Product Data Sheet Safety Data Sheet Show all documents

Sika MonoTop®-620

R3 PORE SEALER AND LEVELLING MORTAR/SMOOTHING COAT

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
  • Compatible with Sika® FerroGard® corrosion inhibitor
  • Does not require a bonding primer even when manually applied
  • Suitable for hand and machine application
  • Low shrinkage behavior
  • Non-corrosive
  • A1 fire rating
Product Data Sheet Safety Data Sheet Show all documents

Usage

Sika MonoTop®-620 can be applied with or withour a reinforcement matt, over concrete or mortar surfaces or over 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 honeycombedconcrete)
  • Restoration of edges and joints
  • Suitable for restoration work (Principle 3, method 3.1and 3.3 of EN 1504-9)
 

Advantages

  • Easy to apply
  • Class R3 of EN 1504-3
  • Adjustable consistency to improve workability
  • Compatible with Sika® FerroGard® corrosion inhibitor
  • Does not require a bonding primer even when manually applied
  • Suitable for hand and machine application
  • Low shrinkage behavior
  • Non-corrosive
  • A1 fire rating

Packaging

25 KG

Colour

Grey powder

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Conforms to the requirements of BS EN 1504-3 R3 Classification
Product Information

Chemical Base

Portland cement, polymer redispersable powder, selected aggregates and
additives.

Shelf Life

6 months from date of production

Storage Conditions

store properly in original unopened, sealed and undamaged packaging in dry and cool conditions.

Density

Mixed wet 2.0 kg/litre
System information

System Structure

Sika® MonoTop-620 is part of the Sika® MonoTop Concrete Repair System:

  • Sika® MonoTop-610: Bonding primer and reinforcement coating
  • Sika® MonoTop-612: Hand and wet spray applied repair mortar
  • Sika® MonoTop-412N: Hand and wet spray applied repair mortar
  • Sika® MonoTop-615: Hand and wet spray high build applied repair mortar
  • Sika® MonoTop-620: Smoothing coat
  • Sika® FerroGard®-903: Corrosion inhibitor
Technical Information

Compressive Strength

~30-35 N/mm2

(EN 12190)

Modulus of Elasticity in Compression

~15.4 kN/mm2

(EN 13412)

Tensile Strength

~4-6 N/mm2

(EN 196-1)

Tensile Adhesion Strength

~ 1.5-2.5 N/mm2

(EN 1542)

Application

Application Information

Mixing Ratio

  • Wet Spray Application : 2.5 to 3.5 L of water for 25kg powder
  • Hand Application: ~ 4.0 to 4.5 L of water for 25 kg powder

Layer Thickness

1.5 mm min. / 5.0 mm max.

Ambient Air Temperature

+5°C min. / +30°C max.

Substrate Temperature

+5°C min. / +30°C max.
Consumption

Consumption

This depends on the substrate roughness and thickness of layer applied. As a guide, ~ 2.0 kg/m2/mm.
Application steps

MIXING

Sika® MonoTop-620 can be mixed with a slow speed (< 500 rpm) electric drill mixer.


Pour the water in the correct proportion into a suitable mixing container. While stirring slowly, add the powder to the water. Mix thoroughly for at least 3 minutes to the required consistency.

APPLICATION

Smoothing Coat/Levelling Mortar
The surface should be pre-wetted to a saturated surface dry condition before application. Pre-fill surface defects before applying as a smoothing coat. Apply Sika MonoTop®-620 by spatula or trowel to the required thickness and finish. Where Sika MonoTop®-620 is to be overcoated, finishing with a moist neoprene sponge or brush after initial set has taken place is recommended to provide a key for the coating. Do not overwork Sika MonoTop®-620 during or after applying. Should Sika MonoTop®-620 mortar be wetted during the initial cure period a white ‘bloom’ may be produced on the surface. This however, does not affect the long term properties of the mortar.

 

Pore filler:
Tightly trowel over surface and force into pores and other surface defects. Before overcoating remove excess material from surface while wet and wash down if necessary when dry to remove any dust deposits which may affect the bond of subsequent coatings.

CURING TREATMENT

It is essential to cure the repair mortar immediately after application for a minimum of 3 days to ensure full cement hydration and to minimise cracking. Use polythene sheeting taped down at the edges or other approved method. Curing compounds shall not be used if smoothing coat is to be overcoated.

CLEANING OF TOOLS

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

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