Product Data Sheet
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Sikafloor®-29 PurCem® LP

HIGH STRENGTH POLYURETHANE COVING AND DETAILING MORTAR

Sikafloor®-29 PurCem® LP is a three, water dispersed, vertical grade, coloured polyurethane modified, cement and aggregate mortar for detailing work and vertical rendering.
It has a finely textured smooth aggregate appearance which offers excellent resistance to abrasion, chemical attack and mechanical damage.
Typically installed at 3 - 9 mm thickness

  • Excellent chemical resistance. Resists a wide range of organic and inorganic acids, alkalis, amines, salts and solvents. Please refer to the Chemical Resistance Chart or consult your local Technical Dept.
  • Designed specifically for trowel applications to vertical surfaces
  • 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 -40 °C (-40 °F) up to +140 °C (284 °F)
  • Bond strength in excess of the tensile strength of concrete. Concrete will fail first
  • Non taint, odourless
  • VOC free
  • High mechanical resistance. Behaves plastically subject to impact. Will deform but will not crack or de-bond.
  • Slip resistance. Natural textured surface provides anti-slip traction.
  • High abrasion resistance resulting from its silica aggregate structure
  • It is possible to apply on to 7 to 10 day old concrete after adequate preparation and with a tensile bond strength in excess of 1.5 N/mm2 (218 psi)
  • Sikafloor®-29 PurCem® LP detailing mortar can withstand moisture vapor transmission values of 12 lbs/1000 ft2 when tested in accordance with the ASTM F 1869 Anhydrous Calcium Chloride Test Method
  • Fast curing will allow foot traffic after twelve hours and full service after two days. Production downtime is cut to an absolute minimum
  • Jointless. Extra expansion joints are not necessary; simply maintain and extend existing expansion joints up through the Sikafloor®-PurCem® flooring system
  • Easily maintained
  • Wide range of application temperatures +10 °C - +35°C
 
Sikafloor®-29 PurCem® LP
Product Data Sheet
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Usage

In combination with the rest of the PurCem® range in concrete substrate areas, to provide vertical, coving and detailing solutions in areas of abrasion and high chemical exposure, such as in:
  • Food processing plants, in wet or dry process areas, freezers and coolers, thermal shock areas
  • Chemical plants
  • Laboratories
  • Workshops
  • Suitable for concrete protection providing physical resistance (Principle 5, method 5.1 of EN 1504-9)
  • Suitable for concrete protection providing chemical resistance (Principle 6, method 6.1 of EN 1504-9)
On properly prepared and supported steel surfaces, such as in:
  • Steel decks
  • Overpasses or platforms

Advantages

  • Excellent chemical resistance. Resists a wide range of organic and inorganic acids, alkalis, amines, salts and solvents. Please refer to the Chemical Resistance Chart or consult your local Technical Dept.
  • Designed specifically for trowel applications to vertical surfaces
  • 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 -40 °C (-40 °F) up to +140 °C (284 °F)
  • Bond strength in excess of the tensile strength of concrete. Concrete will fail first
  • Non taint, odourless
  • VOC free
  • High mechanical resistance. Behaves plastically subject to impact. Will deform but will not crack or de-bond.
  • Slip resistance. Natural textured surface provides anti-slip traction.
  • High abrasion resistance resulting from its silica aggregate structure
  • It is possible to apply on to 7 to 10 day old concrete after adequate preparation and with a tensile bond strength in excess of 1.5 N/mm2 (218 psi)
  • Sikafloor®-29 PurCem® LP detailing mortar can withstand moisture vapor transmission values of 12 lbs/1000 ft2 when tested in accordance with the ASTM F 1869 Anhydrous Calcium Chloride Test Method
  • Fast curing will allow foot traffic after twelve hours and full service after two days. Production downtime is cut to an absolute minimum
  • Jointless. Extra expansion joints are not necessary; simply maintain and extend existing expansion joints up through the Sikafloor®-PurCem® flooring system
  • Easily maintained
  • Wide range of application temperatures +10 °C - +35°C
 

Packaging

Part A : 1.60 kg plastic drum
Part B : 1.40 kg plastic jerrycan
Part C : 19.00 kg plastic lined, double paper bags

Part A + B + C : 22.0 kg ready to mix units

Colour

Part A pre-tinted : coloured liquid
Part B : brown liquid
Part C : natural grey powder

Available colours: Cream, Green, Light Grey, Grey, Red.

