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Watco Concrex Sub Zero

For essential repairs during the winter months

  • Ideal for use in freezer or chiller rooms
  • Use inside or out as low as minus 20°C
  • Heavy duty, feather edge repairs
  • Easy use, just mix and pour

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.

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


  • Cures down to -20°C
  • Virtually indestructible
  • May be feather edged
  • Chemical resistant and anti slip
  • Impermeable and non-dusting
  • Watco Tack Coat Primer Sub Zero is essential for shallow applications and screeding
Suitable for Repairing damaged concrete in cold room floors or external areas.
Surfaces Concrete.
Interior or Exterior Interior and exterior.
Coverage 1.2m² at 5mm per 10kg unit.
Pot time (hours) 30 minutes to one hour, depending upon temperature. If Concrex Sub Zero is used past its working life, trowelling will become difficult and adhesion reduced.
Curing time 3-5 hours at 15°C, 12-16 hours at 0°C, 48 hours at -20°C.
Minimum application temperature -20°C.

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.

Case studies

£100.60 (Ex VAT)

In stock

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Tools and accessories

Trowels and Floats

Trowels and Floats

Ideal for mixing, applying and levelling repairs

From £3.20  (Ex VAT)

Watco Concrex Application Kit

Watco Concrex Application Kit

Everything you need for applying Concrex

From £14.50  (Ex VAT)

Watco Tack Coat

Watco Tack Coat

High strength 100% solids epoxy resin adhesive primer

From £22.50  (Ex VAT)

Wire Brush & Scraper

Wire Brush & Scraper

A useful tool for removing rust and old coatings

£2.50  (Ex VAT)

Watco Bio-D

Watco Bio-D

A heavy duty biodegradable cleaner for floor preparation

From £20.00  (Ex VAT)

Watco Low Odour White Spirit

Watco Low Odour White Spirit

Ideal for cleaning tools after application

£4.80  (Ex VAT)

What our customers say

Help & Advice

Contact our friendly and professional Technical Advisors for expert help and advice for your project. You can give us a call on 01483 418 418 or email

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