Sikafloor® -19N PurCem (CN) High Duty Coloured Polyurethane Floor Screed
发布时间：2023/05/15
Product Data Sheet
Edition 20/03/2012EN
Sikafloor® -19N PurCem (CN)
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Sikafloor® -19N PurCem (CN)
Sikafloor® -19N PurCem (CN)
High Duty Coloured Polyurethane Floor Screed
Product
Description
Sikafloor® -19N PurCem (CN) are trowel grade, heavy duty, solid colour, four -
component, water dispersed polyurethane-based / cement and aggregate screeds
designed to provide excellent resistance to abrasion, impact, chemical attack and
other physical aggression. Sikafloor ® -19N PurCem (CN) has a slightly textured
aggregate surface providing light slip resistance. The systems are typically installed
at 6 to 9 mm thickness.
Uses
Sikafloor® -19N PurCem (CN) floors are primarily used to protect concrete
substrates, but are equally effective over most steel surfaces that have been
properly prepared and supported.
Typically used in food processing plants, wet and dry process areas, freezers &
coolers, thermal shock areas, dairies, breweries, wineries, distilleries,
laboratories, chemical process plants, pulp and paper plants, warehouses and
storage areas.
Characteristics /
Advantages
Resists a very wide range of organic and inorganic acids, alkalis, amines, salts
and solvents. Consult Sika Technical Sales for full details. Refer to the Sikafloor®
PurCem (CN) Chemical Resistance Chart.
Similar coefficient of thermal expansion to concrete allowing movement with the
substrate through normal thermal cycling. It will perform and retain its physical
characteristics through a wide temperature range from -40ºC up to 120ºC.
Steam cleanable at 9 mm thickness.
Bond strength in excess of the tensile strength of concrete, concrete will fail first.
Non-taint, odourless.
Behaves plastically under impact / deforms but will not crack or debond.
Natural textured surface through the entire life of the product.
High abrasion qualities result from its pure silica aggregate structure.
Extra Expansion joints are not necessary; simply maintain and extend existing
expansion joints up through the Sikafloor® PurCem (CN) Flooring System.
USDA acceptance for use in food plants in the U.S.A.
Canadian Food Inspection Agency acceptance for use in food plants in Canada.
British Standard Specifications (BSS) acceptance for use in the U.K.
Technical Data
Packaging
57 kg/set.
Comp.A: 5 kg/pail, Comp.B: 4.6 kg/pail, Comp.C: 2 bags of 22.9kg/bag,
Comp.D: 1.6 kg/pack
Colour
Seven standard colours are available (all are approximate :)
Beige, Maize Yellow, Oxide Red, Grass Green, Slate Grey, Dusty Grey, Traffic
Grey
Custom colours subject to minimum orders.
Yield
Approximately 4.5 m2 per unit at 6 mm
Approximately 3.0 m2 per unit at 9 mm
(These figures do not allow for surface porosity, profile or wastage)
Construction2
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Sikafloor® -19N PurCem (CN)
Shelf Life
Components A and B: 1 year in original unopened packaging.
Component C and D: 6 months in original unopened packaging.
Store dry between 10℃ - 25℃. Protect from freezing.
Mix Ratio
Components A:B:C:D = Mix full units only.
Properties at 23°C and
50% R.H.
Application Temperature
10ºC min. / 30ºC max.
Optimal application temperatures range : 20ºC - 25ºC
Density ASTM C 905
2.12 kg/L
Flow
180 mm
Service Temperature
-40ºC min. / 120ºC max.
