Nitoflor PU600: Cementitious Polyurethane Floor Topping

Overview

Nitoflor PU600 is a high-performance, self-levelling polyurethane cement industrial floor topping engineered for demanding flooring applications in industrial and commercial environments. As a polyurethane-based coating system, it functions as a basecoat and serves multiple roles within multi-component flooring systems, including as an undercoat for Nitoflor PU200 and as a broadcast aggregate base in flooring applications.

Key Features and Advantages

Nitoflor PU600 is specifically designed to deliver exceptional performance across multiple dimensions:

• Handles extreme temperatures with thermal resistance capabilities up to 100°C
• High chemical resistance to organic and inorganic acids, alkalis, amines, salts and solvents
• Hard wearing and abrasion resistant providing durable surface protection
• Low odour and non-tainting during application
• Fast turnaround times enabling quick project completion
• Anti-microbial properties that reduce bacterial and mould growth
• Very good slip resistance properties when aggregates are broadcast onto the surface
• HACCP certified for use in food handling areas such as kitchens and production areas
• RCS (Respirable Crystalline Silica) Hazard Free classification

Typical Applications

Nitoflor PU600 has been designed to produce flooring for applications that require high resistance to mechanical stress and chemical attack. Typical uses include:

• Wet processing zones in chemical processing plants
• Food preparation and manufacturing areas
• Chemical storage facilities
• Industrial plant rooms
• Warehousing and manufacturing zones

Technical Specifications

Physical Properties

The following results were obtained in controlled laboratory conditions at 20°C and 50% relative humidity:

Property	Specification
Bond Strength	Greater than cohesive strength of 25MPa concrete; >1.5 MPa (EN1542)
Compressive Strength	> 50 MPa (AS1478)
Flexural Strength	23.1 MPa (AS1012.11)
Hardness	80 Shore D (ASTM D2240)
Coefficient of thermal expansion	3.5 x 10⁻⁵ / °C (ASTM C351)
Water Absorption	0.8% @ 80°C (ASTM D570)
Impact Resistance	1.8kg / 110cm (ASTM D2794)
Density	1.735 g/cm³
VOC Content	25 g/litre (ASTM D3960)

Chemical Resistance

Nitoflor PU600 provides good resistance to a wide spectrum of organic and inorganic acids, alkalis, amines, salts and solvents. Specific resistance data should be confirmed with Fosroc, including dilution percentage and temperature considerations.

Cure Times

Condition	Time
Light traffic	36 hours @ 10°C; 24 hours @ 20°C; 12 hours @ 30°C
Full traffic	72 hours @ 10°C; 48 hours @ 20°C; 24 hours @ 30°C
Full chemical cure	12 days @ 10°C; 7 days @ 20°C; 5 days @ 30°C

Pot Life and Application Parameters

• Pot Life: Approximately 15 minutes at 25°C
• Application Temperature Range: 10 to 30°C (ambient)
• Minimum Concrete Strength: 25 MPa

Temperature Resistance

Nitoflor PU600 is designed for application at different thicknesses depending on physical site parameters and temperature resistance requirements:

Application Type	Thickness	Service Temperature	Max. Cleaning Temperature	Thermal Shock Range
Dry Process (Smooth)	3 mm	-15°C to 65°C	80°C	-15°C to 80°C
Dry Process (Slip Resistance)	3-4 mm	-15°C to 65°C	80°C	-15°C to 80°C
Chemical Storage/Loading & Unloading	4-5 mm	-20°C to 90°C	90°C	-20°C to 90°C
Wet Process/Cold Rooms	6 mm	-25°C to 100°C	100°C	-25°C to 100°C

Slip Resistance Ratings (AS4586)

When used with appropriate aggregates and topcoats, Nitoflor PU600 achieves excellent slip resistance:

Basecoat	Broadcast Aggregate	Topcoat	Wet Pendulum	Oil Wet Ramp
Nitoflor PU600	Nil	Nitoflor PU200	P4	-
Nitoflor PU600	Nitoflor Anti-Slip Grains 01	Nitoflor PU200	P5	R11
Nitoflor PU600	Nitoflor Anti-Slip Grains 21	Nitoflor PU200	P5	R13

System Composition and Components

18.1kg Kit Contents (10.5 litres mixed)

