Sikafloor®-21 PurCem® (AE)
Sikafloor®-21 PurCem® (AE) is a multi-component, water-based coloured polyurethane hybrid screed with self-smoothing properties. It has a smooth, matt, impervious, hard wearing surface and is typically installed at 3 - 6 mm thickness. Suitable for use in hot and tropical climatic conditions.
- Very good chemical resistance
- High mechanical resistance
- High glass transition point
- Non tainting /odourless
- Can be applied to substrates with high moisture content (7 days old or mature damp concrete)
Usage
Sikafloor®-21 PurCem® (AE) is used as a scratch coat primer, basecoat and wear coat layer in Sikafloor®PurCem® system build ups, in areas of medium to heavy loading, high chemical exposure and abrasion.Advantages
- Very good chemical resistance
- High mechanical resistance
- High glass transition point
- Non tainting /odourless
- Can be applied to substrates with high moisture content (7 days old or mature damp concrete)
Packaging
| Part A | 5.00 kg plastic jerrycan |
| Part B | 5.00 kg plastic jerrycan |
| Part C | 21.80 kg plastic lined, double paper bags |
| Part D | 1.6 kg plastic pouch |
Part A + B + C + D: 33.4 kg ready to mix units
Colour
| Part A | White liquid |
| Part B | Brown liquid |
| Part C | Natural white powder |
| Part D | Colourpack as per list below |
Standard colours: Stone grey, beige, grass green, oxide red.
Other colours upon request: Traffic grey, maize yellow, slate grey.
Product Details
SUSTAINABILITY
LEED Rating
- Complies AgBB for use in in indoor environment. Test report No. G10004B.
- Sikafloor®-21 PurCem® (AE) is certified according "Low Emitting Materials as per Al Sa'fat - Dubai Green Building Evaluation System" by Dubai Central Laboratory (DCL) certificate No. CL17020432
APPROVALS / CERTIFICATES
- EN1186, EN 13130, and prCEN/TS 14234 standards, and the Decree on Consumer Goods, representing the conversion of directives 89/109/EEC, 90/128/EEC and 2002/72/EC for contact with food stuffs, according to test report by ISEGA, 32758 U11 and 32759 U11, both dated December 6th, 2011. (Tests performed on Sikafloor® -20/21/22/29 and 31 PurCem® in standard and LP versions).
- Campden and Chorleywood Food Research Association, reference S/REP/125424/1a and 2a, dated 8th February, 2012.
- Fire classification report according to EN 13501-1 from Exova Warrington Fire for Sikafloor®-21 PurCem® No.317047, dated 24th of March, 2012.
- Liquid water transmission rate test report from the Technology Centre, reference 15456 dated January 25th, 2012.
- Abrasion resistance tests performed by Face Consultants Ltd., according to BS 8204-2:2003, report reference FC/12/3850, dated January 17th, 2012. (Tests performed on Sikafloor® -20/21 PurCem®).
- Thermal expansion coefficient and freeze-thaw cycle resistance performed at RWTH / IBAC, report nº M-1614 dated May 29th, 2012.
Composition
Water-based polyurethane cement hybrid
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. Must be protected from humidity. |
| Part D | 12 months from date of production. Protect from freezing. |
Storage conditions
Original, unopened and undamaged sealed packaging, in dry conditions at temperature between +5 °C and +30 °C. Protect from direct sunlight, heat and moisture.
Density
Part A + B + C + D mixed: ~1.93 kg/l (+20 °C)
Shore D Hardness
| ~80–85 | (ASTM D 2240) |
Compressive Strength
| ≥ 40 N/mm2 (28 d / +23 °C / 50 % r.h.) | (BS EN 13892-2) |
Tensile Strength in Flexure
| ~10 N/mm2 (28 d / +23 °C / 50 % r.h.) | (BS EN 13892-2) |
Tensile Adhesion Strength
| Concrete failure | (EN 1542) |
Application
Mixing Ratio
Mix full units only
Ambient Air Temperature
+10 °C min. / +30 °C max.
Layer Thickness
Scratch coat: 1 - 2 mm
Base and wear coat: 3 - 6 mm
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 other disturbance of the surface on the floor finish.
Substrate Temperature
+10 °C min. / +30 °C max.
Substrate Moisture Content
Can be installed on substrates with higher moisture content. No ponding water. Check rising moisture. The substrate needs to be visibly dry and have adequate pull-off strength min 1.5 N/mm2.
Pot Life
| Temperatures | Time |
| +10 °C | ~35 - 40 min |
| +20 °C | ~22 - 25 min |
| +30 °C | ~15 - 18 min |
| +35 °C | ~12 - 15 min |
Consumption
~1.93 kg/m2/mm
Consumptions are theoretical and do not include any wastage, additional material need due to porosity, substrate profile etc.
MIXING
Premix Part A with a low speed electric stirrer and then add Part B and mix for 30 seconds. For the colourpack version, premix Part A neutral with a low speed electric stirrer and add Part D to it. Mix until a uniform colour is achieved. Add Part B and mix for 30 seconds.
Use a double paddle (axis) mixer and gradually add Part C (aggregate) to the mixed resin. 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.
Mixing Tools
Use a low speed electric stirrer (300 - 400 rpm) for mixing parts A and B. For preparation of the mortar mix use a double paddle mixer.
APPLICATION
Prior to application, confirm substrate moisture content, relative humidity and dew point. As a scratch coat Sikafloor®-21 PurCem® (AE) can be applied using a steel trowel. As a body coat Sikafloor®-21 PurCem® (AE) can be applied using a toothed trowel or pin screed, to the desired thickness, or a steel trowel. Remove air with a spike roller.
For further details please refer to the related system data sheet.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with Thinner C immediately after use. Hardened / cured material can only be mechanically removed.