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Thoro® Crete SL

Thoro Crete SL, is a self levelling two-component, repair mortar, for the resurfacing or repair of damaged traffic bearing

concrete. This polymer modified, shrinkage compensated mortar can be applied in layer thickness’ varying from 5 to 25 mm.

Provides a smooth, wear-resistant surface suitable for a variety of applications as factory and warehouse floors, loading

bays car parks, garages and roadways, balconies.

Product benefits:• Easy and fast to apply: Self-levelling – no trowelling

is required

• Tough and durable, non dusting surface

• Can be mixed and placed mechanically

• High adhesion

• To be applied on damp substrates

• Freeze/Thaw resistant according to SS 137244

Technical data:• Pot-Life: ca. 20 minutes at 20 ºC

• Compressive strength:

– After 1 day: ≥ 10 MPa

– After 28 days: ≥ 35 MPa

• For layer thickness: 5 – 25 mm

• Adhesion strength: ≥ 2.0 MPa

• Modulus of elasticity: 20 GPa

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Thoro® specification guide

Selecting the right product for each application…

With this specification guide you can easily find which product to be used for your needs. Following scheme and tables

summarise the main features of the described products to assist the right product selection. Contact your nearest

BASF Construction Chemical technical office or your nearest Thoro distributor for further or detailed advice.

Thoro Structurite R4 Thoro Structurite LightThoro Crete SL

Thoro Structurite 100ThoroStructuritePrimer

Thoro Structurite FR

Thoro Crete HS

Thoro Structurite Level

Thoro Crete SL

Product Type of material Certified according

Thoro Structurite R4 PCC mortar EN 1504-3/Class R4

Thoro Structurite 100 CC mortar EN 1504-3/Class R4

Thoro Structurite FR CC mortar EN 1504-3/Class R4

Thoro Structurite Light PCC mortar EN 1504-3/Class R3

Thoro Structurite Level PCC mortar EN 1504-3/Class R2

Thoro Crete HS PCC mortar EN 1504-3/Class R4

Thoro Crete SL PCC mortar n.a.

Thoro Structurite Primer PCC mortar EN1504-7/Class AP

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Product selection

Thoro Structurite R4 √ √ √ √ √ √ √

Thoro Structurite 100 √ √ √ √ √ √

Thoro Structurite FR √ √ √ √ √ √

Thoro Structurite Light √ √ √ √ √ √

Thoro Structurite Level √ √ √ √ √ n.a. n.a.

Thoro Structurite Primer √ √ n.a. n.a. n.a. n.a. √

Thorocrete HS √ √ √ √ √ n.a. n.a.

Thorocrete SL √ √ √ √ √ n.a. n.a.

Thoro Structurite R4 ca. 20 minutes – 11 MPa 45 MPa ≥ 2.3 MPa

Thoro Structurite 100 ca. 60 minutes – 16 MPa 50 MPa ≥ 2.5 MPa

Thoro Structurite FR ca. 30 minutes – 25 MPa 55 MPa ≥ 3.5 MPa

Thoro Structurite Light ca. 30 minutes – 12 MPa 30 MPa ≥ 1.5 MPa

Thoro Structurite Level ca. 45 minutes – 10 MPa 35 MPa ≥ 0.8 MPa

Thoro Crete HS ca. 20 minutes 15 MPa 30 MPa 55 MPa ≥ 2.4 MPa

Thoro Crete SL ca. 20 minutes – 10 MPa 35 MPa ≥ 2.0 MPa

vert

ical

/ o

verh

ead

Pot Life @

20 ºC

Compressive

Strength after

2 Hours (*)

Compressive

Strength after

1 Day (*)

Compressive

Strength after

28 Days (*)

Adhesion

(*)

horiz

onta

l

thix

otro

pic

flow

able

cold

clim

ate

(fr

eeze

/ th

aw)

hum

id c

limat

e

(thun

der

/ sh

ower

)

hot c

limat

e

(dry

cyc

les)

