Sikafloor®-24 PurCem®
Sikafloor®-24 PurCem® is a Food grade approved, fast turn around, water-based coloured polyurethane hybrid that can produce a smooth or textured, matt, impervious and hard wearing surface. Sikafloor®-24 PurCem® is typically installed at 1.5–3.0 mm thickness. It is designed to be used as new floor or for fast refurbishment of existing resin based floors.
- Fast cure - short down time
- HACCP - Food grade approval
- Good chemical resistance
- High mechanical resistance
- High glass transition point
- Non tainting /odourless
- Low VOC
- Can be applied to substrates with high moisture content (7 days old or mature damp concrete or 10% moisture pbw)
Usage
- Food and Beverage processing -dry or wet areas
- Food facilities - Re sufacing/refurbishing existing seamless floors
- Engineering process areas
- Warehouse logistics
- Manufacturing facilities.
- Warehouse floor refurbishment.
Advantages
- Fast cure - short down time
- HACCP - Food grade approval
- Good chemical resistance
- High mechanical resistance
- High glass transition point
- Non tainting /odourless
- Low VOC
- Can be applied to substrates with high moisture content (7 days old or mature damp concrete or 10% moisture pbw)
Packaging
| Sikafloor®-24 PurCem® | Full kit |
| Part A (neutral) | 2.80 kg plastic container |
| Part B | 3.00 kg plastic container |
| Part C | 9.00 kg plastic bag |
| Part D Pigment | 0.4 kg plastic tub |
Part A (neutral)+B+C+D: 15.2 kg (8.5L) ready to mix units
Colour
| Sikafloor®-24 PurCem® | |
| Part A (neutral) | light beige liquid |
| Part B | brown liquid |
| Part C | natural grey powder |
| Part D | colourpack as per list below for part A neutral |
Standard RAL colours: Traffic Grey 7042, Dusty Grey 7037, Curtain Call S46B9, Oxide red 3009, Sky Blue 5015, Beige 1001
Available on request: Grass Green 6010, Maize Yellow 1006,
Product Details
SUSTAINABILITY
LEED® Rating
Confirms Section FQ (Indoor Environment Quality), Credit 4.2 Low Emitting Materials Paints and Coatings (VOC content ≤ 50 g/l).
VOC - Australian Standards ASTM D3960 - Green Star Building Council V2 IEQ-13 V1 IEQ-11
APPROVALS / CERTIFICATES
- HACCP- Food Safety Certification - Food Zone Classification: SSZ
- VOC - Aust. Standards ASTM 4586 - 2013 Green Star Building Council V2 IEQ-13 V2 IEQ-11
- Fire - Critical Radiant Fux - Pass AS/ISO 9239.1 AP VS0209
- Synthetic resin screed material according to EN 13813:2002, Declaration of Performance 02 08 02 02 001 0 000017 1088, certified by notified factory production control certification body 0086, certificate of conformity of the factory production control 541325, and provided with the CE marking.
- Coating for surface protection of concrete according to EN 1504-2:2004, Synthetic resin screed material according to EN 13813:2002, Declaration of Performance 02 08 02 02 001 0 000017 1088, certified by notified factory production control certification body 0086, certificate of conformity of the factory production control 541325, and provided with the CE marking.
- 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, 32054 U11 and 32759 U11, both dated August 16th, 2012. (Tests performed on Sikafloor® -24N PurCem® (CN) version).
- Slip resistance properties according to DIN 51130 tested at MPI (Materialprüfung und Entwicklung), test reports refs. Nº 12-6638-S/12 dated August 7th, 2012.
- 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 | 9 months from date of production. |
| Part B | 6 months from date of production. |
| Part C | 6 months from date of production. Must be protected from humidity. |
| Part D | 9 months from date of production. |
Storage conditions
The package must be stored properly in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between +5 °C and +30 °C.
Density
Part A (neutral)+B+C+D mixed: ~ 1.75 kg/l ± 0.03 (at +20 °C) 8.5 - 8.7 L volume
Abrasion resistance
1200mg loss - Taber abrasion test
Compressive strength
| ~40N/mm2 (28 days at +23°C / 50% r.h.) | (BS EN 13892-2) |
Tensile strength in flexure
| ~16 N/mm2 (28 days at +23°C / 50% r.h.) | (BS EN 13892-2) |
Tensile adhesion strength
| concrete failure >1.5Mpa | (EN 1542) |
Service temperature
Refer to Sika Technical Department for direction
Chemical resistance
Excellent resistance to a range of chemicals - Refer to Sikafloor PurCem chemical resistance chart
Application
Mixing ratio
Mix full units only.
Layer thickness
Scratch coat: 0.5-1.0mm
Base: (As smooth system) 1.5-2.0mm
Textured system: 2.0-3.0 mm
Ambient air temperature
+10 °C min. / +40 °C 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. / +40 ºC
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 minutes |
| +20 °C | ~ 22–25 minutes |
| +30 °C | ~ 15–18 minutes |
| +35 °C | ~ 12–15 minutes |
Curing time
Before overcoating Sikafloor®-24 PurCem® allow:
| Substrate temperature | Minimum | Maximum |
| +10 °C | 8-9 hours | 72 hours |
| +20 °C | 5-6 hours | 48 hours |
| +30 °C | 4-5 hours | 24 hours |
Times are approximate and will be affected be changing ambient and substrate conditions, particularly temperature and relative humidity.
If faster curing is required use Sikafloor PurCem Accelerator.
Addition rate for temps between 18-23 degrees C is 15mls per 15.2kg kit.
Consumption
~1.75 kg/m2/mm
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. Ad 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®-24 PurCem® can be applied using a steel trowel. As a body coat Sikafloor®-24 PurCem® can be applied using a toothed trowel or pin screed, or a steel trowel. Remove air with a spike roller.
If creating a PurCem HB-24 textured floor, broadcast desired grade of Silica sand or Sikafloor Broadcast B1 Bauxite to excess.
Be aware of open time to keep up with the initial set time of the Sikafloor®-24 PurCem® base.
Once sufficiently hard to accept a persons weight, remove all brodcast excess by sweeping and vacuuming.
Apply finish coats of Sikafloor 31 or 33 PurCem as per instructions of those TDS.
The mixing and placement of the the Sikafloor®-24 PurCem® base and any finish coats must be carried out strictly in accordance with application guidelines.
Failure to do so will adversely affect set times and the appearance of the finished product related to eveness and colour.
If using Sikafloor®-24 PurCem® as an overlay system on existing resin floors, observe the correct methods for preparation.
Refer to Sika Technical Dept. for direction
CLEANING OF EQUIPMENT
Clean all tools and application equipment with Thinner C immediately after use. Hardened / cured material can only be mechanically removed.