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Watco Concrex Sub Zero

For essential concrete repairs during the winter months and cold environments

  • Ideal for use in freezer or chiller rooms
  • Use inside or out as low as minus 20°C
  • Heavy duty, polyaspartic resin repair mortar
  • Exceptionally durable for heavy traffic areas
  • Repairs can be feather edged
Frequently bought together


Concrex® Sub Zero is ideal for thin section and feather edge repairs which have to be undertaken in freezing conditions. The latest version incorporates polyaspartic technology and will cure as low as -20°C. It has excellent strength and chemical resistance and can be applied into cold areas where ordinary repair mortars would fail. It is ideal for repairs to any unheated area, internal or external and is suitable for application to concrete, metal and sand & cement.

Recommended areas of use

  • It is ideal for repairs to any unheated area, internal or external
  • Suitable for application to concrete, metal and sand/cement


  • Heavy duty polyaspartic resin repair mortar
  • Exceptionally durable for heavy traffic areas
  • Can be used at temperatures as low as minus 20°C
  • Repairs can be feather edged
  • Chemical resistant and non-dusting
  • Can be applied to concrete and metal


Suitable for Concrete, sand & cement and metal
Appearance Mid Grey
Finish Smooth, impervious surface
Interior or Exterior Exterior, Interior
Composition A polyaspartic based repair mortar comprising of a pigmented resin, clear curing agent and a blended aggregate
Number of components 3
Coverage 1.2m² at 5mm thick per 10kg
Application tools Steel float or trowel
Application Trowel the mortar firmly into the repair
Curing time (at -20°C) 48 hours
Curing time (at 0°C) 16 hours
Curing time (at 15°C) 5 hours
Minimum application temperature -20°C
Pot life 30 minutes to 1 hour, depending upon temperature. If Concrex Sub Zero is used past its working life, trowelling will become difficult and adhesion reduced
Storage Between 10°C - 30°C
Shelf life 12 months in unopened container
Depth 50mm
Cleaning When fully cured, proprietary detergents or degreasants may be used to clean the surface
Cleaning tools Equipment used for mixing and applying should be wiped clean with white spirit or a similar solvent before the Concrex Sub Zero cures


Surface preparation

Surfaces should be clean, dry and free from any surface contamination. Wire brushing and sweeping is generally sufficient. Watco Bio D can be used to remove grease and oil.


Each pack contains one tin of curing agent, one tin of resin and a blended aggregate. Thoroughly mix the two liquid parts together before tipping the mixed components into the blended aggregate. The best mix can be achieved quickly by wearing disposable gloves and kneading the mixture by hand. 


Once mixed, the product is trowelled firmly against the surface to be repaired and finished with a steel trowel or float. To prevent trowel marks, a rag moistened with white spirit may be wiped across the face of the tool.

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£146.20 (Ex VAT)

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