---
title: Renderoc HB25 - High Build Repair Mortar
canonical_url: https://fosroc.directory.norg.ai/construction-materials/concrete-repair-products/renderoc-hb25-high-build-repair-mortar/
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description: Renderoc HB25 is a high build, shrinkage compensated concrete repair mortar for patching up to 1m² sections in concrete up to 30 MPa. It can be applied to vertical concrete patches up to 80mm deep. Suitable for use with Galvashield anode protection systems. Features polymer-modification for extremely low permeability to water, carbon dioxide and chlorides, with exceptional shrinkage compensation for long-term dimensional stability.
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  price: Available
productFeedItemId: 39b0cf3f-a743-41ed-a445-5bcf2c7c76fa
---

# Renderoc HB25 - High Build Repair Mortar

# Renderoc HB25 - High Build Repair Mortar

Renderoc HB25 is a high build, shrinkage compensated concrete repair mortar for patching up to 1m² sections in concrete up to 30 MPa. It can be applied to vertical concrete patches up to 80mm deep. Suitable for use with Galvashield anode protection systems. Features polymer-modification for extremely low permeability to water, carbon dioxide and chlorides, with exceptional shrinkage compensation for long-term dimensional stability.

**Price:** Available

**Brand:** Fosroc

[View Product](https://www.fosroc.com.au/product/renderoc-hb25)

## Product Intelligence

# Renderoc HB25 - Technical Details, Specifications, and Features

## Product Overview

**Renderoc HB25** is a **vertical patch repair mortar** manufactured by Fosroc, designed specifically for localised and small to medium section concrete repairs on vertical surfaces. It represents a key product within the Renderoc® concrete repair range, which is market-leading concrete repair technology trusted across heritage structures and modern infrastructure projects.

## Technical Specifications

### Thickness and Application

| Specification | Details |
|---|---|
| **Thickness Range** | 10–80 mm |
| **Application Orientation** | Vertical patches (vertical surfaces) |
| **Coverage Type** | Localised and vertical patch repairs |

### Compressive Strength

| Specification | Details |
|---|---|
| **Compressive Strength** | 23 MPa |
| **Classification** | Cement-based repair mortar |

## Key Features

**Renderoc HB25** is characterised by the following features:

- **Shrinkage Compensation:** The product includes shrinkage compensation features, which help minimise cracking and reduce the risk of bond failure over time
- **Cement-Based Formulation:** A traditional cement-based repair mortar providing reliable performance and proven durability
- **Vertical Surface Capability:** Specifically engineered to perform on vertical and overhead surfaces with thicknesses up to 80 mm when applied vertically
- **Localised Repair Focus:** Designed for patch repairs of concrete damage including spalling, deterioration, and structural concrete defects on vertical faces

## Related Product Context

**Renderoc HB25** sits within the broader **Patch Repair Mortars** category of the Renderoc® range, which includes other specialised products:

| Product | Application | Thickness | Strength |
|---------|-------------|-----------|----------|
| **Renderoc HB** | Large area and localised patch repairs | Up to 80 mm vertical | 28 MPa |
| **Renderoc HB25** | Vertical patches | 10–80 mm | 23 MPa |
| **Renderoc FC** | Fairing coat | Up to 3 mm | N/A |
| **Renderoc ST 06** | Surface repair | Up to 5 mm | N/A |

## Manufacturer Information

**Renderoc HB25** is manufactured by **Fosroc**, a construction chemicals company with over 80 years of heritage. In Australia and New Zealand, Fosroc products are manufactured and distributed by **Parchem Construction Supplies Pty Ltd** under licence.

### Fosroc Company Details

- **Founded:** 1934 in the United Kingdom
- **Global Presence:** Operates in 76 countries with approximately 3,000 employees
- **Manufacturing:** 20 manufacturing plants worldwide
- **Australian Headquarters:** Lucca Road, Wyong, NSW, Australia
- **Acquisition:** Saint-Gobain completed its acquisition of Fosroc International on 10 February 2025

## Application Suitability

Renderoc HB25 is recommended for:

- **Concrete Repair Solutions:** Designed for localised vertical patch repairs within comprehensive concrete repair solutions
- **Infrastructure Applications:** Suitable for repairing spalled concrete on bridges and infrastructure projects
- **Heritage Structures:** Trusted on heritage structure repairs across Australia and New Zealand
- **Vertical Surface Repairs:** Optimal for repairs on vertical and overhead concrete surfaces

## Technical Support

Fosroc provides comprehensive technical support for Renderoc HB25 through:

- **National Specifications Team:** Expert support for architects, engineers, and specifiers
- **Product Recommendations:** Tailored product and application guidance
- **On-site Training:** Hands-on product application training
- **Account Manager Network:** Over 70 account managers across Australia for technical problem-solving

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### References

- [1] directory/business_homepage/fosroc.md