Custom colour matching is available upon request. Minimum order quantities apply.
Please consult the producer for required lead times.
Colour uniformity cannot be completely guaranteed from batch to batch. Do not mix batch numbers in a single area.
Due to the technology used, colour stability of the products cannot be guaranteed when exposed to UV light.

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Polyurethane screed for concrete protection according to the requirements of EN 1504-2 for principles 5 (PR) and 6 (CR) as a Coating (C) and Conforms to the requirements of EN 13813: 2002.

Certified as suitable for use in food and beverage facilities that operate in accordance with a HACCP based food safety programme, dated 10 December 2020.

All other values indicated are internal test results.
Product Information

Composition

Part A : Water borne polyol and pigments
Part B : Isocyanate
Part C : Aggregates, cement and active fillers

Shelf life

Part A : 12 months from date of production. Protect from freezing
Part B : 12 months from date of production. Protect from freezing.
Part C : 6 months from date of production. Protect against humidity.

Storage conditions

Stored properly in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between +20 °C and +30 °C.

Density

Part A~1.07 kg/L
Part B~1.24 kg/L
Part C~1.58 kg/L
Part A+B+C mixed~1.97 ± 0.03 kg/L
Technical Information

Shore D Hardness

80 - 85

Compressive strength

28 days> 39 N/mm2
28 days> 44 N/mm2

Tensile strength in flexure

28 days

> 8.1 N/mm2

28 days> 8 N/mm2

Tensile adhesion strength

> 2.0 N/mm2

(failure in concrete)

(1.5 N/mm2 is the minimum pull out strength of the recommended concrete substrate)

Reaction to fire

Class B(fl) S1

Chemical resistance

Resistant to many chemicals. Please ask for a detailed chemical resistance table.

 

Permeability to water vapour

To Water Vapour :
(4.3 mm)

~0.104 g/h/m2

Temperature resistance

The product is designed to withstand thermal shock caused by steam cleaning when thickness is 9 mm or more.
Resistance to Thermal Shock

Pass

No cracks and / or delamination

Skid / slip resistance

Substrate

SRV Dry

SRV Wet

Sikafloor®-29 PurCem® LP overcoated with Sikafloor®-31 PurCem® LP

65

40

TRRL Pendulum, Rapra 4S Slider

Application

Application Information

Mixing ratio

Part A : B : C = 1 : 1 : 11.7 (packaging size = 1.50 : 1.50 : 19.00) by weight

Ambient air temperature

+10 °C min. / +35 °C max.

Layer thickness

3 mm min. / 9 mm max.

Relative air humidity

85 % max.

Dew point

Beware of condensation!
The substrate and uncured floor must be at least 3 °C above dew point to reduce the risk of condensation or blooming on the floor finish.

Substrate temperature

+10 °C min. / +35 °C max

 

Substrate moisture content

≤ 4 % pbw – as required by the primer
Test method: Sika®-Tramex meter (equipment limited to < 6 %), CM - measurement or Oven-dry-method.

Sikafloor®-20 PurCem® LP screed and detailing mortar Sikafloor®-29 PurCem® LP can withstand moisture vapour transmission values of around 12 lbs/1000 ft2 tested according to ASTM F 1869 Anhydrous Calcium Chloride test.

Always confirm substrate moisture content prior to the application.
Refer to System Structure and options for substrate priming.

