• Blackfriar Concrete Repair Mortar

Blackfriar Professional Concrete Repair Mortar


We no longer stock this product, but can recommend Rust-Oleum 5180 Epoxy Repair Mortar as a great alternative.



Blackfriar Concrete Repair Mortar is a two-pack, high performance, quick hardening epoxy concrete repair mortar for damaged and eroded concrete, masonry and brick surfaces within heavy traffic areas. It forms a strong and permanent bond to concrete surfaces.


Ensure the surface to be painted is sound, clean, dry and free from grease or any substance liable to give adhesion problems. Wire brushing or sweeping is generally sufficient. If the surface is damp it can be primed with Blackfriar Professional Damp Proof Primer. A primer is generally not needed if patch or crack repairing but if Blackfriar Professional Concrete Repair Mortar is to be applied in thin section or to smooth or non porous surfaces use Blackfriar Professional Oil Tolerant Primer.


The base and activator components each contain resin damped aggregates. Discharge the entire contents of each component onto a mixing board, then mix together using a trowel until a uniform colour is produced. Using a trowel or a plaster’s float apply the product firmly against the prepared surface. To prevent drag on the trowel and to produce a smooth finish, lightly wipe the tool with a rag moistened in white spirits.

Blackfriar Professional Concrete Repair Mortar is normally applied to a thickness of 5 to 50mm on horizontal surfaces (up to 10mm on vertical) and can be feather edged to produce a neat finish as long as the main repair is at least 5mm thick. For repairs deeper than 50mm apply multiple layers allowing 6-8 hours @20°C between layers. Blackfriar Professional Concrete Repair Mortar cures at temperatures above 10°C. Do not steam clean or subject the finished repair to temperatures above 50°C. In some circumstances discolouration may occur on some vinyls when laid over repairs. Use product within 30 minutes of mixing @20°C.

Drying Time

Light traffic accepted after 6hrs @20°C. Heavy traffic accepted after 12hrs @20°C. Allow to dry for a minimum of 6-8hrs @20°C between coats. Blackfriar Professional Concrete Repair Mortar cures at temperatures
above 10°C.

Clean Up

Remove as much product from application equipment as possible before cleaning with White Spirits before mortar cures. Do not empty into drains or watercourses. Some local authorities have special facilities for the disposal of waste coatings.

Key Features & Benefits:

  • Ideal for filling cracks, holes and large voids.
  • Perfect for roads, ramps, car parks, driveways, pavements, loading bays and warehouse floors.
  • Resists common chemical spillages including petrol, dilute acids, caustic soda and mineral oils.
  • Indoor and outdoor use.

Please contact Rawlins Paints' Technical Support Team on 0113 2455450 for more information.

Product Details

Data sheet

Blackfriar Professional
For Use On
Application Method
Standard / Ready Mixed
Single, Two or Three Pack
Pack Size
Base Type
Solvent Based
Minimum Applied Thickness
Pot Life (at 20°C)
30 mins
0.1m² per KG (5mm depth)
Recommended Thinner/Cleaner
White Spirit (cleaning only)
Touch Dry
6-8 Hours
UN Number (Activator)
UN Number (Base)

Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.

questions Ellen Shore on 2019-08-22 16:41:10

I have some areas of my garage cracked and irregular levels need repair Is this suitable?


This product would be suitable for larger repairs if you have these, Rust-Oleum Epoxyshield Fine Crack Repair would be more suited to fine cracks.

questions Kelley on 2017-01-31 19:46:55
Question: I have a blown window lintels. Can you advise the beSt product to use. I am also considering covering all of my concrete lintels and sills to make a smooth finish. What product would you recommend for this?

We recommend Rust-Oleum 5110 Verti-Patch for vertical and overhead repairs. Once repaired, you could coat the areas in something like Rust-Oleum Mathys Murfill Waterproofing Coating to provide a tough, flexible, waterproof finish.

questions Lin Beverley on 2016-04-17 19:36:25
Question: Hi I have two small concrete gate posts in need of repair, can you recommend what I could use.

Blackfriar Professional Concrete Repair Mortar would be ideal for any horizontal repairs and our 202 Vertical Surface Repair Mortar would be perfect for any vertical repairs.

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