Nitoprime 115: Water-Based Primer for Non-Porous Surfaces

Product Overview

Nitoprime 115 is a specialized water-based primer specifically formulated with adhesion-enhancing properties designed for application on non-porous substrates. Manufactured by Fosroc, this product serves as a preparatory coating that enables superior adhesion of water-based membranes and coatings to surfaces that would otherwise resist paint and coating adhesion.

Key Features and Advantages

Nitoprime 115 offers several compelling advantages for construction and waterproofing applications:

• Low VOC Content: Contains only 22g per litre of volatile organic compounds, making it an environmentally friendly option
• Non-Flammable and Safe: Free of hazardous odours and solvent-based components
• Fast Drying: Achieves tack-free status in just 15 minutes at normal ambient conditions of 23°C
• Cost Effective: Provides a cost-effective alternative to grinding, etching, and solvent-based primers
• Excellent Water Resistance: Delivers robust water resistance properties after film formation
• Australian Made: Manufactured locally with quality assurance standards
• Versatile Application: Suitable for both internal and external priming applications

Applicable Substrate Types

Nitoprime 115 is designed for application on a wide range of non-porous surfaces, including:

• Metallic surfaces: Galvanised iron, stainless steel, copper, and brass
• Composite materials: Compressed Fibre Cement (CFC) sheeting
• Plastics and polymers: PVC and other non-PE based rigid plastics
• Ceramic and tile surfaces: Glazed tiles (enabling re-tiling without etching or grinding)
• Dense concrete: Non-absorbent concrete substrates
• Painted and coated surfaces: Sound painted and powder-coated surfaces
• Wet area timber: Non-porous timber used in moisture-prone environments
• Various metals and alloys: Including Scyon sheeting and Zincalume

Technical Properties and Specifications

Wet Form Characteristics

The product demonstrates the following properties in its wet, uncured state:

Application and Drying Times

Nitoprime 115 features efficient drying characteristics that enable rapid project progression:

• Tack-Free Drying Time: 15 minutes under normal ambient conditions (23°C), though this varies with surface porosity
• Dry Film Drying Time: 30 minutes at 23°C
• Extended Curing at Low Temperature: When applied at 10°C, drying times should be doubled as a minimum

Coverage and Supply Information

Coverage Rate: Approximately 10 to 12 square metres per litre, depending on surface profile and substrate characteristics.

Supply Format: Nitoprime 115 is supplied in 4-litre pail containers with product code FC000600-4L, making it practical for both small and large-scale coating projects.

Surface Preparation Requirements

Proper surface preparation is essential for optimal performance. Surfaces must be:

• Clean, dust-free, sound, and stable
• Free of loose foreign material and existing degraded coatings
• Free of laitance, release agents, and curing compounds
• Free of oil and grease residues

For Specific Surface Types:

• Powder-coated metals: Light abrasion with 240-grit sandpaper followed by wipe-clean with Fosroc Solvent 10
• PVC and rigid plastics: Abrasion with 240-grit sandpaper prior to primer application
• CFC substrates: Water droplet testing is advisable to determine porosity grade, as some CFC variations may be porous and require Nitoprime 120 instead

Application Instructions

Nitoprime 115 should be lightly stirred before use and can be applied to vertical, horizontal, and overhead surfaces using either a roller or brush. The product can also be rendered or tiled over, with polymer-modified cement-based tile adhesive recommended for direct tile adhesion.

Limitations and Restrictions

• Not designed as a standalone UV-exposed or trafficable sealer
• Not suitable for immersed areas as a standalone product
• Solvent-based finishes incompatible: Only water-based systems should be applied over Nitoprime 115
• Surface temperature considerations: Application requires assessment of surface temperature conditions independently from ambient temperature, as substrate temperature may differ significantly and affect suitability

Recommended Subsequent Coatings

Nitoprime 115 serves as an essential primer for application of water-based Nitoproof membranes, including:

• Nitoproof 410
• Nitoproof 210
• Nitoproof 810
• Nitoproof Top Coat UV
• Nitoband System installations

Storage and Shelf Life

Nitoprime 115 should be stored in cool, dry conditions between 5°C and 30°C in original, unopened containers to maintain product integrity and performance characteristics.

Cleaning and Removal

• Wet state: Product cleans up easily with water
• Dry state: Requires removal with Fosroc Solvent 10 or mechanical means

References

• [1] Fosroc_Nitoproof_810_NZ_TDS.pdf
• [2] Fosroc_Nitoproof_810_TDS.pdf
• [3] Fosroc_Nitoproof_410_TDS.pdf
• [4] Fosroc_Nitoprime_115_TDS.pdf
• [5] Fosroc_Nitoprime_120_TDS.pdf