carb

onat

ion

re

sist

ance

corr

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n in

hibi

tor

in

side

n.a. = not applicable

Products Typical Consistency Exposure Conditions Rebar Application Protection

Product Hardening Strength

(*) These values are typical values and not warranted minima

THORO CRETE SL

Self-levelling resurfacing mortar for concrete floors

Description of product THORO CRETE SL is a two component, self-levelling mortar. THORO CRETE SL part 1 is a powder blend of cement, graded sands, and special modifiers. THORO CRETE SL part 2 is an acrylic polymer emulsion. Uses To resurface or repair worn or damaged concrete floors. THORO CRETE SL provides a smooth, wear-resistant surface suitable for a variety of applications as: Factory and warehouse floors. Loading bays. Car parks, garages and roadways. Balconies. For inside and outside use. Benefits Aesthetics - Smooth finish. - Non-dusting. Durable - Tough and durable. - Excellent bond strength. - Good wearing properties. - Freeze thaw resistance according to SS 137244. Cost effective - Easy and fast to apply. - Self-levelling – no trowelling is required. - Can be mixed and placed mechanically. - Thin to medium layer thickness: 5 – 25 mm. Environmentally friendly - Cement based, contains no organic solvents.

Physical properties Typical properties for mixes using 25 kg powder and 4,725 litres of the liquid component (but dependent on curing conditions and temperatures). Product data Typical physical properties(a) Modulus of elasticity (28 days) ca. 20.000 N/mm² Mechanical strengths N/mm² Compressive 1 d. ± 10 7 d. ± 25 28 d. ± 35 Flexural 28 d. 5,5 Adhesive 28 d. > 2 (a) Typical values. All tests were carried out under temperature

controlled conditions of 21°C. Colours Grey. Coverage Under normal usage conditions at 5 mm thickness ± 3,1 m² (b) / 25 kg powder at 10 mm thickness ± 1,5 m² (b) / 25 kg powder at 25 mm thickness ± 0,6 m² (b) / 25 kg powder

(b) No waste factor included.

Packaging THORO CRETE SL part 1 25 kg sack THORO CRETE SL part 2 4,725 l jerry can Storage Both components should be stored under cover and clear of the ground. Protect the materials from all sources of moisture and frost (+5°C). Rotate stock in order not to exceed the shelf life of 6 months for THORO CRETE SL part 1 and 12 months for THORO CRETE SL part 2. Application Substrate quality Substrates to be resurfaced must be clean and sound. Substrate preparation Remove all traces of previous coatings, laitance, oil, curing compounds, organic growth or any other contaminants which may adversely affect the bond. Preferred methods of preparation include high pressure water-jetting, wet abrasive blasting, sand or grit blasting and vacuum shot-blasting. Not recommended are chemical cleaning methods such as acid etching or aggressive percussive methods such as scabbling, which may damage the substrate. A minimum pull-out strength of 1 N/mm² of the prepared substrate is required. Holes and cavities Holes or cavities over 25mm deep should be filled with THORO CRETE HS prior to the application of THORO CRETE SL. Finish repairs roughly to improve adhesion. Static cracks Small shrinkage cracks in the substrate may be ignored but cracks of 1 mm width or more should be repaired prior to the application of THORO CRETE SL. Moving cracks or joints Moving cracks or joints should be treated as such, i.e. any existing moving crack or joint in the substrate must be carried through the THORO CRETE SL. Wherever a THORO CRETE SL repair must connect to an existing level, the concrete must be cut to a minimum depth of 5mm. Feather edging is not permissible. Wherever a THORO CRETE SL repair is to join a non-concrete floor (tiles, resin based flooring or wood), a movement joint should be created to be filled later with a flexible sealant. Pre-treatment of the substrate After the substrate preparation, there are two methods for treating the surface prior to the application of the THORO CRETE SL mortar: saturation of the substrate with water or priming with THORO RAPID PRIMER. For inside applications, the surface can be primed with THORO RAPID PRIMER.

