Sika® Icoment®-520

• The system is listed in the compilation of certified substances and substance systems according to ZTV-ING, Part 3, Section 4.
• Certified for use on Sika MonoTop®-600 by report no. P-5004/4353-MPA BS, also for use on Sika MonoTop®-PCC-System by report no. P-5103/438/13 –MPA BS; Materials Testing Institute for Building, Braunschweig Technical University (IBMB MPA TU Braunschweig).

1 year from date of production

Store in undamaged, unopened, original sealed packaging in cool and dry conditions. Keep away frost and protect from damp.

1.84 kg/l of fresh mortar

0.5 mm

ca. 40 N/mm²

ca. 10 N/mm²

Pull-off strength

~2 N/mm²

component A : component B : water = 16 : 84 : 8 by weight.
25 kg unit: 4 kg component A + 21 kg component B + max. 2 litres water.

Max. 3 mm per layer

Minimum +5 °C
Maximum +35 °C

Minimum +5 °C
Maximum +35 °C

The correct consistency for application is restored by simply stirring the Sika® Icoment®-520 within the above time limits and without adding more water.

~1.9 kg/m²/mm of mixed mortar. Equivalent to a material consumption of Sika® Icoment®-520, components A+B, of 1.76 kg/m²/mm.

Sika® Icoment®-520 is already supplied in the correctly packaged quantity ratio, only the required water still has to be added. The Component A (= liquid part) is stirred or shaken well. A mixing liquid is prepared by adding approx. 1.8 l water (approx. 90 % of the max. water). Component B (powder) is added to this liquid while mixing continuously. Mix powerfully and intensively with a mixer until an evenly homogeneous mixture is obtained.The powder component must be evenly wetted; dry, non-wetted powder residues should not remain. Adjustment for processing is made by adding the remaining amount of water in portions (this also washes out the dispersion container at the same time). This volume should not be exceeded under any conditions. A slight stiffening during the curing phase of the material will benefit during the application. Sika® Icoment®-520 must not be mixed with any additives.

Sika® Icoment®-520 is applied using plastering/rendering techniques, with trowels, floats, scrapers etc. on a pre-saturated, damp substrate. A simple method of pre-saturating and keeping moist for curing is to use a garden sprayer. Any larger or deep holes / voids should be pre-filled with the Sika® Icoment®-520 or another suitable Sika repair mortar and then levelled.
Two operations are generally advisable for the application of Sika® Icoment®-520:
1st operation: Levelling of the concrete substrate
2nd operation: Application of a uniform protective layer.
The maximum layer thickness per operation is 3 mm. Application in several layers is possible with careful dampening of each preceding substrate layer. Only finish the final layer to a smooth, dense surface.

If layer thicknesses over 3 mm need to be applied in one operation, the Sika® Icoment®-520 powder component must be pre-mixed with about 25 % by weight of quartz sand, preferably of granulometry 0.7-1.2 mm. Never apply layer thicknesses above 5 mm in one operation. Always use the Sika® Icoment®-520 as supplied for the final application.
As soon as the final layer begins to harden and stiffen evenly, a fine-grained finish similar to sandpaper should be produced with a suitable sponge or wood float.
No additional water must be added during this finishing process, if tools are cleaned with water during application, then this must be squeezed out or wiped off before re-using them on the surface.
For larger areas, Sika® Icoment®-520 can be wet spray applied without changing the mixing ratio, but care must be taken to prevent the material from overheating in the hopper or lines. Spray application is not possible with material temperatures ≥25 °C. Do not exceed the maximum layer thickness. Smooth and finish as usual. Mechanical spray application does not affect the stated technical data.

     
For spray application (up to max. 25 °C):
Wet spray equipment with screw pumps that have variable gearing are recommended; this is so that the delivery rate can be adjusted to suit the application and environmental conditions. Examples of suitable spray equipment include the Putzmeister texture spray machine, the PFT decorative plaster spray machine, and the Wagner injection wand, or other similar machines of the same type, with a 6 mm nozzle.
For optimum spray atomisation we recommend that the spray pumps should have an air compressor with an output of 2.5 m³/min., providing an oil and water free air supply.
Our application equipment recommendations are based on tests with the stated machines. As these machines are not manufactured and sold by Sika and may be differently configured and/or equipped and/or modified, these recommendations cannot replace the user's own research and testing to confirm their suitability before application. Sika cannot accept any liability for any unsuccessful use of the machines.

Sika® Icoment®-520 leveling filler hardens more slowly than normal cement mortar. Rapid drying, e.g. due to sun or strong air movement, must be prevented, therefore the rules for curing mortars must be followed.
Protect freshly prepared surfaces by covering them with mats or plastic sheets. Better: Spray fully with water several times a day. Curing must be done for at least 3-4 days, to achieve optimum surface strength.
Sika® Icoment®-520 leveling filler must be overcoated with coating materials suitable for alkaline substrates: Sikagard®-680 S Betoncolor, Sikagard®-675 W ElastoColor, Sikagard®-555 W Elastic, Sikagard® Wallcoat T or Sikagard®-260 WPU. According to DIN EN 1504-3, Sika® Icoment®-520 must not be used without carbonation protection.

When building up a surface protection system according to DIN EN 1504-2, the curing times must be observed according to the test certificate. 

Fresh mortar on tools and equipment can be cleaned with water. Hardened mortar can only be removed mechanically.