SikaEmaco® S 488

6 months if stored at below mentioned storage conditions.

Store at ambient temperatures, out of direct sunlight, in cool, dry warehouse conditions and clear of the ground on pallets protected from rainfall prior to application.

2 mm

approx. 2.0 to 2.1 g/cm³

From 6 to 40 mm in one layer.

+5 to +30 °C

+5 to +35 °C

3.5 to 4.0 l water per 25kg bag

+5 to +35 °C

Approx. 45 to 60 minutes (at 21±2°C and 60±10% relative humidity).

Higher temperatures will reduce these times and lower temperatures will extend them.

Full cure of material is reached after 28 days (at 21±2 °C).

Approx. 1,850 kg powder is needed to prepare 1 m³ of fresh mortar.
A 25 kg bag will yield approx. 13 to 13.5 l of mortar.

Concrete must be fully cured, clean and sound to ensure good adhesion. All loose traces of concrete or mortar, dust, grease, oil, etc. must be removed.
SikaEmaco® S 488 needs a rough surface to bind to. Non-impact/vibrating cleaning methods, e.g. shot blasting, sandblasting or high-pressure water jetting are recommended to prepare and roughen the surface.  Aggregate should be clearly visible on the surface of the concrete structure after surface preparation.Make surface rough, using a chisel or scarifier. Cleaning methods, e.g. grit or high water pressure blasting are recommended. Aggregate should be clearly visible on the surface of the concrete structure after surface preparation. The prepared concrete must have a minimum direct tensile strength of 1.5 N/mm².
Cut the edges of the repair vertically to a minimum depth of 6 mm.
The prepared substrate should be completely pre-soaked for preferably 12, but least 2 hours before applying SikaEmaco® S 488. The surface must be mat-damp, but without standing water.
If reinforcing steel is visible, clean to a minimum grade of Sa 2 according to ISO 8501-1 / ISO 12944-4. Sandblasting of reinforcement is recommended. In case of chloride contamination of the concrete or when depth of cover is less than 10 mm, the reinforcement must be protected by using protective primers like e.g. SikaEmaco P 5000 AP.

Open the bags a short time before the mixing is started. Damaged or opened sacks should not be used. Pour the minimum amount of mixing water 3.5 l per 25 kg bag into the forced action mixer. Use clean tap water only!
Start the mixer and add SikaEmaco® S 488 rapidly and continuously. Mix for about 3 minutes until the mortar has a uniform and lump-free consisitency. Add water if necessary within the allowed mixing ratio until required consistency is achieved and mix again about 2 minutes.
The water content can slightly vary depending on ambient temperature and relative humidity.
Small mortar quantities can be mixed with a suitable paddle attached to a powerful, slow speed electric drill (max. 500 rpm).

Hand Application:

Before SikaEmaco® S 488 is applied to the final layer thickness, we advise to apply a thin scrape coat of mixed mortar or a bonding slurry mixed of SikaEmaco® S 488 mortar (with a bit more water) onto the prepared damp substrate. Then apply the mixed SikaEmaco® S 488 mortar wet-inwet using a screeding beam, trowel or wooden board to the desired thickness between 6 to max. 40 mm.

Spray Application:

First spray-apply a thin contact layer onto the prepared damp substrate, then apply multiple layers of SikaEmaco® S 488 until the required layer thickness of max. 40 mm is obtained. Spraying with the necessary pressure will improve the adhesion of SikaEmaco® S 488.

Finishing:

Smoothing with a trowel or finishing by wood or steel float can be done as soon as the mortar has begun to stiffen (usually after 60 to 90 minutes at 21±2 °C and 60±10 % rel. humidity). At lower temperatures and/or higher humidity these times will be extended; at higher temperatures and/or lower humidity these times will be shortened.

Immediately after the SikaEmaco® S 488 surface is finally finished, cover all exposed mortar with clean wet hessian and keep moist by covering with polythene between 1 to 7 days depending on the weather conditions. 

Tools and mixer must be cleaned immediately after use with water. Cured material can only be removed mechanically.