Pot Life

TemperatureTime
+10 °C~40 - 50 min
+20 °C~25 - 30 min
+30 °C~15 - 20 min
+35 °C~10 - 15 min

Curing time

TemperatureFoot TrafficLight TrafficFull Cure
+10 °C~30 h~48 h~7 d
+20 °C~18 h~36 h~5 d
+30 °C~12 h~24 h~3 - 4 d
+35 °C~10 h~20 h~3 - 4 d

Note: Times are approximate and will be affected by changing ambient and substrate conditions.
Consumption

Consumption

Primer:
Sikafloor®-161 HC as primers. It is also possible to use Sikadur®-732
(Consumption may vary depending on substrate conditions)
Always apply on to tacky primer. Re-prime if allowed to cure.
Coving and detailing mortar 3 - 9 mm.

Sikafloor®-29 PurCem® LP (part A+B+C) ~2.0 kg/m²/mm layer thickness.
These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.
Application steps

MIXING

Material and ambient temperature will affect the mixing process.
If necessary, condition the materials for best use to 20 °C – 28 °C.
Homogenise part A with a low speed electric stirrer and then add part B and premix part A and B separately for 30 seconds. Make sure all pigment is uniformly distributed.
Use a double paddle (axis) mixer for best results and gradually add part C (aggregate) to the mixed resin parts over a period of 15 seconds. DON’T DUMP it !
Allow part C to blend for further 2 minutes minimum, to ensure complete mixing and a uniform moist mix is obtained. During the operations, scrape down the sides and bottom of the container with a flat or straight edge trowel at least once (parts A+B+C) to ensure complete mixing. Mix full units only.
When adding aggregate to prepare a patching / levelling mortar, gradually add the 6 kg of 2 - 3 mm dry quartz sand immediately after mixing the full set.
Start the pan mixer and gradually add part C (aggregate) to the mixed resin parts over a period of 15 seconds. DON’T DUMP!
Use a low speed electric stirrer (300-400 rpm) for mixing parts A and B. For preparation of the mortar mix use a pan type revolving mixer.

 

APPLICATION

Prior to application, confirm substrate moisture content, r.h. and dew point.

If moisture content is > 6 % pbw, Sikagard®-720 EpoCem® can be applied as T.M.B. (temporary moisture barrier) system prior to priming with Sikafloor® -155 WN, Sikafloor® -161 HC or Sikadur®-732 on vertical surfaces.

Primer coat.
Mix and apply the primer according to its corresponding Product Data Sheet, using a brush or roller to provide uniform coverage. The primer must be tacky during the application of Sikafloor®-29 PurCem® LP. Mix and apply only the amount of primer which can be overlaid before it cures. If the primer becomes glossy or looses tackiness, remove any surface contaminates, then recoat with additional material.

Mortar
Apply the mixed Sikafloor®-29 PurCem® LP onto the ready primed substrate and compact to the appropriate thickness, then finish the detailing profile with a coving trowel or steel float. Apply Sikafloor®-29 PurCem® LP while the primer is still tacky. If the primer becomes tack free, reapply the primer. A light brushing while the mortar is still workable will close any surface voids. Allow a minimum 24 hour cure period at 20 °C. (See Waiting time / Overcoating)
For maximum sealing of the cove, application must be performed with one or two coats of Sikafloor®-31 PurCem® LP to seal the surface and improve aesthetics.

Waiting Time / Overcoatability

Allow primer to become tacky. Re-prime if allow to cure.
See “Substrate Humidity” for suitable type.
Before any subsequent application on Sikafloor®-29 PurCem® LP allow:

TemperatureMinimumMaximum
+10 °C36 h72 h
+20 °C24 h48 h
+30 °C12 h24 h
+35 °C8 h24 h

Times are approximate and will be affected be changing ambient and substrate conditions, particularly temperature and relative humidity.

CLEANING OF EQUIPMENT

Clean all tools and application equipment with Thinner C immediately after use.
Hardened/cured Sikafloor®-29 PurCem® LP can only be mechanically removed.

CLEANING

To maintain the appearance of the floor after application, Sikafloor®-29 PurCem® LP must have all spillages removed immediately and must be regularly cleaned using rotary brushes, mechanical scrubbers, scrubber dryers, high pressure washers, wash and vacuum techniques, etc., using suitable detergents and waxes.

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