For outside applications, water saturation is to be preferred as it will enhance the quality of the finished surface. If water saturation is not feasible, please contact the Technical Department. Mixing Wet density ± 1,95 kg/dm³ Pot life > 20 minutes Mixing liquid ± 4,725 l (4,6 l – 4,8 l) THORO CRETE SL part 2 / 25 kg powder Blend 25 kilograms of powder (part 1) into approximately 5,0 litres of part 2. The quantity may vary slightly depending upon the ambient conditions. Mix to a lump-free consistency using a mortar mixer or, for larger projects, a mobile mixer. Allow the mix to saturate for 2 minutes and remix adding liquid or powder, when necessary, to obtain the correct consistency. Do not exceed the maximum liquid demand. Application Do not apply THORO CRETE SL to frozen substrates or when the temperature is below 5°C or expected to fall below 5°C within 24 hours. Remark: In case of continuous water load, do not apply THORO CRETE SL. Application inside and outside. In case of permanent water submersion, do not use THORO CRETE SL. This is only possible with an additional protection with for example tiles or THOROSEAL. The application of THORO CRETE SL is carried out in four stages: Saturation/Priming of the substrate The prepared concrete substrate should be saturated with clean water. This operation, which should be performed carefully, has the effect of displacing air from the substrate which otherwise would cause pinholes to occur in the THORO CRETE SL. Before proceeding to the next phase, standing water should be removed. Alternatively, for inside applications, the prepared substrate can be primed using THORO RAPID PRIMER. The primer is applied uniformly onto the dry substrate using a short hair or fine foam roller. Avoid puddles forming. Approximately 5 minutes after the first primer coat, a second layer is applied. Before proceeding to the next stage, allow the primer to cure and form a tack free film. This might take approximately 1 h. For full technical information, see the Product Data Sheet of THORO RAPID PRIMER. Application of the bonding slurry This is necessary to ensure good adhesion. Mix THORO CRETE SL as described above and brush firmly into the saturated substrate using a stiff broom. A THORO broom is recommended. Soft brooms must not be used. Application of a bonding slurry is not a necessity when THORO CRETE SL is applied onto a THORO RAPID PRIMER primed substrate. However, a bonding slurry has the effect of filling the entire roughness of the substrate, and consequently better adhesion could be achieved.

Application of the THORO CRETE SL Immediately after the bonding slurry has been applied, apply the THORO CRETE SL using a space rake adjusted to the required thickness. It is essential to plan the work so that the THORO CRETE SL is applied onto the wet bonding slurry and that a wet edge is maintained at all times. Whenever THORO CRETE SL is to be applied without a bonding slurry onto a primed substrate, apply the material in a similar way as described before directly onto the dry THORO RAPID PRIMER treated surface. Finishing This should be done using a spiked roller. After the THORO CRETE SL has been applied with the space rake it should be thoroughly rolled back-and-forth using a spiked roller. This has the effect of releasing entrapped air and ensures a smooth, level surface. It is usual for the rolling phase to be one mix unit behind the application by space rake so that the new mix is rolled evenly into the old. This ensures that the two mixes marry-in evenly. A skid resistant finish can be achieved by broadcasting dry silica sand into the fresh THORO CRETE SL, just prior to the moment the material starts to skin on the surface. After curing, excess sand can be removed. Curing Under normal climatic conditions no special curing procedures are needed. THORO CRETE SL should be ready for pedestrian traffic after 24 hours and fully operational after 72 hours. During hot, dry and windy conditions (above 25oC and below 55% relative humidity) as soon as the surface of the THORO CRETE SL has set dry, clean silica sand should be broadcast or polythene sheeting should be used over the entire surface. This will protect it from rapid uncontrolled drying. The sand can be removed by broom after a minimum of 24 hours.

When temperatures are low (5 - 15oC) and humidity high (above 90%) the setting and curing times of THORO CRETE SL will be extended. Under these conditions a longer curing period will be needed before opening to traffic. Clean up and spillages Not hardened material may simply be removed with water. Health and safety THORO CRETE SL is based on cement and thus can be irritating to the skin and eye. Gloves and eye protection should be worn. The use of dust masks is recommended. Accidental splashes of the material to the skin or eyes should be immediately washed off with clean water. In the event of prolonged irritation seek medical advice. In the case of ingestion give water or milk to drink and treat symptomatically. Medical advice should be sought. A Material Safety Data Sheet for this product is available on request.

Thoro

BASF Belgium Coordination Center Comm. V.- Business Belux – Construction Chemicals Nijverheidsweg 89 B-3945 Ham

www.thoro.com Tel. +32 11 34 04 32 Fax +32 11 40 13 92

B.T.W./T.V.A. BE 0862.390.376

RPR/RPM Antwerpen

Your distributor:

Important note: Whilst all reasonable care is taken in compiling technical data on the company’s products, all recommendations or suggestions regarding the use of such products are made without guarantee since the conditions of use are beyond the control of the company. It is the customer’s responsibility to make sure that each product is appropriate for the purpose for which he intends to use it and that the actual conditions of use are suitable. This edition replaces all previous editions.