Concrete Repair

Rebar Corrosion Protection

Monneli Betofer

Corrosion-Proof Cement Slurry for Steel Reinforcement

It is used as a protection for steel reinforcement against corrosion when concrete repair is needed.
BETOFER can also be employed as an adhesive primer for the repairing mortars or for new concrete castings onto the old one.
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Technical Information
Product Description

BETOFER is a two component cement based mortar. Component (A) is a powder consisting of hydraulic binders and special additives. Component (B) is a liquid consisting of selected polymers and migrating inhibitors of corrosion. The two components must be mixed at the moment of use without addition of water or any other product.

  • Excellent adhesion to concrete and steel
  • Excellent corrosion resistance
  • Formulated for use with Colmef concrete repair products
  • High water and vapor resistant
  • Impermeability (2 mm layer of hardened BETOFER is resistant against CO2 diffusion in same degree as 320 cm layer of concrete)
  • High straining ability
  • BETOFER increases significantly the adhesion of mortar to steel reinforcement
Packaging, Coverage / Consumption


BETOFER is packed in two components kit; 1.5kg Powder in plastic bag and 0.5 kg Liquid in plastic bottle.



0.65 m²/kg for 1 mm thickness

Shelf Life & Storage


The product must be kept in dry well covered place at temperature not less than +5ºC and not more than +35 ºC. Shelf life is 12 months if stored as recommended.

Technical Properties



Dense mix

Component A
Appearance Grey powder


Component B
Appearance Liquid
Density 1.04kg/L


Mix density

1.5 kg/L


0.4 g/L

Mixing ratio in weight
Comp A Comp B


pH of mixture at 25ºC


Adhesion to concrete after 28 days (BS 1881 Pt 207)

>2.0 N / mm²

Adhesion to steel after 28 days

1.9 N / mm²

Slant shear bond strength (BS 6319-4)

20 N / mm²

Salt spray test (ASTM B117)


Pot life time of mixture at 25ºC

45 minutes

Test performed at 25ºC, 50% of relative humidity and in absence of ventilation.
Application Information
Instructions for use


BETOFER is composed of two components that must be mixed at the moment of use. Pour the liquid (Component B) into a clean container and then add the powder (Component A). Mix till a homogeneous lump free mix is achieved. The mixture must be applied within 45 minutes from its preparation.


Apply BETOFER using a brush in one coat. If necessary to apply second coat, it should be applied at a right angle to the previous coat after at least 2 hours and within 24 hours from the previous coat. Make sure that the whole steel surface is completely covered. The average total thickness of BETOFER should not be less than 1 mm.

Repairing mortars such as BETOCEM FIBRE, BETOCEM HCS or BETOCEM HR) can be applied after 4 to 5 hours from the time of applying BETOFER.


Tools and equipment used should be cleaned promptly with SOLVENTE 10.


Protect the applied product from the direct sunrays, freeze and rain up to the complete hardening

During Summer Season, working area should be covered to prevent the direct sun effects. Keep equipment and material cool

Surface Preparation

The reinforcing bars must be clean from weak concrete, grease substances and rust. Sandblasting would be advisable for cleaning deep rust. Continue cleaning until all rust is removed. Exposed reinforcement can also be cleaned mechanically or by using a stiff brush tool.

Additional Information
Health & Safety

During application, wear appropriate protective clothing, goggles, gloves and respiratory equipment if necessary.

In case of contact with skin, rinse with water and again wash thoroughly with soap and water. In case of contact with eyes, rinse with plenty of water and seek medical advice accordingly.

If ingested, obtain medical attention immediately. Do not induce vomiting.

Important note

The information in this Technical Data Sheet is based on Colmef Monneli’s experience. Colmef Monneli does not accept any liability arising from the use of its products as it has no direct or continuous control over where or how its products are applied. All Colmef Monneli’s Data Sheets are updates on regular basis. It is the user’s responsibility to obtain the latest version.

additional materials
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Technical Properties Sheet
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