Nitoband Bond Breaker Sealing System: Technical Details, Specifications, and Features

System Overview

The Nitoband System is a superior bond breaker sealing solution designed specifically for critical movement zones in waterproofing applications. It functions as an innovative alternative to traditional bond breaking methods, eliminating the need for conventional sealant beads and backing rod techniques. The system is manufactured by Fosroc and is used in conjunction with Nitoproof water-based liquid applied waterproofing membranes for internal, external, underground, and fully immersed applications.[10]

Key Components

The Nitoband System comprises several integrated components:

Primary Component: Nitoband Tape

Nitoband Tape serves as the main sealing element—a nitrile butadiene rubber (NBR) flexible bond breaking tape with a polyester fabric carrier surface designed to embed into Nitoproof water-based liquid membranes. The tape measures 120mm wide by 10m in length, with a 70mm span of rubber centrally positioned. It is specifically engineered as a wet area grade elastic joint band for waterproofing critical movement zones within internal and external wet areas.[10]

Accessory Components

The system includes pre-fabricated corner solutions:

• 270° External Corners - for exterior corner intersections
• 90° Internal Corners - for interior corner applications
• Adjustable Internal Corners - for flexible corner configurations
• Pipe Penetration Detailing Squares - available in three size variations suitable for pipe diameters ranging from 6mm to 150mm[10]

Physical Properties and Technical Specifications

The Nitoband System demonstrates robust material characteristics suitable for demanding waterproofing applications:

Property	Specification
Form	Thermoplastic elastomer with non-woven polypropylene fleece
Color	Blue
Thickness	0.66mm
Weight	364g/m²
Tensile Strength (lateral)	25N/15mm (DIN EN ISO 527-3)
Tensile Strength (longitudinal)	120N/15mm (DIN EN ISO 527-3)
Elongation at Break (lateral)	300% (DIN EN ISO 527-3)
Elongation at Break (longitudinal)	70% (DIN EN ISO 527-3)
Temperature Resistance	-30°C to +90°C
UV Resistance	≥500 hours (DIN EN ISO 4892-3)
Moisture Vapor Resistance (sd)	16m (DIN EN 1931)
Water Pressure Resistance	≥1.5 bar (DIN EN 1928 Ver. B)
Burst Pressure	2.0 bar

[10]

Chemical Resistance

The Nitoband System exhibits excellent chemical resistance to common substances encountered in waterproofing environments:

• Lactic acid (5%)
• Citric acid (100g/L)
• Hydrochloric acid (3%)
• Sulphuric acid (35%)
• Potassium hydroxide (3%/20%)
• Sodium hypochlorite (0.3g/L)
• Sea water (20g/L sea water salt)

[10]

Standards Compliance

The Nitoband System meets critical waterproofing industry standards:

• AS 3740 - Australian standard for waterproofing
• AS 4858 and AS 4654 - Standards for membrane systems (Class I, Class II, and Class III compliant)

[10]

Functional Advantages

Superior Bond Breaking Performance

The Nitoband System performs a dual waterproofing function by:

• Preventing adhesion between the membrane and substrate at critical movement zones
• Accommodating longitudinal and lateral movement without compromising seal integrity
• Providing high elongation and movement capabilities to withstand joint movement in both directions

[10]

Time-Efficient Installation

Unlike traditional methods requiring sealants to cure before proceeding, the Nitoband System offers simplified, time-efficient installation without waiting periods for joint sealants to skin and cure sufficiently.[10]

High-Strength Composition

The system features a high strength rubber composition with:

• Superior water resistance
• Chemical resistance
• Tear resistance
• Waterproof properties in its own right, offering double protection when combined with Nitoproof membranes

[10]

Installation Method

The installation process involves embedding the system into wet Nitoproof membrane:

1. Apply a liberal coat of selected Nitoproof liquid applied membrane to internal and external corner intersections (approximately 150mm wide)
2. Embed Nitoband Corners into the wet membrane with full saturation of fabric edges
3. Measure and cut Nitoband Tape for all wall/floor and wall/wall junctions with minimum 50mm overlap onto corners
4. Apply liberal coat of liquid membrane to junction surfaces (approximately 150mm wide)
5. Embed pre-cut Nitoband Tape into the wet membrane, ensuring full saturation and removing air pockets and voids

[10]

Design Criteria

Successful implementation requires:

• Substrates must be suitably prepared, clean, sound, stable, and free of protrusions
• Surfaces must be primed according to substrate type with either Nitoprime 115 (non-porous substrates) or Nitoprime 120 (porous masonry surfaces)
• Nitoband tape, corners, and accessories are installed before Nitoproof water-based liquid membranes
• The fleece is designed to embed into Nitoproof membranes, ensuring full adhesion for superior sealing in critical areas

[10]

Application Scope

The system is suitable for:

• Internal wet areas
• External wet areas
• Underground applications
• Fully immersed conditions
• Critical movement zones requiring superior sealing protection

[10]

Key Differentiators from Traditional Methods

The Nitoband System eliminates traditional approaches by:

• Replacing conventional sealant bead applications
• Eliminating backing rod requirements
• Providing integrated corner solutions without separate fabrication
• Offering waterproof integrity in its own right
• Delivering time-efficient installation compared to sealant curing processes

[10]

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References

• [1] Fosroc_Nitoband_TDS.pdf