SikaScreed® HardTop-65

• CE Marking to EN 13813: CT-C65-F7-A6
• CE Marking to EN 1504-3: Class R4
• Fire behaviour: Class A1

Special cement binder with fibres and hard aggregates

Product must be stored in original, unopened and undamaged packaging in dry conditions at temperatures between +5 °C and +30 °C.

~2.3 kg/litre (fresh mortar density)

Dmax: 3.2 mm

Exemplary system structure:

Consumption depends on substrate roughness and application method.

For further system structures, please contact your technical expert.

*with application of Sikafloor®-140 W Troweling Primer

~3,0-3.75 litre of water for 25 kg of powder

8–100 mm

Minimum +10 °C / maximum +25 ° C

Minimum +10 °C / maximum +30 °C

Minimum +10 °C / maximum +30 °C

~30 min. (+20 °C)

Surface finishing or smoothing can be carried out after approx. 90 minutes after application of SikaScreed® HardTop-65. If a rapid coating within a few hours with Sika® reaction resin systems is scheduled, Sikafloor®-140 W Troweling Primer must be applied before the smoothing process. If a rapid coating is not intended, a polyethylene sheet must be applied as a protective cover.

Times are approximate and measured at +20 °C and > 50 % r.h. Application times will be affected by changing substrate and ambient conditions, layer thickness and water content.

For more information, see the method statement.

Time is approximate and measured at +20 °C and > 50 % r.h.

~2 kg/m² per mm layer thickness

Consumption depends on substrate roughness and application method.

Small - medium  volumes

Pour the minimum recommended clean water quantity into a suitable mixing container. While stirring slowly with electric paddle mixer, add the powder to the water and mix thoroughly for at least for 3 minutes adding additional water if necessary, to the maximum specified amount and adjust to the required consistency to achieve a smooth consistent mix. The consistency must be checked after every mix. 

Large volumes

Pour the minimum recommended clean water quantity into the forced action mixer / rotating pan or continuous mortar mixer and integral delivery pump. Add the powder to the water and mix thoroughly for at least for 3 minutes to achieve a smooth consistent mix. The consistency must be checked regularly and included in a jobsite quality control plan. Compare mixing consistency with drill and mixing paddle technique.

  
Pumping
When using a mortar pump with appropriate equipment (e.g. Inotec - InoCOMB). Set up the equipment to achieve a smooth consistent mix. Control the water dosage to achieve the required consistency. Compare mixing consistency with drill and mixing paddle technique.

Further information is contained in the method statement.

The freshly mixed bonding primer is sufficiently applied to the concrete substrate. Already hardened bonding primer is to be removed and applied again before the application of SikaScreed® HardTop-65.
The mixed SikaScreed® HardTop-65 is applied wet-on-wet into the system bonding primer and applied with suitable tools until the appropriate layer thickness is achieved.

Easy application standing by using a dabble bar from a layer thickness of 20 mm.

To achieve an improved surface strength, SikaScreed® HardTop-65 should be smoothed with a trowel. Too early smoothing can lead to blistering or cracking. To smooth the surface, board shoes must be worn when walking on the fresh mortar layer. Only use suitable plate and trowel trowels with a large diameter and low weight.

Protect fresh mortar immediately from premature drying using polythene sheet. The curing method should be continued at least over night (18 hours).

Further information is contained in the method statement.

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