Cure Time at
Usable pot life 15-20 min at 20ºC
Initial join up time 20-25 min at 20ºC / 6 mm
Cure to foot traffic 10-12 h at 20ºC / 6 mm
Cure to light traffic 16-18 h at 20ºC / 6 mm
Full cure 5 days at 20ºC / 6 mm
Softening Point
130 ºC
Compressive Strength
ASTM C579
24 h 22 MPa
7 days 35 MPa
28 days 37 MPa
Tensile Strength
ASTM C 307
3.1 MPa
Flexural Strength
ASTM C 580
9.0 MPa
Bond Strength
ASTM D 4541
> 1.75 MPa (substrate failure)
Thermal Compatibility
ASTM C 884
Pass
Hardness, Shore D
ASTM D 2240
80-85
Indentation
MIL-PRF-24613
~ 0%
Impact Resistance
ASTM D 2794
5.67 joules at 3 mm o f thickness
Abrasion Resistance
ASTM D 4060
H-22/1000 cycles/1000 g
-3.18 g
Coefficient of Friction
ASTM D 1894-61T
Steel 0.5
Rubber 0.7
Coefficient of Thermal
Expansion ASTM D 696
1.9 x 10-5 mm/mm/ºC
Water Absorption
ASTM C 413
0.28%
Chemical Resistance
Consult Sika Technical Sales 3
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Sikafloor® -19N PurCem (CN)
How to Use
Surface Preparation
Concrete surfaces must be clean and sound. Remove all dust, dirt, existing paint
films, efflorescence, exudates, laitance, form oils, hydraulic or fuel oils, brake fluid,
grease, fungus, mildew, biological residues or any other contaminants which may
prohibit good bond. Prepare the surface by appropriate mechanical means,
approved by Sika to achieve (CSP 3-6). The compressive strength of the concrete
substrate should be at least 25 MPa at 28 days and a minimum of 1.5 MPa in
tension at the time of application. Repairs to cementitious substrates, filling of
blowholes, leveling of irregularities, etc. should be carried out using an appropriate
Sika profiling mortar.
Contact Sika Technical Sales for a recommendation.
Edge Terminations - All free edges of a Sikafloor® PurCem (CN), whether at the
perimeter, along gutters or at drains require extra anchorage to distribute
mechanical and thermal stresses. This is best achieved by forming or cutting
grooves in the concrete. Grooves should have a depth and width of 2 times
thickness of the Sikafloor® PurCem (CN) mortar. Refer to the edge details provided.
If necessary, protect all free edges with mechanically attached metal strips. Never
featheredge, always turn into an anchor groove.
Expansion Joints - Should be provided in the substrates at the intersection of
dissimilar materials. Isolate areas subject to thermal stresses, vibration movements
or around load-bearing columns and at vessel sealing rings.
Refer to details.
Mixing
Mixing will be affected by temperature.
Condition materials for use from 18ºC to 25ºC.
Stir Component A first for approx. 15 seconds.
Add component B, and mix for approx. 30 seconds with low speed mixer.
While mixing, add simultaneously but slowly (DON’T DUMP!) component C
(powder) and Component D (pigment pack) within 15 seconds.
Further mix for 2 minutes until the mixture is homogeneous and the pigment is
uniformly dispersed.
Mix full unit only
Application
Sikafloor® PurCem (CN) trowel grade materials are applied with normal steel
plastering or cement-finishing trowel 30 x 10 cm. Do not use serrated hand
trowels .Priming of concrete substrates is not usually required under typical
circumstances. However, due to variations in concrete quality, surface conditions,
surface preparation and ambient conditions, reference test areas are recommended
to determine whether priming is required to prevent the possibility of blisters,
debonding, pinholes and other aesthetic variations.
Pour the material from the mixer pail along the wet edge. Using considerable top
pressure on the trowel, spread material from side to side, push back into the
previous mix (wet edge), pull forward to establish the thickness and then, with a
lighter pressure, trowel from side to side to close up. The last few strokes should
always be in one direction only, left to right or right to left, but never back and
fourth. Excessive trowelling will bring the resin to the surface reducing the anti-slip
surface.
Clean Up
Clean all tools and equipment with Sika® Equipment Cleaner/Epoxy Thinner. Wash
soiled hands and skin thoroughly in hot soapy water or use Sika® Hand Cleaner.
Once hardened, product can only be removed mechanically.
Sikafloor® PurCem (CN) floors are easily cleaned using a stiff brushing action and
or high-pressure water, preferably hot, and even live steam. Degreasing agents and
detergents will assist, but do not use any compounds containing Phenol as the floor
colour may be damaged. Consult the cleaning compound manufacturer’s
instructions before use.
