Application of polyurethane coatings
Polyurethane coating
The install of polymer floors
Polyurethane floors
Real Project
Project
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Ukraine, Kyiv region.
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Shopping room.
- Base: concrete floor.
A task
For a retail space in a construction hypermarket, it is required to apply a wear-resistant and decorative polymer coating.
Solution
The customer decided to apply the TM Henkel Ceresit CF 72 polyurethane coating system, 2 mm thick.
Stages of work
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Mechanical preparation of the base, using grinding equipment.
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Surface dusting.
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Applying a primer.
- Application of a base layer with a thickness of 2 mm.
Advantages of Ceresit CF 72 polyurethane coating
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Ceresit CF 72 is a polyurethane, self-levelling industrial floor coating.
- Two-component self-levelling mortar, based on hard-elastic polyurethane resins, free of volatile solvents, for the installation of colored polymer floor coverings for concrete.
Polymer floors for the trading floor
Properties of polyurethane flooring Ceresit CF 72
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Hard-elastic coating, with high resistance to compressive and tensile loads.
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Resistant to high abrasion loads, including during traffic on rubber tires.
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The ability to bridge cracks in the base, up to 0.9 mm wide.
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Polyurethane coating, forms a smooth surface, spreads well.
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Perhaps the device, both smooth and non-slip, rough surface, after sprinkling burnt sand.
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It does not contain volatile organic solvents, has no unpleasant odor, is technologically advanced and easy to use.
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Polyurethane coating impervious to liquids.
- Polyurethane floor covering with high mechanical and chemical resistance.
Polyurethane floors
Scope of bulk polyurethane coating
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Indoors with normal and high humidity.
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As a smooth, crack-bridging coating for industrial floors in production and storage areas, offices, etc.
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As a rough coating (covered with quartz sand) with increased resistance to cracking for loading and unloading areas, parking lots, industrial premises of the food industry and agriculture.
- As a repair mortar for flooring.
Application of polyurethane coating
Foundation preparation
Substrate preparation is carried out in accordance with DSTU-N B A.3.1-23:2013, DSTU-N B V.2.6-212:2016 and
DSTU ISO 8504.
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The base surface must be clean, solid and even.
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All weak areas must be removed, cracks and cavities repaired with Ceresit materials.
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It is necessary to clean the surface from dirt, dust, grease and other contaminants that may interfere with the adhesion of the material to the substrate.
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Mechanical, sandblasting or shotblasting of a surface is recommended.
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Permissible surface cleaning by hand or power tool.
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After surface preparation, the compressive strength of the concrete base should not be lower than 20 MPa, and the residual moisture content should not be more than 4%.
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Ceresit CF 72 is applied to the prepared and previously prepared substrate.
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As a primer, Ceresit CF 71 is used.
- The use of primers during surface preparation is mandatory.
Application of polymer floors
Execution of work on the application of polyurethane coating 2 mm
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Before mixing, component A is mixed in a separate container, using a low-speed (up to 400 rpm) mixer, with a spiral nozzle, until a uniform color is obtained.
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To prepare the working mixture, the contents of the container with component B are completely poured into the container with component A and mixed with a low-speed mixer, with a spiral nozzle, until a homogeneous and homogeneous mixture is obtained.
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When mixing component A and preparing the working mixture, avoid excessive air intake and ensure that the spiral nozzle is completely immersed in the mixture.
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The primed surface of the base must have the appearance of wet concrete, without whitish or matte spots, and have a clearly visible homogeneous polymer film.
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The prepared working mixture is poured from a bucket onto a primed base and evenly distributed on the surface with a notched trowel or aluminum squeegee, with a set gap to obtain a coating layer of the required thickness.
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Cover device should start from the wall opposite to the exit.
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10–15 minutes after spreading, the working mixture layer must be processed along and across with a spiked deaeration roller to remove air bubbles and finally level the coating layer.
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To move on a fresh polymer coating, use special shoes (with spikes on the sole).
