• Intercrete 4801 (Monomix HD) 25kg

Intercrete 4801 (Monomix HD) 25kg

SKU: 015MMHD25

£40.36 Ex Vat

Intercrete 4801 (Monomix HD) 25kg

£40.36 Ex Vat


Monomix HD is a high strength, waterproof, shrinkage compensated, standard density mortar with good abrasion resistance for the structural repair, rendering and profiling of vertical, overhead and horizontal surfaces including trafficked areas.

MONOMIX HD will provide lasting, reliable repairs to structural surfaces. The manufacturer’s investment in concrete chemistry and technology ensure the mortar will harden rapidly, without sacrificing density or strength. Requiring only clean water to mix with a float and a trowel to apply, MONOMIX HD will provide efficient, enduring repairs for patching imperfections and rendering larger areas alike. 


MONOMIX HD was utilised in multi-billion pound developments and upgrades to London’s Tube network by Crossrail, as the chosen mortar solution for improvements to Bond Street station’s coving and flooring works. Providing a durable, high strength and waterproof solution, MONOMIX HD ensured a cleaner and safer walking surface to the station, most noticeably in the tube’s signature transition from floor to wall. 

MONOMIX HD has also been deployed in projects such as the Bloomberg London building, Boathouse 4 within Portsmouth’s Historic Dockyard, and Colchester’s water utility infrastructure. 


  • Incorporates the latest proven cement chemistry, microsilica, fibre and styrene acrylic copolymer technology.
  • Pre-packaged material requiring mixing with clean water to give an easily trowellable mortar with maximum application thickness of 80mm in vertical, overhead and horizontal situations.
  • High bond strength exceeds tensile strength of concrete, thus ensuring monolithic performance of the repair.
  • Dense matrix offers low permeability to water, even at 10 bar pressure, and very high diffusion resistance to acid gases and chloride ions.
  • Resistant to sulphates to class DS-5/5m of BRE Special Digest 1.
  • Improved tensile and abrasion resistance. Excellent low sag properties.
  • Economic mortar generally requiring no substrate or inter-layer priming. Part bags can be mixed.
  • Easily overcoated with specialist membranes to provide further protection
  • and aesthetic quality.



One pack will yield 13.1 litres, 76.3 packs per m³ to a 2,100kg/m3 and can be applied to areas requiring between 5mm and 80mm of mortar. At 20°C, flexural strength will be at 56.5MPa 28 days after application. 


MONOMIX HD should not be prepared in a normal concrete mixer; the mortar must be mechanically mixed using either a forced action pan mixer or drill and a paddle in a clean drum. 

It should not be used when the temperature is below 5°C. Although a primer is not usually necessary, BONDING BRIDGE 842 should be applied prior to repairing highly porous substrates.

About the manufacturer 

Flexcrete provide trusted, lasting solutions in concrete repair, protective coatings and waterproofing. Distributing through reputable suppliers such as Resapol, their technical mortars and high-performance coatings are trusted by companies and sole traders across the UK. 

Flexcrete are fellow members of the Concrete Repair Alliance, ensuring any products purchased through Resapol meet the highest standards and are continually improved to match the latest industry innovations. Flexcrete products purchased through Resapol are manufactured to ISO 9001 requirements and have undergone testing to conform to CE standards. 

MONOMIX HD is trusted by contractors from diverse industries including bridges and highways, housing, public transport and energy.