Product Data Sheet Show all documents

Sikafloor®-24 PurCem CN

Medium duty self-levelling polyurethane screed for hygenic area

Sikafloor®-24 PurCem CN is self-levelling, medium duty, coloured, four-part, odourless, water dispersed polyurethane-based / cement and aggregate screeds designed to provide good resistance to abrasion, impact,chemical attack and other physical aggression. Sikafloor®-24 PurCem CN has an aesthetic, easy to clean, smooth aggregate texture. The system is typically installed at 2 to 6 mm thickness.

  • 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 -20°C up to 80°C.
  • Bond strength in excess of the tensile strength of concrete, concrete will fail first.
  • 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.
  • Easily maintained.
Product Data Sheet Show all documents

Usage

  • Typically used in food processing plants, wet & dry process areas, freezers & coolers, dairies, breweries, wineries, distilleries, laboratories, chemical process plants, pulp and paper plants, warehouses and storage areas.

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 -20°C up to 80°C.
  • Bond strength in excess of the tensile strength of concrete, concrete will fail first.
  • 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.
  • Easily maintained.

Packaging

Toner versionColor paste version
Part A: 5 kg/pail

Part A: 5 kg/pail

Part B: 5 kg/pail

Part B: 5 kg/pail

Part C: 21.8 kg/bag

Part C: 23 kg/bag

Part D: 1.6 kg/bagPart D: 0.5 kg/bag
Part A+B+C+D: 33.4 kgPart A+B+C+D: 33.5 kg

Colour

Available in eight colour shades:

Beige, Maize Yellow, Oxide Red, Grass Green, Slate Grey, Dusty Grey, Traffic Grey, Sky-blue(color paste version only).

Applied colours selected from colour charts will be approximate.
Custom colors subject to minimum orders.

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

LEED® Rating

  • Confirms Section FQ (Indoor Environment Quality), Credit 4.2 Low Emitting Material Paints and Coatings (VOC content ≤ 50 g/L).
  • Sikafloor®-24 PurCem CN is listed on the Eco-Product Directory as environmentally friendly product choice for green building initiatives. (Application No : PL-01396-2022)

APPROVALS / STANDARDS

  • HACCP approved material
  • Synthetic resin screed material according to EN13813:2002, Declaration of Performance 02 08 02 02001 0 000017 1088, certified by notified factory pro-duction control certification body 0086, certificate ofconformity of the factory production control 541325,and provided with the CE marking.
  • Coating for surface protection of concrete accordingto EN 1504-2:2004, Synthetic resin screed materialaccording to EN 13813:2002, Declaration of Perform-ance 02 08 02 02 001 0 000017 1088, certified by no-tified factory production control certification body0086, certificate of conformity of the factory produc-tion control 541325, and provided with the CE marking.
  • EN1186, EN 13130, and prCEN/TS 14234 standards,and the Decree on Consumer Goods, representingthe conversion of directives 89/109/EEC, 90/128/EECand 2002/72/EC for contact with food stuffs, accord-ing to test report by ISEGA, 32054 U11 and 32759U11, both dated August 16th, 2012. (Tests per-formed on Sikafloor® -24N PurCem® (CN) version).
  • Slip resistance properties according to DIN 51130tested at MPI (Materialprüfung und Entwicklung),test reports refs. Nº 12-6638-S/12 dated August 7th,2012.
  • Slip resistance properties according to DIN 51130tested at MPI (Materialprüfung und Entwicklung),test reports refs. Nº 12-6638-S/12 dated August 7th,2012.
Product Information

Chemical Base

Waterborne polyurethane composite mortar

Shelf Life

Part A & B12 months
Part C & D6 months

Storage Conditions

The product must be stored in original, unopened and undamaged sealed packaging in dry conditions, protect from direct sunlight and frost. Always refer to packaging.

Density

Mixing Units~ 1.93 kg/L

Volatile Organic Compound (VOC) Content

< 30 g/LJC/T 2327-2015
Technical Information

Shore D Hardness

~80JC/T 2327-2015

Abrasion Resistance

< 0.15 gJC/T 2327-2015

Resistance to Impact

Heavy duty (1000g)JC/T 2327-2015

Compressive Strength

24 hours~27 MPa
7 days~37 MPa
28 days~40 MPa

Tensile Strength in Flexure

~14.7 MPaJC/T 2327-2015

Tensile Strength

~6.5 MPaJC/T 2327-2015

Tensile Adhesion Strength

≥ 2.0 MPa (failure in concrete)JC/T 2327-2015

Chemical Resistance

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

Application

Application Information

Mixing Ratio

Parts A:B:C:D= Mix full units only.

Ambient Air Temperature

+10 °C min./+30°C max.
Optimal application temperatures range : 15°C - 25°C

Relative Air Humidity

80% r.h. max.

Dew Point

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

Substrate Temperature

+10°C min. / +30°C max.

Substrate Moisture Content

< 4% pbw moisture content.
Test method: Sika®-Tramex meter or CM - measurement.
No rising moisture according to ASTM (Polyethylene-sheet).

Pot Life

TemperatureTime
+20 °C~25 minutes

Curing Time

Temperature/ThicknessFoot trafficLight trafficFull cure
+20°C / 4mm10~12 hours14~16 hours5 days

Note:At low temperature the curing need longer time.

Waiting Time / Overcoating

Before applying Sikafloor®-24 PurCem CN on Sikafloor®-24 PurCem CN allow:

Substrate temperatureMinimumMaximum
+10°C~24 hours~12 days
+20°C~12 hours~7 days
+30°C~~6 hours~4 days

Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.
Consumption

Consumption

Coating SystemProductConsumption
PrimerSikafloor®-24 PurCem CN1.5 - 2.0 kg/m²/mm
Seal coatSikafloor®-24 PurCem CN~2.0 kg/m²/mm

Note:These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level and
wastage etc.
Application steps

EQUIPMENT

Sikafloor®-24 PurCem CN must be thoroughly mixed using a low speed electric stirrer (400 -600rpm) or other suitable equipment.

MIXING

  • Premix parts A and B separately, make sure all pigment is uniformly distributed.
  • Start mixer; stir for 20 seconds part A, then add part B and mix for 30 seconds. Add part C (powder) and part D (color part) together, pouring slowly over a period of 15 seconds.
  • Allow part C and D to further mix for 2 more minutes to ensure complete mixing. 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+D) to ensure complete mixing. Mix full units only.

APPLICATION

  • Primer: Mix and pour the Sikafloor®-24 PurCem CNmaterials on the floor. Spread to the desired thickness using a notched squeegee or screed bar.
 
  • Seal coat: Mix and pour the Sikafloor®-24 PurCem CN materials on the floor. Spread to the desired thickness using a notched squeegee, trowel or screed bar. Take care to spread newly mixed materials across the transition of previous applied mixes before the surface begins to set. Immediately spike roll the surface to release trapped air in the matrix.

CLEANING OF TOOLS

Clean all tools and application equipment with Thinner C or Sika® Remover-208 immediately after use. Hardened / cured material can only be mechanically removed.

CLEANING

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.

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