Sika MonoTop 412N
Sika MonoTop 412N

Sika MonoTop 412N

Sika MonoTop 412N is a 1-component, fibre reinforced, low shrinkage repair mortar meeting the requirement of class-R4 of EN 1504-3.Sika MonoTop 412N suitable for restoration work (Principle 3, method 3.1 & 3.3 of EN 1504-9) as well as the repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works.It is also suitable for structural strengthening, increasing the bearing capacity of the concrete structure by adding mortar.

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This item is processed by XOL
Brand: Sika
Vendor: XOL MALTA

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JCR Imports Ltd
Mriehel
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€37.21 VAT included
Mriehel

Description

Features & Benefits

  • One-component, fibre reinforced, low shrinkage repair mortar.
  • Suitable for restoration work.
  • Repair of spalling and damaged concrete in buildings, bridges, infrastructure and superstructure works.
  • Sulphate resistant.
  • For hand or machine application.
  • Easy to apply.
  • Application up to 50 mm in 1 layer.
  • Very low shrinkage behaviour.
  • Does not require a bonding primer even when manually applied.
  • Low permeability.
  • A1 fire rating.
  • Galvashield compatible.

 

Product Information

Shelf Life: 12 months.

Storage Conditions: Store properly in undamaged original sealed packaging, in dry cool conditions.

Chemical Base: Sulphate resistant cement, selected aggregates and additives.

Consumption: This depends on the substrate roughness and thickness of layer applied. As a guide, ~ 1.9 kg of powder per mm thick per m².

Pot Life: ~40 minutes at +20°C.

 

Substrate Preparation

Concrete

  • The concrete shall be thoroughly clean, free from dust, loose material, surface contamination and materials which reduce bond or prevent suction or wetting by repair materials.
  • De-laminated, weak, damaged and deteriorated concrete and where necessary sound concrete shall be removed by suitable means.

Steel reinforcement

  • Rust, scale, mortar, concrete, dust and other loose and deleterious material which reduces bond or contributes to corrosion shall be removed.
  • Surfaces shall be prepared using abrasive blast cleaning techniques or high pressure water-blasting to SA 2 (ISO 8501-1) Reference shall be made to EN1504-10 for specific requirements.

Mixing

  • Sika MonoTop®-412 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.
  • In small quantities, Sika MonoTop®-412 N can also be manually mixed.
  • Pour the recommended water in a suitable, clean mixing container. While stirring slowly, add the powder to the water and mix thoroughly for at least 3 minutes, adding additional water during the mixing time if necessary to the maximum specified amount and adjust 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 below for compatible Sika products and refer to the relevant Product Data Sheet for instructions.
  • A small amount of Sika MonoTop®-412 N can also be mixed slightly wetter than normal and used as a scratch coat to promote adhesion of the repair mortar to the substrate.
  • Any bonding primer shall be applied on a pre-wet substrate and subsequent application of the repair mortar shall be applied wet on wet with the bonding primer.

Reinforcement Corrosion Protection

  • Where a reinforcement coating is required the application of a repair mortar shall be applied wet on dry with the reinforcement corrosion protection.
  • Refer to the System Information below for compatible Sika products and refer to the relevant Product Data Sheet for more detailed information about the reinforcement corrosion product.
  • Sika MonoTop®-412 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 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.
  • Ensure the whole surface to be repaired is covered by the scratch coat.
  • Build up layers from bottom to top by pressing mortar well into the repair area.
  • The surface can be finished according to the requirements using a float while wet or with a relevant rough-cast tool as soon as the mortar has started to stiffen.

Cleaning Of Tools

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

 

Limitations

  • Refer to recommendations provided in BS EN 1504- 10.
  • Avoid application in direct sun and/or strong wind and/or rain.
  • Do not add water over recommended dosage.
  • Apply only to sound, prepared substrates.
  • Do not add additional water during the surface finishing as this will cause discoloration and cracking.
  • Protect freshly applied material from freezing.

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