Sikafloor® TC 442 W
(former MasterTop® TC 442W)
Waterborne two-component polyurethane topcoat
Sikafloor® TC 442 W is water borne, non-solvented, low emission, clear or pigmented 2K-PU topcoat which cures to a matt finish.
- Matt finish.
- NMP, APEO, VOC, glycol- and solvent-free.
- Very low emission (according AgBB).
- Abrasion resistant.
- Improves scratch and wear resistance.
- UV- stable.
- Good adhesion to non-porous substrates.
- Low viscosity.
- Easy to clean and maintain.
Usage
Sikafloor® TC 442 W is designed as a wear-resistant clear or pigmented topcoat on semi-rigid polyurethane systems.Advantages
- Matt finish.
- NMP, APEO, VOC, glycol- and solvent-free.
- Very low emission (according AgBB).
- Abrasion resistant.
- Improves scratch and wear resistance.
- UV- stable.
- Good adhesion to non-porous substrates.
- Low viscosity.
- Easy to clean and maintain.
Packaging
Part A | 8.0 kg/pail |
Part B | 2.0kg/pail |
Part A + B | 10.0kg/set |
Colour
Part A | Liquid. Coloured or milky white. |
Part B | Liquid. Colourless or light yellow. |
Sikafloor® TC 442 W is available in a range of colours, please contact your Sika Representative for more information.
Product Details
APPROVALS / STANDARDS
-
CE marking and declaration of performance based on EN 13813:2002 Screed material and floor screeds — Screed material — Properties and requirements — Synthetic resin screed material.
-
Meets the requirements of GB/T 22374-2018.
Chemical Base
Polyurethane
Shelf Life
12 months
Storage Conditions
Store in original containers, under dry conditions and a temperature between 15 to 25°C. Do not expose to direct sunlight. Protect from frost. Maximum shelf life achieved under these conditions.
Density
Part A | ~1.05 kg/L (transparent) ~1.14 kg/L (coloured) |
Part B | ~1.13 kg/L |
Mix | ~1.07 kg/L (transparent) ~1.14 kg/L (coloured) |
All density values are at +23°C.
Solid content by mass
43% (clear)
47% (coloured)
Volatile organic compound (VOC) content
< 120g/L | GB/T 22374-2018 |
Abrasion Resistance
<0.05g | GB/T 22374-2018 |
Resistance to Impact
Heavy load (1000g steel ball)
Tensile adhesion strength
>2.0MPa
Skid / Slip Resistance
>0.50
Chemical Resistance
Resistant to many chemicals. Please ask for a detailed chemical resistance table.
Application
Mixing Ratio
Part A : Part B = 80:20 (by weight)
Ambient Air Temperature
+10 °C minimum / +30 °C maximum
Relative Air Humidity
30% r.h. minimum / 90% r.h. maximum
Dew Point
Beware of condensation! The substrate and uncured floor must be at least 3 °C above dew point to reduce the risk of condensation or blooming on the floor finish.
Substrate Temperature
+10 °C min. / +30 °C max.
Pot Life
Temperature | Time |
+20 °C | 30 minutes |
Curing Time
Temperature | Time |
Fully cured at +23 °C | 5 days |
Waiting Time / Overcoating
Temperature | Time |
+20 °C | 12 hours minimum / 24 hours maximum |
Applied Product Ready for Use
Light Pedestrian Traffic | Time |
12°C / 50% r.h. | 24 hours |
20°C / 50% r.h. | 18 hours |
30°C / 50% r.h. | 12 hours |
Consumption
Matt, light structure system:
Product | Consumption | |
Substrates | Semi-rigid polyurethane systems and epoxy systems | - |
Seal Coat | 1 x Sikafloor®-TC 442 W | 0.12 – 0.15 kg/m² (transparent) 0.12 – 0.15 kg/m² (coloured) |
These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level, wastage, etc.
EQUIPMENT
Sikafloor® TC 442 W must be thoroughly mixed using a low speed electric stirrer (~300 rpm) or other suitable equipment.
SUBSTRATE QUALITY
The coating to which Sikafloor® TC 442 W is applied should be clean and dry. Application should take place within the recoating intervals of the coating on which it will be applied.
MIXING
Sikafloor® TC 442 W is supplied in working packs which are pre-packaged in the exact ratio. Before mixing, pre-condition both A and B components to a temperature of approximately 15 to 25°C. Pour the entire contents of Parts A and B into a clean pail.
DO NOT MIX BY HAND.
Mix with a mechanical drill and paddle at a low speed (~300 rpm) for at least 3 minutes. Scrape the sides and the bottom of the container several times to ensure complete mixing. Keep the mixer blades submerged in the coating to avoid introducing air bubbles.
DO NOT WORK OUT OF THE CONTAINER USED FOR MIXING.
After proper mixing to a homogeneous consistency pour the mixed Parts A and B into a fresh container and mix for another minute.
APPLICATION
As with all waterborne sealers, it is important to avoid dry edges by always working 'wet-on-wet' when overlapping, otherwise roller marks will be visible in the final finish. Use a maximum 40 cm, medium nap roller, start in the middle of one of the short sides of the floor. Dip the roller into the mixed material and roll out a strip of Sikafloor® TC 442 W, parallel to the wall out to one of the corners. Dip the roller into the material once again and roll out a second strip from the starting point out to the other corner. Move backward and repeat these steps, overlapping the first strip by a few cm.
Use a second roller, starting in one corner; back roll the Sikafloor® TC 442 W, without stopping, to the other corner. Offset the roller by 10 – 20 cm and roll over, again without stopping, to the opposite wall. Always roll in the same direction, do not back roll in a crisscross pattern. When almost all the laid material has been back rolled, lay two more strips and back roll as described above. Using this method, the period between the overlapping should not exceed 1 to 4 minutes and visible roller marks will be minimised. Depending of the application method and quantity, Sikafloor® TC 442 W can have a light structure, without influencing the final properties.
Sikafloor® TC 442 W dries primarily by evaporation of water followed by a chemical cross-linking reaction. Therefore, when applying Sikafloor® TC 442 W, the ambient temperature and humidity is of importance. High humidity (especially in combination with low temperatures) slows down the drying process. After application, the surface should be protected from direct contact with water for at least 24h (+23°C / 50% r.h.).
NOTE: To ensure a uniform color, use only the same batch number of product for the same area.
CLEANING OF TOOLS
Re-usable tools should be carefully cleaned immediately after use with water. Once the material has cured, mechanical cleaning is required.
CLEANING
Due to the good cleaning ability of Sikafloor® TC 442 W, initial care is not necessarily required. The slight surface structure can be seen by a glossy cleaning maintenance. In order to preserve the aesthetic properties, satin matt to matt cleaning maintenance is suitable.