Rapid fixing mortar for concrete floors

aberep FS is a single component, rapid fix cementitious mortar used to patch holes in concrete floors.


aberep FS is particularly useful for smaller patch type repairs to concrete floors offering a minimal amount of downtime. aberep FS can be used to fill holes in concrete floors prior to the application of self-levelling underlayments and/or screeds.




aberep FS (Fast Setting)

  • Ready-to-use, only add clean water
  • Dustless, >80% reduction in the dust during handling and mixing
  • The chemical action of the product is specially formulated to be fast acting, permitting completion of patching in hours
  • Chloride free
  • Constant quality/performance (pre-blended)
  • Non-toxic
Typical Properties
Water content 4.60 L/20 kg
Open time (20°C) 30 minutes
Drop table flow ASTM C230 ≈200 mm
Initial set ASTM C807 40 – 45 min.
Final set ASTM C807 50 – 60 min.
Fresh wet density ≈1800 kg/m³
Compressive strengths – MPa – (ASTM C 109)
1 day 10
3 days 15
7 days 20
28 days 30
Surface Preparation

The substrate must be sound, firm, clean, and free of oil, grease, loose particles, cement laitance, old layers of paint or other contaminants. In severe cases, chemical or steam degreasing might be required.
Ensure that the substrate is roughened to provide a sufficient mechanical key for bonding. When using compressed air for cleaning, the air must be clean and oil free.

Expose any corroded reinforcing steel and grit blast. A clean, bright finish is required ensuring that all corrosion products are removed, particularly from behind the steel.

Bonding / Priming

Absorbent substrates must be thoroughly pre-wetted with clean water to reduce suction, which causes shrinkage and poor adhesion. This must be done at least 12 hours prior to the application of aberep FS. Remove any ponded water prior to the application of aberep FS.

Prime with durabond GP (at approximately 8 m²/L) in lighter structural repairs where structural adhesion properties are not required. The product must be applied to a tacky primed surface and not dry. See the relevant data sheet.

Use epidermix 116 wet-to-dry epoxy as a primer for structural applications (high frequency foot traffic) where the bond strength must be equal or greater than the parent material. See the relevant data sheet.

All exposed reinforcing bars must be primed before initial rust starts by applying durarep ZR primer. See the relevant data sheet.


Forced action mixing is recommended for this type of product with its low water addition and fast setting properties. Do not use free fall mixers. Only one-bag batches should be mixed with a variable (slow) speed industrial drill with an approved spiral paddle.

Note: High speed mixing entraps an excessive amount of air and therefore should be avoided.
Slowly add the powder to approximately 2/3 rds of the required water addition while mixing, preferably mechanically, and mix until lump free. Add the remainder of the water and mix for 3 minutes until the mortar is once again homogeneous. Do not mix for longer than 3 minutes and make sure that the material is placed and finished off within its working life (≈30 minutes).
The plastic state mortar can be applied by trowel, spatula, or float.

Do not re-temper the product.



20 kg of aberep FS powder mixed with 4,6 litres of water yields approximately 13,5 L.
The approximate fresh wet density is 1800 kg/m³.
Wastage and irregular surfaces will reduce the practical coverage rates.




The concrete substrate should be well dampened, with no free water on the surface.

aberep FS is used for repair and restoration of small horizontal areas such as worn, chipped or spalled concrete.

aberep FS is applied a minimum of 5 mm up to 40 mm in thickness in a single application. The product should be well compacted into position, especially around reinforcing steel, generally using a wooden float to obtain good compaction and a dense matrix.

aberep FS is generally finished off to profile by using a steel float to obtain a smooth, dense, and tight surface. When other surface finishes or textures are required, a wooden float or brush can be used.

Never overwork the surface.


Clean tools with water before the mortar hardens. Hardened material can only be removed by mechanical means.

Protection on Completion

In keeping with recommended cement and concrete practice, aberep FS must be cured by applying a suitable curing membrane to the area as soon as the finished surface will not be marred. This is carried out by applying, by brush or spray, a suitable curing compound like duracure WB or durabond GP if available or as recommended by a.b.e.®

In rapid drying conditions caused by high winds or direct sunlight additional precautions should be included, such as sealing the area with polythene sheeting and taping the edges down. This may include damp hessian behind the sheeting to prevent moisture loss. Similarly, in cold conditions, the repaired area must be protected from freezing.

For additional protection properties, aberep FS is fully compatible with the abecote® and duracote ranges of coatings. Take care to remove any curing compounds before attempting to overcoat. It is recommended to use durabond GP as a curing compound if it is planned to overcoat the repair area. Please consult a.b.e.®’s technical department for advice on these coatings.


Temperature & Relative Humidity

Surface and ambient temperature must be at least 5 °C and rising, ideally between 20 °C and 30 °C.


Model Specification

Rapid fix cementitious repair mortar.

The repair mortar will be aberep FS, a rapid fix, single-component cementitious mortar applied in accordance with the recommendations of a.b.e.®, including the appropriate primer. The mortar must have a minimum 28-day compressive strength of 30 MPa.




aberep FS is supplied in 20 kg paper bags.
Product code: 91210 020

Product codes for abeprime SLC acrylic primer:
1ℓ: 50105 001
5ℓ: 50105 005
25ℓ: 50105 025



Handling & Storage

This product has a shelf life of 12 months if kept in a dry cool place in the original packaging. In more extreme conditions shelf life will be shortened.

Health & Safety

aberep FS is alkaline and must not be allowed in contact with skin and eyes. Avoid inhalation of dust during mixing by wearing dust masks. The use of gloves, eye protection and dust masks is advised. Immediately wash with water in the event of contact with skin.

Splashes into eyes should also be washed immediately with plenty of clean water and medical advice sought thereafter. If swallowed seek medical attention immediately without inducing vomiting.

Important Note

This data sheet is issued as a guide to the use of the product(s) concerned. Whilst a.b.e.® endeavours to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot – accept any liability for application – because a.b.e.® has no direct or continuous control over where and how a.b.e.® products are applied.

Further Information

Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total

a.b.e.® has a wealth of technical and practical experience built up over the years in the company’s pursuit of excellence in building and construction