SikaLevel®-528

SikaLevel®-528 follows the main requirements of EN 13813, class CT-C20-F4-B1,0

12 months from date of production

Store in undamaged, unopened, original sealed packaging in dry conditions, at temperatures between +5°C and +35°C. Protect from direct sunlight, heat and moisture.

~2.06 kg/l (Mixed, at 25°C)

min. 2 mm

max. 30 mm

min. +5°C / max. +35°C

80 % max.

3.5 L of water per 20 kg bag

Beware of condensation!
The substrate and uncured floor must be at least 3°C above dew point to reduce the risk of condensation, blooming or laitance on the floor finish.

min. +5°C / max. +35°C

< 4 % pbw moisture content.
Test method: Sika®-Tramex meter, CM - measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).

~30 minutes 

Note: At 25°C and 50% RH. Times are approximate and will be affected by changing substrate and ambient conditions, particularly the temperature and relative humidity.

Note: At 25°C and 50% RH. Times are approximate and will be affected by changing substrate and ambient conditions, particularly the temperature and relative humidity.

When covering the SikaLevel®-528 always ensure the moisture content has achieved the required value for the product to cover, as the waiting time will vary with the application thickness and ambient humidity. (Refer to the covering product data sheet)

Note: At 25°C and 50% RH. Times are approximate and will be affected by changing substrate and ambient conditions, particularly the temperature and relative humidity.

~2.1 kg of powder per m² per mm thickness.

This figure is theoretical and does not include for any additional material required due to surface porosity, surface profile, variations in level or
wastage, etc.

~9.5 L / 20 kg bag

Substrate must be clean and free of oil, sealers, curing compounds, paint, polymer coatings, dust or other foreign (contaminating) matter.

Remove all weak or broken pieces of concrete. If necessary, employ mechanical cleaning methods and equipment. If sealers, paint, polymer coatings or curing compounds are present on concrete substrate, remove with mechanical shotblasting equipment.

Voids and cracks (water pipes, holes, drainage pipes etc) should be filled to prevent seepage through to lower levels. Consult with your local Sika Technical Representative for product recommendations.

Joints from the base slab should always be mirrored in topping. Cut the topping directly above joints in the base slab, to avoid random cracking.

PRIMING:

The substrate shall be saturated with SikaCeram® P 302 diluted with water in 1:1 ratio. Use min. 0.2 L of the diluted primer for the initial priming. Allow to dry until a transparent film has been formed. Absorbent / porous substrates should be primed twice. The second coat shall be approx. 0.07 L / m² of the diluted primer. Application by brush or roller. Please refer to the relevant Product Data Sheet for recommended applications and details.

Mechanical mixing is required for SikaLevel®-528. For small areas, a slow speed stirrer of not more than 600 rpm fitted with a helical paddle, is suitable. Mixing time is 3 minutes.

Place the required quantity of water into the mixing vessel. Whilst mixing, slowly add the powder to the water within 2 minutes then mix for a further 1 minute. Allow mixed SikaLevel®-528 to stand for 3 minutes and then remix for 1 minute prior to application. Use chilled water at high temperatures for longer application time.

For improved efficiency and continuous production of SikaLevel®-528, it is recommended to use at least two mixing buckets.

For larger applications, the use of a suitable mechanical mixer/pump unit is recommended.

Pour mixture over substrate or pump through a suitable pump to desired thickness.

Whether pouring from a mixing vessel or using a mechanical mixer with an application hose, the discharge point should be approximately 200 mm from the floor to prevent splashing and air entrapment.

Progress should be steady and even. Application should take place continuously into the preceding wet material to ensure even thickness and flow. Do not make new edges and ‘fill in’ the middle.

The fresh wet topping can be rolled immediately with a suitable long spiked roller to release all air retained within the underlayment. Do not roll material that has been applied for more than 2-3 minutes.

SikaLevel®-528 is self-curing, but as with all cementitious products in hot weather, take adequate measures to protect it from exposure to direct sunlight and hot winds. DO NOT use water spray or liquid membrane curing compounds, as these may affect the surface texture or prevent bonding of subsequent adhesives used with floor coverings.

Clean all tools and application equipment with water immediately after use. Hardened / cured material can only be removed mechanically.