SikaScreed®-40

12 months in its original bag

Store in a dry place, ensuring that the product is not exposed to rain, condensation or high humidity. For best results, condition product at temperatures between 18 °C and 29 °C (65 °F and 84 °F) before using.

2080 kg/m³ (130 lb/ft³)

4 mm

Compressive strength*

*4 x 4 x 16 cm test cylinders, at 20 °C – 100 % HR (values provided as indicative)

Bond strength      

≥ 3 MPa on textured surface

Contact Sika Canada for more information

Between 5 and 35 °C (41 and 95 °F)

Between 5 and 35 °C (41 and 95 °F)

Between 5 and 35 °C (41 and 95 °F)

Return to service* :

• Pedestrian Traffic: 12 hours
• Heavy Traffic: 24 hours

Waiting time before overlay installation* :

• 5 hours for ceramic flooring
• 24 to 36 hours for moisture sensitive flooring
• 48 hours for wood or resinous flooring systems

* The above data is provided as an indication, for a temperature of 23 °C and relative humidity of 50 % when applied at 150 mm (6 in). Moisture content was measured at ≤ 5 % by mass using a Tramex® CME/CMExpert type concrete moisture meter. Average moisture content will vary according to the actual drying conditions (temperature and relative humidity in particular) and the finish method. Prior to the installation of the floor covering, the residual moisture content of the screed should be measured with a calibrated moisture meter and it should be ensured that the moisture content of the screed conforms to the written requirements of the manufacturer of the floor covering to be installed.

90 minutes

150 minutes

• Up to 1 hour at 23 °C (73 °F)
• Approx. 45 minutes at 30 °C (86 °F)

Approx. 11.9 L (0.42 ft³) per 22.7 kg (50 lb) bag

Provide and form control joints according to industry recommendations.

The concrete substrate will be structurally sound, solid and stable.The cohesion of the substrate must be checked and must exceed 1 MPa.

The surface must be clean and free of dust, oil, grease, paint, tar, wax, hardener, primer, sealer, laitance, loose particles, loosely adhered surface patches and any material or contaminant that may prevent or reduce bond performance.

Perform the preparation work with a jackhammer, high pressure water blasting or other appropriate mechanical means such as shot blasting, to obtain a rough surface profile (ICRI / CSP ≥ 5). Next, sweep the surfaces, then use a vacuum cleaner fitted with a brush attachment to dislodge and remove all the dust and dirt. Saturate the substrate with clean potable water the day before and on the day of application so that the substrate is saturated surface dry (SSD) but free of standing water at the time of application. 

Pour 1.9 to 2.1 L (0.50 – 0.55 US gal) of clean, fresh water per 22.7 kg (50 lb) bag of mortar into a clean, suitably sized container. Gradually add the powder and mix at low speed (300 rpm) for approximately three (3) minutes until a homogeneous mix is obtained.

Note: For thicker applications or for large surfaces, it may be more practical to use a low speed mortar mixer.

At the time of application, the surface must be saturated surface dry (SSD) and free of standing water. Apply a small quantity of SikaScreed®-40 mix and brush it vigorously over the surface of the substrate using a stiff nylon brush (brushed grout). Immediately pour more product into the freshly brushed grout.

Another method is to mix one (1) part SikaScreed®-40 with one (1) part undiluted Sika® Latex R to achieve a slurry consistancy. Apply the slurry with a brush or stiff-bristle broom to the surface to be covered. Ensure that the entire surface and edges are thoroughly coated.

Pour additional SikaScreed®-40 mortar mix immediately over the brushed grout or slurry before it dries, then spread and level the mortar on the suitably prepared substrate to a minimum thickness of 10 mm (3/8 in) for slope shapes.

Maximum application thickness is 150 mm (6 in).

Note: For larger jobs, consider first making and installing guide strips to level the screed.

For exterior applications, to achieve performance consistent with Technical Data, curing is required and must be provided as per ACI 308 recommendations for cement concrete. Use a recognized curing methods, such as wet burlap covered with white polyethylene film or approved water-based curing compound. Curing must begin immediately after placing and finishing. Alternatively, the use of Sika® Ultracure DOT^TM or NCF^TM curing blankets is strongly recommended. Curing must commence immediately after placing and finishing. Moist-curing must be maintained for the first 24 hours only. Protect freshly applied mortar from direct sunlight, wind, rain and frost.

Clean all tools and equipment after use with water. Once hardened, the product can only be removed manually or mechanically