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

Product Data Sheet Show all documents

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

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

VOC emission classification GEV-Emicode EC1^PLUS

APPROVALS / STANDARDS

CE Marking and Declaration of Performance to EN 13813 - Cementitious screed material for use internally in buildings.

Product Information

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

D_max: 3.2 mm

Bulk Density

~1.50 kg/l

Product Declaration

EN 13813: Class CT-C60-F7-A6

System information

System Structure

Bonding bridge:

SikaScreed®-20 EBB

Screed:

SikaScreed® HardTop-60

Technical Information

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

Application Information

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.

Application steps

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.