SikaScreed HardTop-60, Indoor Quick Screed
SIKA
Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.
Read moreCementitious, rapid hardening, high strength, floor levelling screed SikaScreed® HardTop-60 is a cementitious, 1-part,rapid hardening, high strength, floor levelling screed and repair mortar for industrial floors. Provides a low maintenance, high mechanical and abrasion resistant smooth screed, suitable as a finished surface or a base layer for resin based coatings. Thickness 8–80 mm (0.315–3.15 in). Internal use. External use when overcoated. | |||||||||||||||||||||||||||||||||||||||
Usage
Advantages
Packaging25 kg (55.1 lb) bags, 1000 kg (2205 lb) bags ColourSmooth, grey finish | |||||||||||||||||||||||||||||||||||||||
Typical Product Data
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ApplicationMixing Ratio ~2.8–3.0 L (~0.74–0.793 gal) of water for 25 kg (55.1 lb) of powder Fresh Mortar Density ~2.25 kg/l (~18.8 lb/gal) Layer Thickness 8–80 mm (0.315–3.15 in) Minimum thickness guidelines:
* Loading / use of the floor and the presence of underfloor heating will determine the thickness of the screed. Minimum thickness indicated is for unheated and lightly loaded floors. Also refer to the Sika Method Statement “SikaScreed® HardTop- range”. Product Temperature +10 °C (+50 °F) min. / +25 °C (+77 °F) max. (fresh mortar) Ambient Air Temperature +10 °C (+50 °F) min. / +30 °C (+86 °F) max. Substrate Temperature +10 °C (+50 °F) min. / +30 °C (+86 °F) max. Pot Life ~30 min at +20 °C (+68 °F) Waiting Time / Overcoating Start surface finishing/smoothing 90 minutes after application. Finishing time is comparable to concrete finishing. After surface finishing/smoothing, the specific system resin based flooring primer may be applied. If a resin based flooring primer is not required, a polythene sheet must be used as protective covering. Times are approximate and measured at +20 °C (+68 °F) and > 50 % r.h. Application times will be affected by changing substrate and ambient conditions, layer thickness and water content. Applied Product Ready for Use ~18 hours (without coating or impregnation application). Time is approximate and measured at +20 °C (+68 °F) and > 50 % r.h. Time will be affected by changing substrate and ambient conditions, layer thickness and water content. Consumption ~2.05 kg/m² per mm. This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc. EQUIPMENT SUBSTRATE PREPARATION Abrasive blast cleaning or planing / scarifying equipment MIXING Small - medium volumes Mixing containers Weighing scales Water containers Water measuring container Double spiral mix paddle & drill (< 500 rpm) Forced action mixer or rotating pan, paddle or trough type. Free fall mixers must not be used. Large volumes Weighing scales Water containers Water measuring container Forced action mixer or rotating pan, paddle or trough type. Free fall mixers must not be used. Continuous mortar mixer and integral delivery pump with associated hoses i.e. inoCOMB Cabrio 0.2 . APPLICATION Mixed material carriers/carts ( wheel barrows) Spreading equipment Height levelling equipment Screed bar /straight edge Screed rails SURFACE FINISHING Hand trowels Walk behind power trowels ( disc and blade types) Finishing brooms CURING Polyethylene sheeting MIXING Small - medium volumes Pour the minimum recommended clean water quantity in a suitable mixing container. While stirring slowly with drill and mixing paddle, 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. slowly, 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 and compared to mixing by drill and mixing paddle technique. APPLICATION BONDED SCREEDS Bonding bridge SikaScreed®-20 EBB: To the prepared dry or matt damp substrate without any standing water. Apply SikaScreed® HardTop-60 ‘wet on wet’ within 30 minutes of mixing (+20°C (+68 °F)). Also refer to SikaScreed®-20 EBB Product Data Sheet. Note: If the SikaScreed®-20 EBB bonding bridge has dried, it must be removed mechanically and replaced before application of SikaScreed® HardTop-60. APPLICATION Bonded, unbonded and floating Screeds Pour mixed SikaScreed® HardTop-60 onto prepared substrate and apply evenly to the required thickness using appropriate spreading equipment. Level surface with screed bar /straight edge Surface finishing Finishing should be carried out to the required surface texture using suitable finishing tools. To obtain optimum surface strength, finish SikaScreed® HardTop-60 with suitable equipment such as trowels or walk-behind power floats. Do not use heavy ride-on trowelling machines.
It is possible to float the surface several times up to a very smooth surface to achieve high abrasion resistance values. For this requirement, initial finishing process should be carried out using a disc power float. Extended surface smoothing should then be completed using a walk behind helicopter / blade type power float. Small areas which are difficult to access and where optimum surface strength is not required, use suitable hand trowels. Curing Curing must start after the last finishing operation using polyethylene sheeting or the application of a suitable system primer. Refer to appropriate system datasheet. Curing with polyethylene sheeting must be maintained for at least 18 hours. At temperatures between +10 °C (+50 °F) and +15 °C (+59 °F) (substrate and air) the screed has to be cured with polyethylene sheeting for at least 24 hours. CLEANING OF TOOLS Clean all tools and application equipment with water immediately after use. Hardened material can only be removed mechanically. |