Sika MonoTop® R

6 months from the date of production

Store properly in original, unopened and undamaged sealed packaging in dry conditions. Keep away from direct sunlight.

Freshly mixed mortar ~2.0 kg/l

Sika MonoTop® System comprises:

• Sika MonoTop®-910 N bonding bridge and reinforcement protection
• Sika MonoTop®-615 SD or Sika MonoTop® R hand and wet spray applied repair mortar
• Sika MonoTop®-620 MY pore sealer / fairing coat

Hand application
Approximately 3.4–3.5 litres of clean water per 25 kg bag as per required consistency.
Wet spray application
3.4–4.5 litres of clean water per 25 kg bag.

20 mm max. (vertical application) / 3 mm min.

+6 °C min. / +40 °C max.

+6 °C min. / +40 °C max.

~20 minutes (+30 °C)

• ~71 bags per m³
• 1 bag yields ~14 L of mortar

Sika MonoTop® R should be mechanically mixed in a clean drum using a drill and paddle. A normal concrete mixer is not suitable. Pour the mixing water into a clean drum. While stirring slowly, add Sika MonoTop® R to the water. Mix for a minimum 3 minutes to ensure that the components are thoroughly blended and at a maximum speed of 500 rpm to minimise air entrainment. Mix only what you require taking into consideration the pot life of the material.

Hand 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 20 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.

The Sika MonoTop® R and surrounding areas can be further treated with SikaTop® Seal-107 (MY) or Sika MonoTop®-620 MY to provide a water and carbonation resistant finish.

Sprayed application

The repair mortar shall be placed onto the pre-wetted substrate between the minimum and maximum layer thicknesses without the formation of voids and loose rebound material. Where layers are to be built up to prevent sagging or slumping, each layer should be allowed to stiffen before applying subsequent layers “wet on wet”. When layers cannot be applied “wet on wet”, or if more than 24 hours between layers, apply a bonding primer of Sika® MonoTop-910 N or SikaTop® Armatec-110 EpoCem® and apply repair mortar “wet on wet”.

Finishing for both hand and spray applications should be done to the required surface texture as soon as the mortar has started to stiffen.

To achieve the full potential of any cement based products, 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.

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