Your browser version is not officially supported, and you may experience a degraded service. Please upgrade your browser.

Watco Concrex Vertical Cold Cure

Permanent repairs to vertical surfaces in cold conditions

  • Lightweight, non-slump formulation
  • Cures at 0°C
  • Durable, impervious finish
  • Strong two-pack epoxy resin mortar
  • Excellent adhesion and durability
Frequently bought together


Watco Concrex® Vertical is a two part epoxy resin mortar with special lightweight fillers and is approximately a third of the density of ordinary mortars. This means it can be used repair damaged concrete pillars, sills, lintels, beams, render and stonework without slumping or falling out as the repair sets. It is ideal for frost spalled concrete surfaces with exposed reinforcement. Apply at any depth without the need to build up layers. Watco Concrex Vertical Cold Cure is ideal for repairing damaged masonry on vertical surfaces in cold rooms or externally.

Recommended areas of use

  • Damaged concrete pillars, sills, beams, render and stone work
  • Frost spalled and damaged concrete surfaces
  • Areas with exposed reinforcement


  • Will not slump during application
  • Will not shatter under impact damage
  • Durable and impervious finish
  • Provides excellent chemical resistance
  • Will hold lightweight fixings while wet or can be drilled after curing
  • Coverage approx. 0.6m² per 2.5kg at 5mm thick
  • Concrex Vertical Cold Set cures in temperatures as low as 0°C
  • Apply at any depth without the need to build up layers
  • Watco Tack Coat Sub Zero is required for all vertical applications


Properties Special lightweight fillers, will not slump during application, will not shatter under impact damage, cures fast to a durable and impervious finish
Suitable for Concrete, sand & cement and metal
Appearance Grey
Finish Smooth, impervious surface
Interior or Exterior Exterior, Interior
Primer required Watco Tack Coat Sub Zero is required before making repairs to vertical masonry with Concrex Vertical Cold Cure.
Composition Epoxy resin mortar with lightweight fillers
Number of components 2
Coverage 2.4m² at 5mm thick per 10kg
Application tools Steel float or trowel
Application Trowel firmly onto the surface
Curing time (at 0°C) 24 hours
Minimum application temperature 0°C
Pot life Up to 30 minutes
Storage Between 15°C - 25°C for at least 8 hours prior to use. Do not allow to freeze
Shelf life 12 months in unopened container
Depth (mm) 500mm
Principle limitations Concrex Vertical has excellent adhesion, chemical and weather resistance but due to the lightweight fillers used it will not have the same resistance to impact damage as Watco Concrex. Concrex Vertical however, will not shatter like concrete under impact. Concrex Vertical may not be impervious at thickness less than 5mm. Concrex Vertical is not suitable for structural or bonding applications and is intended for surface facing and filling only
Cleaning When fully cured, detergents or degreasants may be used to clean the surface. Do not steam clean or subject to temperatures of excess of 60°C
Cleaning tools Clean with white spirit or similar before Concrex Vertical 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. If the surface is damp, it should be primed with Watco Tack Coat Sub Zero


Watco Tack Coat Sub Zero is required before making repairs to vertical masonry with Concrex Vertical. Watco Tack Coat Sub Zero is recommended when applying Concrex as a thin section screed or when applying to smooth, non-porous or metal surfaces. Watco Tack Coat Sub Zero enables repairs to be made to damp areas. 


Each pack of Concrex contains aggregate pre-blended with resin and the curing agent. If the entire pack of Concrex cannot be used within 30-60 minutes the products can be part mixed. To split a pack, carefully halve the aggregate/ resin mix (ideally divide it by weight) and use half the number of curing agent bottles or tins. Do not split the contents of a curing agent bottle or tin. Do not mix inside the plastic bucket. Wearing protective gloves, tip the aggregate on to a mixing tub or board. Shake the bottles or tins of curing agent thoroughly until the liquid is a uniform colour. Form the aggregate into a mound and leave a small hole in the middle.
Empty the curing agent into the hole, ensuring the bottles or tins are completely drained. Carefully mix the aggregate with the curing agent using a trowel until a smooth mortar is obtained, this will take several minutes. The more thorough the mixing, the ‘wetter’, smoother and more manageable the mix becomes. Alternatively, you can knead the mixture by hand, but you must wear suitable gloves. It is important to mix thoroughly until you achieve a consistent colour. Machinery such as a ‘Cretangle’ mixer or suitable open pan mixer can be used to ensure thorough mixing of large quantities.


If appearance is critical we recommend the application of a small trial area first. 
Trowel firmly against the surface to be repaired, and finish with a trowel or float. To prevent ‘drag’ on the trowel, moisten a rag with white spirit and wipe it across the blade which will allow you to create a smooth finish. Concrex is normally applied in thicknesses of 5-50mm, but repairs can be feather-edged for a neat finish, as long as the majority of the repair is at least 5mm thick. For repairs deeper than 50mm, apply in separate layers (allow 6-8 hours between layers for curing) or use Watco Concrex Deep Fill (which can be applied 15-100mm thick in one layer). There is no need to reapply Watco Tack Coat Sub Zero if building up in layers.



Ask a question


Be the first to ask a question...

Ask a question
0 questions / 0 answers

€155.80 (Ex VAT)

In stock

Do you know the volume of the area?

Tools and accessories

What our customers say

Watco Concrex Vertical Cold Cure