Home > Companies > Ronacrete Ltd > Ronafix Admixture for Concrete Repair

Ronafix admixture produces Ronafix Mix D, a high strength waterproof, frost resistant mortar with very low permeability to CO2 gas. It is suitable for repairing reinforced concrete.


  • Impermeable to liquid water.
  • Improves wear resistance and resistance to freeze/ thaw cycling.
  • Increases compressive and flexural strength.
  • Reduces compressive modulus.
  • Reduces shrinkage, water demand and aids early drying.


  • Prepare concrete in accordance with instructions.
  • Prime exposed steel and prepared concrete with a slurry of Ronafix and cement 1:1 by volume.
  • Apply mortar to wet or tacky primer.
  • Build multiple layers, as required; prime between layers.
  • Cure using Ronacrete Curing Membrane or cover with tight fitting polythene.
  • As required, apply further coatings or treatments.

NBS Specification

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This product is associated with the following NBS Create clause:
45-55-04/367 Polymer admixture

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Ronacrete Ltd


+44 (0)1279 638700

Product reference

Ronafix Admixture for Concrete Repair

Manufacturer details

Ronac House,
Flex Meadow,
Essex, CM19 5TD
Tel +44 (0)1279 638700
Fax +44 (0)1279 638701
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