Nitoprime Zincrich: Comprehensive Technical Overview

Product Description

Nitoprime Zincrich is a zinc-rich epoxy resin primer supplied as a single-component, grey-colored liquid formulation. It is specifically engineered to protect steel reinforcement from corrosion within repair mortar applications. The product combines metallic zinc with epoxy resins to create an effective anti-corrosion barrier against chlorides and other corrosive elements attacking exposed steel.

Key Advantages

Nitoprime Zincrich offers multiple practical and performance benefits:

• Excellent protective barrier to steel from further corrosive attack
• Single component product with easy application and no restrictive pot-life
• Time-saving characteristics with touch dry properties after 15-45 minutes
• Economical formulation ensuring minimal product waste
• Complies with AS4020:2018 – approved for use in drinking water applications
• Approved by British Board of Agreement (Certificate No. 91/2582) as part of the Renderoc concrete repair system
• Conforms to AS/NZS 3750.9 Type 1 standards

Technical Properties

Application Specifications

Coverage and Supply

Application Instructions

Surface Preparation

Proper steel preparation is critical for optimal primer performance:

• Expose fully any corroded steel in the repair area
• Remove all loose scale and flaky corrosion deposits
• Grit blasting or high pressure water blasting is recommended for this process
• High-pressure wash with clean water immediately after grit-blasting (for chloride-contaminated steel) to remove corrosion products from pits and surface imperfections
• Steel preparation window: Nitoprime Zincrich must be applied to dry steel within 3 hours of steel preparation

Application Process

• Stir the single-component product thoroughly before use to redisperse any settlement
• Apply one full and unbroken coat using a suitable brush
• Ensure proper coating of the back of exposed steel reinforcing bars
• Allow to dry fully before continuing
• If an unbroken coating is not achieved, apply a second coat as soon as the first coat is fully dry
• Apply concrete repair mortar over Nitoprime Zincrich as soon as it is fully dry (typically 30 minutes to 1 hour depending on environmental conditions)
• Maximum 14 days interval acceptable in non-aggressive exterior environments
• Reduce interval to practical minimum in industrial and/or marine environments

Low Temperature Working

• Minimum application temperature is 5°C
• Material should not be applied when substrate and/or air temperature is 5°C and falling
• Application may proceed at 5°C stable temperature or 5°C and rising

Material Composition

Nitoprime Zincrich's protective properties derive from its key chemical components:

• Metallic Zinc – provides anti-corrosion protection
• Epoxy Resins – form the binder matrix
• These components work synergistically to create a durable protective coating against corrosive attack

Storage and Shelf Life

• Storage conditions: Original packaging in cool, dry area
• Shelf life: May be reduced if stored at high temperatures
• Temperature range: Cool, dry storage conditions recommended

Cleaning and Removal

• Remove from tools and equipment using Fosroc Solvent 10 immediately after use
• Solvent 10 is supplied in 4 and 20 litre containers

Standards Compliance

Nitoprime Zincrich demonstrates comprehensive regulatory compliance:

• British Board of Agreement certification – Certificate No. 91/2582 as part of Renderoc concrete repair system
• AS/NZS 3750.9 Type 1 conformance
• AS4020:2018 compliance – tested to drinking water standards (AWQC Report 354931)
• Certification copies available from the Fosroc website

Compatible Applications

Nitoprime Zincrich is specifically formulated for use with:

• Renderoc concrete repair mortars – all products in the range are compatible
• Fluid micro-concretes
• Nitobond SBR mortars – applied over the fully dry primer
• Guncrete E – applied as a full coat before Guncrete E in areas with exposed corroded steel

Important Safety Information

A Safety Data Sheet (SDS) is available from the Fosroc website and must be read carefully prior to use, as application and performance data may change over time.

References

• [1] Fosroc_Nitoprime_Zincrich_TDS.pdf
• [8] Fosroc_Nitobond_EP_TDS.pdf