Sika MonoTop®-620
Sika MonoTop®-620 is a polymer modified surfacing/ finishing structural repair mortar, ready to mix, meeting the requirements of class R3 of the EN 1504-3.
- Easy to apply
- Class R3 of EN 1504-3
- Adjustable consistency to improve workability
- Does not require a bonding primer even when manually applied
- Suitable for hand and machine application
- Low shrinkage behavior
- Non-corrosive
- A1 fire rating for the grey type
Usage
Sika MonoTop®-620 can be applied with or withour a reinforcement matt, over concrete or mortar surfaces or over SikaTop® or Sika Monotop® mortars. It is suitable for the following uses:- Use as a concrete/ mortar pore sealler or levelling mortar
- Thin layer render over vertical or horizontal structural elements
- Repairing of minor defects (pores and honeycombed concrete)
- Restoration of edges and joints
- Suitable for restoration work (Principle 3, method 3.1 and 3.3 of EN 1504-9)
Advantages
- Easy to apply
- Class R3 of EN 1504-3
- Adjustable consistency to improve workability
- Does not require a bonding primer even when manually applied
- Suitable for hand and machine application
- Low shrinkage behavior
- Non-corrosive
- A1 fire rating for the grey type
Packaging
25 kg bags
Colour
Light grey powder
Product Details
APPROVALS / CERTIFICATES
Insert local test reports
Composition
Cement, selected aggregates, silica fume and synthetic resins
Shelf life
12 months
Storage conditions
Store properly in undamaged original sealed packaging, in dry cool conditions
Density
Fresh density of mortar ~2.2 kg/l (at 20 °C)
Maximum grain size
Dmax: 0.7 mm
Soluble chloride ion content
< 0.01 % | (EN 1015-17) |
System structure
Sika MonoTop®-620 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 S | Normal Use |
SikaTop® Armatec® 110 EpoCem® | Demanding Requirements |
| Repair Mortar | |
| Sika Monotop®- 412, 352, 211 series | Concrete repair mortars |
| Levelling Mortar | |
| Sika Monotop®- 620 | Normal use |
Compressive strength
| ~43 MPa | (EN 12190) |
Modulus of elasticity in compression
| ~22 GPa | (EN 13412) |
Tensile strength in flexure
| ~8 MPa (28 days) | (EN 196-1) |
Restrained shrinkage / expansion
Restrained Shrinkage | ~2.0 MPa |
Restrained Expansion | ~2.0 MPa |
Tensile adhesion strength
| ~2 MPa | (EN 1542) |
Reaction to fire
| Euro Class A1 | Declared |
Capillary absorption
| ~0.4 kg.m-2.h-0.5 | (EN 13057) |
Carbonation resistance
| dk= 3.7 mm | (EN 13295) |
Application
Mixing ratio
~4.0 litres of water for 25 kg bags; 100:16 (powder: water)
Layer thickness
min. 1.5 mm/ max. 5.0 mm
Ambient air temperature
+5 °C minimum; +30 °C maximum
Substrate temperature
+5 °C minimum; +30 °C maximum
Pot Life
~30- 45 minutes at +20 °C
Consumption
This depends on the substrate roughness and thickness of layer applied. As a guide, ~17.4 kg of powder per m2 per cm thick
Yield
25 kg of powder yields approximately 14.5 litres of mortar
MIXING
Sika MonoTop®-620 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
Bonding Primer:
On a well prepared and roughened substrate a bonding primer is generally not required for this product. When a bonding primer is required, refer to the System Information above for compatible Sika products and refer to the relevant Product Data Sheet for instructions.
Sika MonoTop®-620 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 appropiate curing method e.g. moist geotextile membrane, polythene sheet, etc.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with water immediately after use. Hardened material can only be mechanically removed.