Sika MonoTop®-723 N
Sika MonoTop®-723 N is a polymer modified surfacing/finishing mortar, ready to mix, meeting the requirement of class R3 of EN 1504-3.
- Easy to apply and excellent finishing
- Suitable for hand or wet spray application
- Can be applied up to 5 mm thick per application layer
- Class R3 of EN 1504-3
- Restoration work
- Sulphate resistant
- Low cracking sensitivity
- Very good resistance to water and chloride penetration
- Compatible with Sikagard® overcoat systems
- A1 fire rating
Usage
- Thin layer render
- Use as a concrete pore sealer / levelling mortar
- Repairing of minor defects (pores and honeycombed concrete)
- Suitable for restoration work (Principle 3, method 3.1 and 3.3 of EN 1504-9)
- Suitable for preserving or restoring passivity (principle 7, method 7.1 and 7.2 of EN 1504-9)
Advantages
- Easy to apply and excellent finishing
- Suitable for hand or wet spray application
- Can be applied up to 5 mm thick per application layer
- Class R3 of EN 1504-3
- Restoration work
- Sulphate resistant
- Low cracking sensitivity
- Very good resistance to water and chloride penetration
- Compatible with Sikagard® overcoat systems
- A1 fire rating
Packaging
20 kg bag
Colour
Grey powder
Product Details
Chemical Base
Portland cement, selected aggregates, additives and polymer modified
Shelf Life
12 months
Storage Conditions
Store properly in undamaged original sealed packaging, in dry cool conditions.
Density
Fresh density of mortar ~2.0 kg/l
Maximum Grain Size
dmax: 0.4 mm
System Structure
Sika MonoTop®-723 N is part of the range of Sika mortars complying with the relevant part of European Standard EN 1504 and comprising of:
Bonding Primer / Reinforcement Corrosion Protection | |
Sika MonoTop®-910 N | Normal Use |
SikaTop® Armatec® 110 EpoCem® | Demanding requirements |
Repair Mortar | |
Sika MonoTop®-412, 352 | Concrete repair mortars |
Levelling Mortar | |
Sika MonoTop®-723 N | Normal use |
Compressive Strength
Class R3
~40 MPa after 28 days | (EN 12190) |
Modulus of Elasticity in Compression
≥ 15 GPa | (EN 13412) |
Tensile Adhesion Strength
≥ 1.5 MPa | (EN 1542) |
Thermal Compatibility
≥ 1.5 MPa (Part 1: Freeze- thaw) | (EN 13687-1) |
Coefficient of Thermal Expansion
~10.5 x 10-6 1/K | (EN 1770) |
Reaction to Fire
Euro Class A1 | (EN 1504-3) |
Diffusion Resistance to Water Vapour
~120 μH2O
Capillary Absorption
≤ 0.5 kg/(m2 h0.5) | (EN 13057) |
Permeability to Carbon Dioxide
~2 700 μCO2
Carbonation Resistance
dk ≤ control concrete (MC(0.45)) | (EN 13295) |
Application
Mixing Ratio
~ 3.6 litres of water for 20 kg powder
Layer Thickness
min. 1 mm / max. 5 mm
Ambient Air Temperature
+5°C minimum; +35°C maximum
Substrate Temperature
+5°C minimum; +35°C maximum
Pot Life
~40 minutes at 20°C
Waiting Time / Overcoating
As a guide, depending on weather conditions overcoat 4 days after application (3 days curing + 1 day drying) with Sikagard® range of protective coatings. For other emulsion paints, refer to the relevant manufacturer’s data sheet/ documentation.
Consumption
This depends on the substrate roughness and thickness of layer applied. As a guide, ~ 1.7 kg of powder per m² per mm thick
Yield
20 kg yields approximately 11.7 litres of mortar when mixed with 3.6 litres water
MIXING
Sika MonoTop®-723 N can be mixed with a low speed (<500 rpm) hand drill mixer or for machine application, using a force action mixer 2 to 3 bags or more at once depending the type and size of mixer. Pour the recommended water in a suitable mixing container. While stirring slowly, add the powder to the water and mix thoroughly at least for 3 minutes to the required consistency.
APPLICATION
Sika MonoTop®-723 N can be applied either manually using traditional techniques or mechanically using wet spray equipment. Thoroughly pre-wet the prepared substrate a recommended 2 hours before application. Keep the surface wet and do not allow to dry. Before application remove excess water e.g. with a clean sponge. The surface shall appear a dark matt appearance without glistening and surface pores and pits shall not contain water.
When manually applying the mortar first make a scratch coat by firmly scrapping the repair mortar over the substrate surface to form a thin layer and fill any pores or pits in the surface. The surface can be finished according to the requirements using a float or with a relevant wooden or plastic float or damp sponge.
CURING TREATMENT
Protect the fresh mortar immediately from premature drying using an appropriate curing method e.g. moist geotextile membrane, polythene sheet etc.
CLEANING OF TOOLS
Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.