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

Product Overview

Nitoprime 115 is a water-based primer specifically engineered with adhesion-enhancing properties for application on non-porous substrates. It serves as a safe alternative to hazardous solvent-based primers and etching products, enabling the adhesion of water-based paints, coatings, membranes, and adhesives over non-absorbent surfaces.

Key Applications

Nitoprime 115 is suitable for priming over a diverse range of non-porous surfaces, including:

• Metallic surfaces: Galvanised iron, zincalume, stainless steel, copper, and brass
• Building materials: Scyon sheeting, wet area timber, and dense concrete
• Specialty surfaces: Glazed tiles (enabling re-tiling without etching or grinding), sound painted/powder-coated surfaces, PVC, and non-PE based rigid plastics
• Composite materials: Non-porous Compressed Fibre Cement (CFC) sheeting
• Additional substrates: Ceramic tile, metals, and plastics

Advantages

The product offers several significant benefits:

• Low VOC content at 22g per litre, making it environmentally friendly
• Fast-drying formulation enabling efficient workflow
• Non-flammable and free of hazardous odours
• Excellent water resistance for durability
• Cost-effective alternative to grinding and etching surfaces
• Suitable for internal and external priming applications
• Australian made product

Technical Specifications

Physical Properties (Wet Form)

Application Characteristics

Coverage Rate: 10 to 12 square metres per litre (may vary depending on surface profile)

Drying Times (based on normal ambient conditions of 23°C):

• Tack-free: 15 minutes (varies with surface porosity)
• Dry film: 30 minutes
• Note: Double drying times if applied at 10°C; do not apply membrane coatings until primer has completely dried

Surface Preparation Requirements

Before applying Nitoprime 115, surfaces must be:

• Clean, dust-free, sound, and stable
• Free of loose foreign material, degraded coatings, laitance, release agents, curing compounds, and oil/grease residues
• Wiped down with a wet cloth and allowed to dry to remove dust

Special Preparation Procedures

For powder-coated metals: Light abrasion using 240-grit sandpaper is recommended, followed by wiping clean with Fosroc Solvent 10 prior to primer application.

For PVC and rigid plastics: Surface abrasion with 240-grit sandpaper is required prior to primer application.

Application Instructions

Preparation: Nitoprime 115 should be lightly stirred before use.

Application methods: The primer can be applied to vertical, horizontal, and overhead surfaces using:

• Roller
• Brush

Coverage options: Nitoprime 115 can be rendered or tiled over; polymer-modified cement-based tile adhesive is recommended for direct adhesion.

Important Limitations

• Not designed for use as a UV-exposed or trafficable sealer as a stand-alone product
• Not suitable for applications in immersed areas as a stand-alone product
• Incompatible with solvent-based finishes—only water-based systems should be applied over Nitoprime 115

CFC Substrate Consideration

When applying over CFC, it is advisable to conduct a water droplet test to determine the porosity of the particular grade, as porosity can vary. If water is absorbed quickly into the CFC, it should be considered "porous" and primed with Nitoprime 120 instead.

Supply and Storage

Supply Format: 4-litre pails designated as product code FC000600-4L

Storage conditions: Keep in a cool, dry store between 5°C and 30°C in original, unopened containers.

Cleaning and Maintenance

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

Membrane System Compatibility

Nitoprime 115 primer is recommended for use prior to application of various Nitoproof water-based membranes on non-porous substrates, including:

• Nitoproof 410
• Nitoproof 210
• Nitoproof 810
• Nitoproof Top Coat UV

Temperature Considerations

Important Note: Application of Nitoprime 115 should always refer to surface temperature conditions before commencing, not just ambient temperatures. Surface temperature may differ significantly from ambient temperature and affect application suitability. For example, ambient temperatures may be 10°C but the substrate could be 0°C with frost issues.

References

• [1] Fosroc_Nitoprime_115_TDS.pdf
• [2] Fosroc_Nitoproof_410_TDS.pdf
• [3] Fosroc_Nitoproof_810_TDS.pdf
• [4] Fosroc_Nitoproof_410_NZ_TDS.pdf