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Sikafloor PurCem HS-21

Sikafloor PurCem HS-21

Screeds
SIKA

Sika is a global leader in specialty chemicals for the construction and industrial sectors. The company develops and supplies innovative products and systems for bonding, sealing, damping, reinforcing, and protecting structures. With a strong focus on sustainability and performance, Sika serves a wide range of applications including concrete production, waterproofing, roofing, flooring, and structural strengthening.

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General Specifications
Packaging See Product Data Sheet
Usage Food plants, freezers, thermal-shock areas; labs, workshops
Chemical Base -
Usage Area -
Color Beige, maize yellow, oxide red, grass green, pebble grey, dusty grey, slate grey, traffic grey
Storage Conditions Please refer to the individual Product Data Sheet
Density -
Consumption Layer Product Consumption 1; Scratch coat Sikafloor®-21 PurCem® (AE) ~2.9 kg/m 2 (1.5 mm) 2
Application Thickness -
Ambient Air Temperature -
Substrate Temperature -
Waiting Time -

Self-smooting, medium to heavy duty, matt finish polyurethane cement hybrid flooring system

Sikafloor® PurCem® HS-21 system is made with polyurethane cement technology and is part of the Sikafloor® PurCem® flooring range. The Sikafloor® PurCem® HS-21 system is especially designed to withstand chemical attack, high impact and can be used in wet and dry processing plants. The system is composed of an highly durable polyurethane cement body coat, it has an aesthetic, easy to clean and smooth surface, providing medium slip resistance. Is typically installed at 4 to 6 mm (0.236 in) thick. Suitable for use in hot and tropical climatic conditions.

Usage
  • Food processing plants, in wet or dry process areas, freezers and coolers, thermal shock areas
  • Chemical plants
  • Laboratories
  • Workshops
Advantages
  • High chemical resistance. Resists a wide range of organic and inorganic acids, alkalis, amines, salts and solvents
  • Good resistance to fire
  • High mechanical and abrasion resistance
  • Easy application
  • Easy to clean and maintain
  • Seamless, non taint, odourless
  • Smooth, matt surface
  • Tolerant to moisture in the substrate
  • Very good life cycle cost performance
Packaging

Please refer to the individual Product Data Sheet

Colour

Beige, maize yellow, oxide red, grass green, pebble grey, dusty grey, slate grey, traffic grey

Appearance

Smooth surface, matt finish

Typical Product Data
APPROVALS / CERTIFICATES

- Certified as suitable for use in food and beverage facilities that operate in accordance with a HACCP based Food Safety Programme.
- Compliant with USDA flooring requirements
- Canadian Food Inspection Agency acceptance for use in food plants in Canada.
- British Standards Specifications (BSS) acceptance for use in the UK. 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

Shelf life

Please refer to the individual Product Data Sheet

Storage conditions

Please refer to the individual Product Data Sheet

System Structure

Sikafloor® PurCem® HS-21
Layer Product
1. Scratch coat Sikafloor®-21 PurCem® (AE)
2. Body coat Sikafloor®-21 PurCem® (AE)
As optional primers Sikafloor®-161 + quartz sand 0.4–0.8 mm (0.0157–0.0315 in) broadcast to excess can be used. Please refer to the individual Product Data Sheet.

Composition

Water-based polyurethane cement hybrid

Nominal Thickness

~4 - 6 mm (~0.157 - 0.236 in)

Volatile organic compound (VOC) content

Very low content of volatile organic compounds, it fulfils the stringent demands for indoor air quality and low VOC emitting products AgBB.

Shore D Hardness

~80-85

Abrasion Resistance

Class “Special” Severe abrasion resistance
AR 0.5
Class A6
< 900 mg (H-22 / 1000 / 1000)

Resistance to Impact

Class III (≥ 20 Nm)
2 pounds / 30 inches (3 mm (0.118 in) thick)

Compressive Strength

> 40 N/mm 2 (5802 psi) after 28 d at +23 °C (+73 °F) / 50 % r.h. (BS EN 13892-2)

Tensile Adhesion Strength

Concrete failure (EN1542)

Reaction to Fire

B fl -s1 (EN 13501-1)

Chemical Resistance

Please refer to Sikafloor® PurCem® chemical resistance guide. Contact Sika technical service for specific information.

Temperature Resistance

4 mm (0.157 in) 6 mm (0.236 in)
-15 °C (59 °F) to +70 °C (+158 °F) -25 °C (77 °F) to +80 °C (+176 °F)
The product is resistant to short term contact with temperatures of +90 °C (+194 °F), mainly during the cleaning regimes.

Application
Applied Product Ready for Use
TemperatureFoot traffic Light traffic Full cure
+10 °C (+50 °F)~20 h ~34 h ~7 d
+20 °C (+68 °F)~12 h ~16 h ~4 d
+30 °C (+86 °F)~8 h ~14 h ~3 - 4 d

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

Consumption
LayerProduct Consumption
1. Scratch coatSikafloor®-21 PurCem® (AE) ~2.9 kg/m 2 (1.5 mm (0.0591 in))
2. Body coatSikafloor®-21 PurCem® (AE) ~1.9 kg/m 2 /mm

Consumptions are theoretical and do not include any wastage, additional material need due to porosity, substrate profile etc.

CLEANING

Please refer to Sikafloor®- Cleaning Regime.