Sika® Icosit® KC 350/45

Two-part polyurethane

12 months from date of production

The Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +25 °C. Always refer to the packaging.

Refer to the current Safety Data Sheet for information on safe handling and storage.

Product:

• Sika® Icosit® KC 350/45. 

Primers:

• Sikadur®-32+ for steel surfaces and matt damp or dry green concrete. 

• Sikadur®-53 for steel surfaces and matt damp or dry green concrete. 

• Sika® Primer-115 for dry and matt damp mature (>14 day old) concrete. 

Contact Sika® Technical Services for specific information.

Load deflection diagram

Condition Product Parts at +15 °C before application to assist with flow and curing speed. 

90 % maximum

Dry to matt damp

15 minutes at +20 °C

After this time, the mixture becomes unuseable for application.

Higher temperatures will shorten pot life.

SHORE A VALUE AT THE FOLLOWING CURING TEMPERATURES AND TIMES:

Waiting time for applying the Product on primer or coating at +20 °C:

0.9 kg/L

GREEN CONCRETE, MINIMUM 1 DAY OLD

Preconditions

The designed concrete class according to BS EN 206:2013+A2:2021 must be at least C30/37.

The water / cement ratio of the designed concrete must be ≤ 0.50.

The concrete surface must NOT have a shiny layer of water on top, but may be locally dry or matt damp substrate.

The substrate must be solid, rough and clean: the concrete surface should be free from loose particles, dust, cement laitance, oil stains, grease and other contaminants.

1. In order to remove cement laitance from the concrete surface, brush the surface with stiff bristle brushes. The brushing process should begin as early as possible (when is possible to step onto the surface of the hardening concrete), usually about 6 to 8 hours after mixing the concrete mixture.
2. Remove any standing water by vacuum extraction or oil-free compressed air. A matt damp substrate is acceptable.
3. Apply Sikadur®-32+ with a consumption of approximately 0.75 kg/m² or apply Sikadur®-53 with a consumption of approximately 0.80 kg/m².
4. Immediately broadcast the freshly coated surfaces with quartz sand 0.4 – 0.7 mm with a consumption of approximately 2 kg/m².
5. Apply the Product after a waiting time of minimum 24 hours to maximum 7 days, to a layer thickness of 15 to 60 mm.

MATURE CONCRETE, MINIMUM 14 DAYS OLD

Preconditions

The pull-off strength of the concrete substrate must be at least 1.5 MPa.

It must have no visible traces of moisture and no darkening caused by moisture.

The substrate must be solid, rough and clean: the concrete surface should be free from loose particles, dust, cement laitance, oil stains, grease and other contaminants.

1. Prepare the concrete substrate mechanically using suitable abrasive blast cleaning or planing / scarifying equipment to remove cement laitance and achieve an open-textured gripping surface.
2. Remove high spots by grinding.
3. Completely remove all dust, loose and friable material from all surfaces, preferably by using vacuum extraction equipment.
4. Apply Sika® Primer-115 with a consumption of approximately 0.2 kg/m².
5. Immediately broadcast the freshly coated surfaces with quartz sand 0.4 – 0.7 mm with a consumption of approximately 2 kg/m².
6. Apply the Product after a waiting time of minimum 0.5 hours to maximum 3 days to a layer thickness of 15 to 60 mm.

STEEL

1. Prepare steel substrates mechanically using suitable abrasive blast cleaning to remove all corrosion and to achieve a bright metal finish.
2. Completely remove all dust, loose and friable material from all surfaces, preferably by using vacuum extraction equipment.
3. Apply Sikadur®-32+ with a consumption of approximately 0.75 kg/m² or apply Sikadur®-53 with a consumption of approximately 0.80 kg/m².
4. Immediately broadcast the freshly coated surfaces with quartz sand 0.4 – 0.7 mm with a consumption of approximately 2 kg/m².
5. Apply the Product after a waiting time of minimum 24 hours to maximum 7 days to a layer thickness of 15 to 60 mm.

The Product is supplied in pre-weighed composite units consisting of Parts A+B.

Do NOT add any solvents to the Product.

SMALL PACKAGING UNITS

1. Use an electric or pneumatic mixer with spiral or basket stirrer, diameter 140 mm, speed 600 to 800 rpm.
2. Stir Part A thoroughly until the material is completely homogeneous for at least 30 seconds in the original container.
3. Add Part B and mix for a further 120 to 140 seconds. NOTE: Ensure the material from the container walls and the base is also mixed in.
4. During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight-edge trowel at least once to ensure complete mixing.

BIG PACKAGING UNITS

• Large volumes of the Product can be mixed and applied with special two-part casting machines, which both mix and pump the material.

• Large volumes of the Product can also be mixed using geared mixers, and application is performed separately.

  A suitable geared mixer is the GRS 300/1,5 from Geppert Rührtechnik GmbH, equipped with three blades Ø 300 mm. Refer to the equipment supplier’s instruction manual.

  Mount the agitator shaft on a drum lid which replaces the original lid during stirring. Stir Part A thoroughly, then add Part B and stir for approximately 5 minutes.

Contact Sika® Technical Services for information about suitable mixing machines.

To achieve the optimum flow performance, condition the material to a temperature of +15 °C before application.

The Product is suitable for application with special two-part casting machines, which both mix and pump the material. In this case, Part A must be stirred at regular intervals. Refer to the equipment supplier’s instruction manual.

Sweep excess grout into appropriate containers for disposal before it has hardened. Dispose of in accordance with applicable local regulations.

Clean all tools and application equipment with Sika® Thinner C at regular intervals and immediately after use. Hardened material can only be removed mechanically.