Uses: deep holes in heavily trafficked areas.

Apply from 15–100mm thick in one layer

Excellent compressive strength

New formulation allows easy and quicker application of thicker layers. Provides an ideal and cost-effective foundation before finishing with other Watco Concrex products.

Coverage approx. 1m² per 50kg at 30mm thickness.

Application Video

Surface Preparation
Surfaces should be clean, dry and free of all loose material. Wire brushing or sweeping is generally sufficient.
href="http://www.watco.co.uk/watco-bio-d-3092.html"style="color:#cc0000">Watco Bio D degreaser can be used to

remove grease and oil. If the surface is damp, it can be primed with
href="http://www.watco.co.uk/watco-tack-coat-damp-prime.html"style="color:#cc0000">Watco Tack Coat Damp Prime.

Priming

A primer is not usually required if patch or crack repairing.
href="http://www.watco.co.uk/watco-tack-coat.html"style="color:#cc0000">Watco Tack Coat is recommended when

applying Concrex as a thin section screed or when applying to smooth, non-porous or metal surfaces.
href="http://www.watco.co.uk/watco-tack-coat-damp-prime.html"style="color:#cc0000">Watco Tack Coat Damp Prime

enables repairs to be made to damp areas.

Mixing
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 tray 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.

Application
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.