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To obtain a non-slip, rough coating, after passing with a spiked roller, on a freshly laid layer of polyurethane coating, the surface is backfilled with cleaned dry quartz sand, fraction 0–0.63 mm, with a consumption of 0.6–1 kg/m2, with a uniform division by surfaces.
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If necessary, quartz sand can be added to the pre-mixed mixture, with constant stirring and control of the homogeneity and absence of separation of the mixture.
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After sanding, walking on the surface of the laid coating is prohibited.
- The process of powdering and joining the coating fragments, in case of application over large areas, must be completed within 15 minutes at a temperature of +23 °C after the preparation of the mixture.
Ceresit CF 72
Technical description Ceresit CF 72
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Self-levelling polyurethane coating for industrial floors.
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Two-component self-levelling compound based on hard-elastic polyurethane resins, free of volatile solvents.
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For the device of color polymeric floor coverings.
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After the device of a polymeric covering, it needs to be protected from influence of the sun, wind, draft.
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Water for at least 24 hours at +23°C.
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If it is necessary to apply a second coating layer, the interlayer time interval should not exceed 48 hours at a temperature of +23 °C.
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The application of the second layer can be carried out after the first one has cured, in the absence of sticking, approximately 5 hours after its application at a temperature of +23 °C.
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The minimum and maximum interlayer intervals directly depend on the air humidity temperature at the facility.
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In case of going beyond the maximum interlayer interval, mechanical processing (grinding) of the initial layer is required.
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Important! The prepared mixture must be used within 20 minutes at a temperature of +20 °C.
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The temperature of the base and components A and B, during the work, must be in the range from +15 °C to +30 °C. Avoid condensation!
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The temperature of the substrate must be 3°C above the dew point to prevent condensation or discolouration of the surface.
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Humidity should not exceed 75%.
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The color of the coating is coordinated according to the RAL catalog.
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Remains of uncured material and spilled material can be cleaned with a cloth, washed with an organic solvent.
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Cured material can only be removed mechanically.
- The exact material consumption is determined directly at the facility. It is necessary to strictly observe the proportion when mixing the components.
Note
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Ceresit CF 72 is a polyurethane-based polymer material.
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Protect eyes and skin, wash hands thoroughly after finishing work, provide ventilation in the room.
- In case of contact with eyes, rinse with water and seek medical advice.
Storage
In branded sealed packaging in dry conditions at temperatures from +5 °С to +30 °С - no more than 12 months from the production date indicated on the package.
Disposal
Dispose of product residues and empty containers as construction waste.
Package
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Ceresit CF 72 is supplied in sets of 13.22 kg.
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Component A: 10 l plastic bucket weighing 10.5 kg.
- Component: plastic bucket with a volume of 3 liters, weighing 2.72 kg.
Specifications
Compound |
|
Component A |
Pigmented polyurethane resin
|
Component B |
Hardener
|
Mass ratio of parts |
|
Component A |
10.5 kg
|
Component B |
2.72 kg
|
Coating appearance |
Glossy uniform surface in specified color (RAL) |
Density at +20 °C:
|
1.5 g/cm3
|
Component A |
1.5-1.6 g/cm3
|
Component B |
1.2 g/cm3
|
Time of use of the working mixture at +20 ° С |
20 minutes |
Mass fraction of non-volatile substances in the mixture |
99.8%
|
Recommended coating thickness |
1.5–2.5 mm.
|
Adhesion:
|
|
To metal |
8 MPa
|
To concrete |
not less than 2 MPa
|
Mixture consumption |
2–3.5 kg/m2
|
Curing time at +20 °C
|
|
Before sticking |
5 o'clock
|
To the action of light transport loads |
72 hours
|
Fully resistant to mechanical and chemical loads |
7 nights |
Shore D hardness (after 28 days) |
65
|
Relative elongation after rupture |
15–20%
|
Erasing after Taber (after 28 days) |
88 m2
|