product features

CE marking:

  • Declaration of performance: UK9-28.
  • Standard: BS EN 1504-3.
  • Compressive strength: Class R2 (>15 MPa).
  • Chloride ion content: ≤0.05%.
  • Adhesive strength by pull-off test: ≥0.8 MPa.
  • Thermal compatibility (freeze-thaw cycling with immersion): ≥0.8 MPa.
  • Reaction to fire: Class A2.
  • Dangerous substances: Complies with 5.4.

Compressive strength (BS EN 12190:1999):

  • One day: 10 MPa.
  • 28 days: 22 MPa.

Setting time:

  • Initial set: 3.5 hours.
  • Final set: 5.5 hours.

Third party certifications
  • European Standards: EN 1504 - CE
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