Product Data Sheet Show all documents

Sika MonoTop® R-40

Polymer modified cementitious patch repair mortar

Sika MonoTop® R-40 is a one part, thixotropic, polymer modified, cementitious mortar containing silica fume. It cures to produce a high strength mortar with enhanced polymeric properties. Sika MonoTop® R-40 exhibits high bond strength, greatly reduced water and carbon dioxide permeability and improved resistance to oils and chemicals.

  • Fast and easy to apply in layers up to 40 mm thick
  • Compatible with the thermal expansion properties of concrete
  • Chloride free
  • Non corrosive to reinforcing steel
  • Non toxic, suitable for potable water
  • Contains fibres to prevent micro cracks
  • Non shrink
  • Excellent freeze/thaw resistance
  • Good resistance to water immersion
Product Data Sheet Show all documents

Usage

  • Fast repairs to horizontal or mortar surfaces above and below ground level
  • Filling and repair mortar for voids, honeycomb areas, etc.
  • Repair of spalled concrete caused by reinforcement corrosion
  • Repairs with improved resistance to oils, sewage, chemicals, etc.
 

Advantages

  • Fast and easy to apply in layers up to 40 mm thick
  • Compatible with the thermal expansion properties of concrete
  • Chloride free
  • Non corrosive to reinforcing steel
  • Non toxic, suitable for potable water
  • Contains fibres to prevent micro cracks
  • Non shrink
  • Excellent freeze/thaw resistance
  • Good resistance to water immersion

Packaging

25 kg bag

Colour

Concrete grey powder

Product Details

Product Information

Shelf Life

6 months from the date of production

Storage Conditions

Store properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Keep away from direct sunlight, rain and water.

 
System information

System Structure

Sika MonoTop® System comprises:

  • Sika MonoTop®-610 MY bonding bridge and reinforcement protection
  • Sika MonoTop®-615 SD or Sika MonoTop®-R or Sika MonoTop® R-40 repair mortar
  • Sika MonoTop®-620 MY pore sealer / fairing coat
Technical Information

Compressive Strength

24 hours

> 15 N/mm²

7 days

> 30 N/mm²

28 days

> 40 N/mm²

Application

Application Information

Mixing Ratio

3.30–3.50 L of clean water per 25 kg bag to suit desired consistency

Fresh mortar density

~2.0 kg/l

Layer Thickness

3–40 mm (vertical application)

Ambient Air Temperature

+5 °C min. / +40 °C max.

Substrate Temperature

+5 °C min. / +40 °C max.

Pot Life

+20 °C

30 minutes

+30 °C

25 minutes
Consumption

Yield

  • ~71 x 25 kg bag per m³
  • 1 bag yields ~14 L of mortar
Application steps

MIXING

Sika MonoTop® R-40 should be mechanically mixed in a clean container using a drill and paddle. A normal tilting drum concrete mixer is not suitable. Place 3.3–3.5 L of water into a clean drum and add Sika MonoTop® R-40 slowly while mixing. A minimum mixing time of 3 minutes is recommended to thoroughly blend the components with a maximum speed of 500 rpm to minimise air entrainment.

 

APPLICATION

Work wet-on-wet, the mixed mortar well into the substrate using a placing rather than a rendering technique to fill all pores and voids. Compact well. Force material against the edge of the repair, working towards the centre. For repairs in excess of 40 mm deep, apply in layers and form keys for the subsequent layers. If previous layers are over 48 hours old, needle gun the surface and dampen before applying the next layer. Steel trowel the final coat if required. Sika MonoTop® R-40 and surrounding areas can be further treated with SikaTop® Seal-107 or Sika MonoTop®-620 MY to provide a water and carbonation resistant finish.

CURING TREATMENT

To achieve the full potential of any cement based material, curing is essential. This can be carried out with the application of a curing compound such as Antisol®-E or with other curing practices such as covering with polythene sheets or damp hessian for 3 days.

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened or cured material can only be mechanically removed.

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