Renderoc HB - Lightweight High Build Concrete Repair Mortar

Based on the available documentation, I must note that specific technical details, detailed specifications, and comprehensive features for Renderoc HB products are not extensively detailed in the provided knowledge base.

Overview

Renderoc HB is part of Fosroc's comprehensive Renderoc concrete reinstatement system. The product line includes several variants designed for concrete repair and restoration applications.

Renderoc HB Variants

The Renderoc HB product family includes the following identified variants:

• Renderoc HB70 - A high-strength cement-based mortar used as an alternative to Nitomortar AP for repairing blow holes and imperfections in concrete surfaces
• Renderoc HB40 Plus - A specific variant with specialized curing requirements
• Renderoc LA55 Plus - Another variant within the Renderoc HB system

Application Characteristics

Blow Hole and Imperfection Repair

Renderoc HB70 serves as a high-strength alternative repair material for concrete surface defects. According to preparation guidelines, concrete surfaces should have blow holes and imperfections filled with materials such as Renderoc HB70, which should be allowed to harden overnight and then ground back before proceeding with subsequent coating applications.

System Integration

The Renderoc products are designed to work within an integrated concrete repair system:

• Primer Application: Renderoc materials require Nitobond HAR as a primer for proper adhesion and bond strength
• Surface Preparation: All repair materials should be applied over properly prepared substrates
• Compatibility: The Renderoc system is compatible with Dekguard coating systems (including Dekguard S, Dekguard Elastic, and Dekguard E2000)

Curing Requirements

An important distinction for Renderoc HB products is their curing membrane specification:

• Renderoc HB70 Plus, Renderoc HB40 Plus, and Renderoc LA55 Plus should NOT be cured with Nitobond AR
• Instead, these products should be cured with Concure A99 as the recommended curing compound

Fairing Coat Options

The Renderoc system includes complementary surface finishing products:

• Renderoc FC - A cementitious fairing coat used to fill blow-holes and areas of pitting in concrete surfaces before coating application, requiring approximately 48 hours curing time
• Renderoc ST 06 - An alternative cementitious fairing coat with similar properties and application requirements

Key Applications

Renderoc HB products are engineered for:

• Repair of concrete surface imperfections
• Filling of blow holes before protective coating application
• Structural restoration and maintenance
• Preparation of substrates for subsequent coating systems

References

• [1] Fosroc_Conbextra_BB92_TDS.pdf
• [2] Fosroc_Nitocote_EP405_TDS.pdf
• [4] Fosroc_Nitocote_EP410_TDS.pdf
• [5] Fosroc_Nitomortar_908_TDS.pdf
• [6] Fosroc_Nitomortar_AP_TDS.pdf