Description
Sika® MonoTop-612 N is a cement-based, one component low permeability concrete repair mortar, containing silica fume and polymer, meeting the requirements of Class R4 of EN 1504-3.
USES
▪ For repairing high strength concrete >45MPa
▪ High Build repairs horizontal, vertical and overhead
▪ For exterior and interior use
▪ New and old concrete repairs
▪ Marine repairs
▪ Trafficable repair applications
CHARACTERISTICS AND ADVANTAGES
- Compatible with Sika® FerroGard® corrosion inhibitors
- Compatible with Sika® FerroGard® Sacrificial Anode System
- High build up to 100mm in one application*
- Low shrinkage
- High workability
- Very high resistivity mortar for durable new work concrete repairs
- AS/AZS 4020:2018 Approved for Potable/ drinking water contact
- Sulphate resistant in marine
COLOUR
Grey Powder
PACKAGING
20 kg bag
MIXING
Sika MonoTop®-612 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 quantity, Sika MonoTop®-612 N can also be manually mixed. 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. All small amount of Sika MonoTop®-612 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 in saturated surface dry (SSD) condition 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 above for compatible Sika products and refer to the relevant Product Data Sheet for more detailed information about the reinforcement corrosion product. Sika MonoTop®-612 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 maintain in SSD condition. 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.
CURING TREATMENT
Protect the fresh mortar immediately from premature drying using an appropriate curing method e.g. curing compound, moist geotextile membrane, polythene sheet etc.
MonoTop 612 NFG Sika Data Sheets
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Sika MonoTop®-612 NFG – Sika’s Website
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