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Watco Concrex Deep Fill

Economical and strong repair formula for deep holes

  • Fills holes up to 100mm deep in one layer
  • Ideal for heavy traffic areas
  • Easy to mix and apply
  • Interior and exterior use
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Frequently bought together


Concrex® Deep Fill is ideal for filling deep holes quickly and economically! This formula contains less resin than other Watco Concrex products and is reinforced with a granite aggregate. This makes it a cost effective alternative to the other Watco Concrex products when filling deep holes. Concrex Deep fill can be used in one layer between 15mm - 100mm. It can be left as a wearing surface which has a coarse textured finish. If a smooth finish is required use Concrex Deep Fill to within 5mm of the floor level, and then overlay with Watco Concrex Carbon Fibre.

Recommended areas of use

  • Suitable for use inside and out
  • Concrete, sand and cement, metal
  • Holes in concrete floors
  • Damaged steps
  • Broken floor joints
  • Eroded, uneven concrete

Features of Concrex Cold Set Deep Fill

  • Cost-effective: more economical than other Concrex® products for filling deep holes
  • Easy to use: mix the two components and apply
  • Priming: not usually required, however Watco Tack Coat is a recommended epoxy adhesive primer designed to increase bonding in difficult areas
  • Depth: apply from 15-100mm thick in one layer, reducing downtime
  • Can be used as a base layer under any Watco Concrex product
Suitable for Concrete, sand & cement and metal.
Appearance Smooth, impervious surface.
Interior or Exterior Interior and exterior
Composition Sand, granite and resin blend plus a 500ml bottle of grey curing agent.
Coverage 0.5m² per 25kg at 30mm thick.
Application tools Steel float or trowel.
Curing time 5-6 hours at 20°C
Minimum application temperature 10°C
Pot life Up to 30 minutes.
Storage Between 10°C - 30°C. Do not allow to freeze.
Shelf life 12 months in unopened container.
Depth (mm) 15mm-100mm
Principle limitations Do not apply to wet surfaces. Do not apply thicker than 100mm in one layer. Watco Concrex Deep Fill should not be subjected to temperatures above 60°C
Cleaning tools Use white spirit before concrex colours cures.

Surface preparation

Surfaces should be clean, dry and free of all loose material. Wire brushing or sweeping is generally sufficient. Watco Bio-D degreaser can be used to remove grease and oil. 


A primer is not usually required if patch or crack repairing. Watco Tack Coat adhesive primer is recommended when applying Watco Concrex as a thin section screed or when applying to smooth, non-porous or metal surfaces. Watco Tack Coat is always required with Concrex Vertical and Concrex Vertical Cold Cure.

Watco Concrex Deep Fill Mixing and application

Each Watco Concrex pack contains a granular resinous compound and separate containers of curing agent. The components are mixed with a trowel according to the simple instructions in the pack until a smooth grey mortar is obtained. The more thorough the mixing, the ‘wetter’, smoother and more manageable the mix becomes. This can be achieved quite quickly by wearing disposable gloves and kneading the mixture by hand. A creteangle or similar mixer can be used to ensure thorough mixing of larger quantities. This is trowelled firmly against the surface to be repaired, and finished with a trowel or float. To prevent drag on the trowel, a rag moistened with white spirit may be wiped across the face of the tool.

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£209.00 (Ex VAT)

In stock

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Bulk discounts save up to 20%
Quantity Price per item Discount
1+ £209.00 -
6+ £188.10 Save 10%
18+ £167.20 Save 20%
Bulk discounts applied in basket

Tools and accessories

Watco Concrex Application Kit

Watco Concrex Application Kit

Everything you need for applying Concrex

From £16.00  (Ex VAT)

Watco Tack Coat

Watco Tack Coat

High strength 100% solids epoxy resin adhesive primer

From £24.80  (Ex VAT)

Trowels and Floats

Trowels and Floats

Ideal for mixing, applying and levelling repairs

From £3.60  (Ex VAT)

Wire Brush & Scraper

Wire Brush & Scraper

A useful tool for removing rust and old coatings

£2.70  (Ex VAT)

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