Sikafloor® TC 442 W

• 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. 

Polyurethane

12 months

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.

All density values are at +23°C.

43% (clear)

47% (coloured)

Heavy load (1000g steel ball)

>2.0MPa 

>0.50

Resistant to many chemicals. Please ask for a detailed chemical resistance table.

Part A : Part B = 80:20 (by weight)

+10 °C minimum / +30 °C maximum

30% r.h. minimum / 90% r.h. maximum

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.

+10 °C min. / +30 °C max.

Matt, light structure system:

These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level, wastage, etc.

Sikafloor® TC 442 W  must be thoroughly mixed using a low speed electric stirrer (~300 rpm) or other suitable equipment.

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. 

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.

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.

Re-usable tools should be carefully cleaned immediately after use with water. Once the material has cured, mechanical cleaning is required.

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.