Maintenance
Sikafloor® PurCem (CN) floors are easily cleaned using a stiff brushing action and
or high pressure water, preferably hot, and even live steam. Degreasing agents and
detergents will assist, but do not use any compounds containing Phenol as the floor
colour may be damaged. Consult the cleaning compound manufacturer’s printing
directions before use. 4
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Sikafloor® -19N PurCem (CN)
Limitations
Do not apply below 10ºC or above 30ºC / maximum relative humidity 85%.
Do not apply to un-reinforced sand cement screeds, asphaltic or bitumen
substrate, glazed tile or non-porous brick, tile and magnesite, copper,
aluminium, soft wood, or urethane composition, elastomeric membranes, fibre
reinforced polyester (FRP) composites.
Do not apply to wet or green concrete or polymer modified patches if the
moisture content > 10%.
Do not apply to concrete if air or substrate temperature is within 3ºC of dew
point.
Protect substrate during application from condensation from pipes or any
overhead leaks.
Do not apply to vertical or overhead surfaces / for vertical surfaces refer to
Sikafloor® 29N PurCem (CN).
Do not featheredge.
Do not mix Sikafloor® PurCem materials by hand / mechanical mix only.
Do not apply to cracked or unsound substrates.
Do not apply to surfaces where moisture vapour can condense and freeze.
Colour uniformity cannot be completely guaranteed from batch to batch
(numbered). Take care when using Sikafloor® PurCem products to draw from
inventory in batch number sequence, do not mix batch numbers in a single floor
area.
Always allow a minimum of 48 hours after product application prior to placing
into service in proximity with food stuffs.
Products of the Sikafloor® - PurCem® (CN) product range are subject to
yellowing when exposed to UV radiation. There are no measurable losses of
other properties when this occurs and it is a purely aesthetical matter. Products
can be used outside provided the change in appearance is acceptable by the
customer.
Caution Component A - Frequent or prolonged skin contact may cause some local short
term skin irritation. Avoid eyes contact, may cause slight transient irritation.
Component B - Harmful by inhalation. Irritating to eyes, respiratory system and
skin. May cause sensitization by inhalation and skin contact.
Component C and D - Risk of serious damage to eyes. In case of contact with
eyes, rinse immediately with plenty of water. May cause skin irritation. Avoid
breathing dusts. Respirable dusts could if inhaled over a prolonged period
constitute a health hazard.
Consult product label for additional information.
First Aid
In case of skin contact, wash thoroughly with soap and water. For eye contact, flush
immediately with plenty of water for at least 15 minutes. Contact a physician
immediately. For respiratory problems, transport victim to fresh air.
For more information, consult Sika Material Safety Data Sheet.
Value Base
All technical data stated in this Product Data Sheet are based on laboratory tests.
Actual measured data may vary due to circumstances beyond our control.
Local Restrictions Please note that as a result of specific local regulations the performance of this
product may vary from country to country. Please consult the local Product Data
Sheet for the exact description of the application fields.
Health and Safety
Information
For information and advice on the safe handling, storage and disposal of chemical
products, users shall refer to the most recent Material Safety Data Sheet containing
physical, ecological, toxicological and other safety-related data.5
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Sikafloor® -19N PurCem (CN)
Notes:
The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in
good faith based on Sika's current knowledge and experience of the products when properly stored, handled and applied under
normal conditions in accordance with Sika’s recommendations. In practice, the differences in materials, substrates and actual
site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability
arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written
recommendations, or from any other advice offered. The user of the product must test the product’s suitability for the intended
application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties
must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the
most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on request.
Sika (China) Ltd.
No.28 Jingdong Road, Suzhou Industrial Park,
JiangSu,P.R.China
ISO 9001: 2008 ISO 14001:2004
Certificate No.:CC3576 Certificate No.:CC3577
The product is manufactured under a HKQAA
ISO9001/ISO14001
certified quality/environmental management system.
Construction