Product Data Sheet Show all documents

Sika MonoTop®-620

R3 pore sealer and levelling mortar

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
Product Data Sheet Show all documents

Usage

Sika MonoTop®-620 can be applied with or without 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

Product Information

Chemical Base

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 information

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 seriesConcrete repair mortars
Levelling Mortar
Sika Monotop®-620Normal use
Technical Information

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

Application Information

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

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
Application steps

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 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.

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