• Part A Base: 2.6 kg
• Part B Hardener: 2.8 kg (Shelf life: 18 months from manufacture)
• Part C Fillers: 12.4 kg (Shelf life: 24 months from manufacture)
• Colour Pigment (optional): 0.3 kg

72.4kg Kit Contents (41.85 litres mixed)

• Part A Base: 10.4 kg
• Part B Hardener: 11.2 kg (Shelf life: 18 months from manufacture)
• Part C Fillers: 12.4 kg × 4 (Shelf life: 24 months from manufacture)
• Colour Pigment (optional): 1.2 kg

Coverage Specifications

Coverage varies based on application thickness:

Kit Size	Thickness	Coverage	Consumption Rate
18.1 kg	3-4 mm	~3.5 m²	5.2 kg/m²
18.1 kg	5-6 mm	~2.1 m²	8.8 kg/m²
72.4 kg	3-4 mm	~14 m²	5.2 kg/m²
72.4 kg	5-6 mm	~8.4 m²	8.8 kg/m²

Note: Coverage figures are theoretical; practical coverage will be reduced due to wastage factors and substrate variations.

Anti-Slip Aggregate Integration

Nitoflor PU600 works with anti-slip aggregate systems:

• Nitoflor Anti-Slip Grains 01: Applied at 3 to 4 kg/m² providing R11 slip rating
• Nitoflor Anti-Slip Grains 21: Applied at 3 to 4 kg/m² providing R13 slip rating

The broadcast aggregates are applied immediately after spike rolling, creating enhanced slip resistance when encapsulated with Nitoflor PU200 topcoat.

Color Variants and Light Reflectance Values

Nitoflor PU600 is available in multiple color options (using Nitoflor PU Colour Pigments):

Color Variant	Light Reflectance Value (LRV)
Bright Blue	16.92%
Curtain Call	12.50%
Jade	12.89%
Oatmeal	46.41%
Pipeline Grey	28.08%
Red Oxide	7.94%
Sunflower	32.97%

Application Method

Preparation Requirements

• Concrete substrate minimum strength: 25 MPa
• Substrate must be free from coatings and contaminants
• Substrate dry to less than 95% relative humidity
• Requires effective damp-proof membrane and be free from rising damp
• All cementitious laitance must be removed via shot blasting and/or scarification

Application Process

The Nitoflor PU600 topping is spread onto a primed floor using a steel trowel or gauging rake immediately after mixing. The process involves:

1. Mixing all components thoroughly
2. Spreading to required thickness on primed floor
3. Immediate spike rolling to release entrapped air (within 8 minutes)
4. Broadcasting slip-resistant aggregate to full cover
5. Allowing cure time (minimum 5 hours @ 25°C)

Substrate Compatibility

Nitoflor PU600 functions as a basecoat in comprehensive flooring systems:

• Applied directly to concrete substrates
• Can function as a single-layer system when sealed with Nitoflor PU200
• Serves as foundation for multi-layer systems requiring additional protection
• Bond strength greater than 3 MPa with Nitoflor PA, demonstrating suitability as a reliable base for subsequent coating applications

Storage Requirements

• Store in cool, dry conditions between 5°C and 30°C
• Store in original, unopened packs
• Part B Hardener: 18 months shelf life from manufacture
• Part C Fillers: 24 months shelf life from manufacture
• High temperatures and/or high humidity may reduce shelf life

Standards Compliance

• AS/ISO 9239.1-2003: Reaction to Fire Tests for Floorings
  • Critical Heat Flux (CHF): ≥11.0 kW/m²
  • Smoke Value: 28% (min)
• HACCP Certification: Approved for use in food handling areas (SSZ - Splash or Spill Zone)

Limitations and Considerations

• Not colour fast: May exhibit yellowing over time depending on UV light and heat exposure
• Not suitable for deep freezing or steam-only cleaning
• When cleaning at 100°C, use steam and hot water blend
• Colour change does not compromise product performance or chemical resistance
• Colour uniformity requires using components with identical batch numbers
• Should only be applied by specialist contractors recognized by Fosroc

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References

• [1] Fosroc_Nitoflor_PU600_TDS.pdf
• [2] Fosroc_Nitoflor_PU200_TDS.pdf