Nitoprime Zincrich: Zinc-Rich Epoxy Resin Primer

Product Overview

Nitoprime Zincrich is a zinc-rich epoxy resin primer specifically engineered to provide anti-corrosion protection for exposed steel reinforcement in concrete repair applications. This single-component product offers a protective barrier against further corrosive attack, making it an essential component in concrete repair and structural maintenance systems.

Product Description

Nitoprime Zincrich is supplied as a single component grey-coloured liquid formulated based on two key components:

• Metallic Zinc: Provides the primary anti-corrosion protection
• Epoxy Resins: Form the binder matrix that encapsulates the zinc particles

The product's single-component formulation eliminates the need for on-site mixing, resulting in easy application with no restrictive pot-life restrictions.

Key Features and Advantages

• Excellent protective barrier to steel from further corrosive attack
• Single component product — easy to use with no restrictive pot-life
• Time saving — touch dry after 15-45 minutes
• Economical — single component ensures almost no waste
• Formulated for use with Renderoc repair products and compatible with all concrete repair mortars and fluid micro-concretes
• Complies with AS4020:2018 — suitable for use in drinking water applications
• Standards compliant — Conforms to AS/NZS 3750.9 Type 1

Application Specifications

Recommended Thickness

• Dry film thickness per coat: 50 microns
• Wet film thickness per coat: 120 microns

Drying Times

The drying times are temperature-dependent:

Note: At temperatures below 20°C, drying times will be slower. Conversely, at temperatures above 35°C, drying times will be faster.

Recoat Interval

Nitoprime Zincrich is recoatable generally between 30 minutes and 1 hour after initial application, depending on temperature. Application of concrete repair materials may also proceed at this time.

Application Temperature

• Minimum application temperature: 5°C
• The material should not be applied when the substrate and/or air temperature is 5°C and falling
• At 5°C stable temperature or at 5°C and rising, application may proceed

Coverage Rate

• Theoretical coverage: 8 m²/litre (approximately)

Important Note: This coverage figure is theoretical. Due to wastage factors and the variety and nature of possible steel substrates, practical coverage figures will be reduced.

Surface Preparation Requirements

Proper surface preparation is critical for optimal performance:

1. Expose fully any corroded steel in the repair area
2. Remove all loose scale and flaky corrosion deposits
3. Grit blasting or high-pressure water blasting is recommended for this process
4. Where chloride-induced corrosion has occurred, high-pressure wash the steel with clean water immediately after grit-blasting to remove corrosion products from pits and imperfections
5. Apply to dry steel within 3 hours of steel preparation

Application Instructions

1. Stir thoroughly before use to redisperse any settlement
2. Apply one full and unbroken coat using a suitable brush
3. Ensure the back of exposed steel reinforcing bars are properly coated
4. Allow to dry fully before continuing
5. If an unbroken coating is not achieved, apply a second coat as soon as the first coat is fully dry (recoat time generally between 30 minutes and 1 hour depending on temperature)

Repair Mortar Application Interval

• Non-aggressive exterior environments: Maximum interval of 14 days is acceptable to apply repair mortar
• Industrial and/or marine environments: The interval should be reduced to the practical minimum
• The repair mortar can be applied over Nitoprime Zincrich as soon as it is fully dry, typically ranging between 30 minutes and 1 hour

Chemical Composition

Supply and Packaging

Storage Requirements

• Store in original packaging in a cool, dry area
• Shelf life may be reduced if stored at high temperatures
• Maintain storage in optimal conditions to preserve product efficacy

Cleaning and Removal

• Remove material from tools, equipment, and mixers with Fosroc Solvent 10 immediately after use

Standards Compliance

• British Board of Agreement Certificate: No. 91/2582 (as part of the Renderoc system of concrete repair)
• AS/NZS 3750.9 Type 1: Product conforms to this standard
• AS4020:2018: Nitoprime Zincrich has been tested to comply with this standard for drinking water applications (AWQC Report 354931)

Limitations

Nitoprime Zincrich should not be applied when:

• The temperature is below 5°C or is 5°C and falling
• The steel surface is wet or damp (must be applied to dry steel)
• More than 3 hours have elapsed since steel preparation

Key Entities and Relationships

• Compatible repair mortars: All Renderoc repair products, cement-based repair mortars, and concrete repair mortars
• Related products: Guncrete E (dry-spray repair mortar), Nitobond SBR mortars
• Manufacturer: Fosroc International Limited
• Australian distributor: Parchem Construction Supplies Pty Ltd

References

• [1] Fosroc_Nitoprime_Zincrich_TDS.pdf