SikaScreed® HardTop-60
Cementitious, 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. Internal use. External use when overcoated.
- Rapid hardening screed and repair mortar (≥ 35 N/mm² 24 hours)
- Long surface finishing window ( > 60 minutes)
- Usability after ~24 hours hardening
- Pre-batched,1-part mortar. Only needs the addition of water
- Low maintenance
- Easy to apply and laid as monolithic flat floor finish or on a slope.
- High mechanical and abrasion resistance
- Final trafficable screed wearing layer
- Screed suitable for underfloor heating (Water and electrical systems)
- May be covered or overlaid with epoxy, PU or hybrid flooring systems after 18 hours
- Application of specific resin-based flooring primer within hours after placing SikaScreed® HardTop-60
- Exterior use with surface impregnation / coating protection
Usage
- SikaScreed® HardTop-60 may only be used by experienced professionals.
- Repair and levelling of large area industrial floors
- Bonded, unbonded and floating screed wearing layer system
- Bonded, unbonded and floating screed base layer for resin top coats
Advantages
- Rapid hardening screed and repair mortar (≥ 35 N/mm² 24 hours)
- Long surface finishing window ( > 60 minutes)
- Usability after ~24 hours hardening
- Pre-batched,1-part mortar. Only needs the addition of water
- Low maintenance
- Easy to apply and laid as monolithic flat floor finish or on a slope.
- High mechanical and abrasion resistance
- Final trafficable screed wearing layer
- Screed suitable for underfloor heating (Water and electrical systems)
- May be covered or overlaid with epoxy, PU or hybrid flooring systems after 18 hours
- Application of specific resin-based flooring primer within hours after placing SikaScreed® HardTop-60
- Exterior use with surface impregnation / coating protection
Packaging
25 kg bags, 1000 kg bags
Colour
Smooth, grey finish
Product Details
ENVIRONMENTAL INFORMATION
- VOC emission classification GEV-Emicode EC1PLUS
APPROVALS / STANDARDS
- CE Marking and Declaration of Performance to EN 13813 - Cementitious screed material for use internally in buildings.
Chemical Base
Special cement based powder with hard aggregates
Shelf Life
12 months from date of production
Storage Conditions
Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Maximum Grain Size
Dmax: 3.2 mm
Bulk Density
~1.50 kg/l
Product Declaration
EN 13813: Class CT-C60-F7-A6
System Structure
Bonding bridge:
- SikaScreed®-20 EBB
Screed:
- SikaScreed® HardTop-60
Abrasion Resistance
Class | Value | Method |
A6* | ≤ 6 cm3 / 50 cm2 | Böhme |
* performed on a power floated surface
Compressive Strength
Time | Temperature | Value |
24 hours | +20 °C | ~35 N/mm2 |
28 days | +20 °C | ≥ 60 N/mm2 |
Flexural Strength
Time | Temperature | Value |
24 hours | +20 °C | ~ 4 N/mm2 |
28 days | +20 °C | ≥ 7 N/mm2 |
Reaction to Fire
A1fl
Application
Mixing Ratio
~2.8–3.0 L of water for 25 kg of powder
Fresh Mortar Density
~2.25 kg/l
Layer Thickness
8–80 mm
Minimum thickness guidelines:
Bonded screed and repairs | 8 mm |
Unbonded screed and repairs | 40 mm |
Floating screed | 40 mm * |
* 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 min. / +25 °C max. (fresh mortar)
Ambient Air Temperature
+10 °C min. / +30 °C max.
Substrate Temperature
+10 °C min. / +30 °C max.
Pot Life
~30 min at +20 °C
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 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 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). 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.
Start finishing / smoothing | 1.5–3 hours after laying |
Finishing time | comparable to concrete |
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 and +15 °C (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.