---
title: Conbextra CB - High Flow Grout for Void Fill Applications
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description: Conbextra CB is a highly flowable high strength grout which can be used for various void fill applications including backfilling behind concrete tunnel segments and bottom up cable bolt grouting applications. Develops early high strength without the use of chlorides with excellent pumpability over both flowable and thixotropic consistencies.
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---

# Conbextra CB - High Flow Grout for Void Fill Applications

# Conbextra CB - High Flow Grout for Void Fill Applications

Conbextra CB is a highly flowable high strength grout which can be used for various void fill applications including backfilling behind concrete tunnel segments and bottom up cable bolt grouting applications. Develops early high strength without the use of chlorides with excellent pumpability over both flowable and thixotropic consistencies.

**Price:** Available

**Brand:** Fosroc

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

## Product Intelligence

# Conbextra CB – High Flow Grout for Void Fill Applications

## Product Overview

**Conbextra CB** is a highly flowable cementitious grout specifically designed for void fill applications. It represents a key offering within the Conbextra® range of precision grouting solutions provided by Fosroc.

## Technical Specifications

### Gap Thickness Range

Conbextra CB accommodates gap thicknesses of **10–100 mm**, making it suitable for medium-sized void fill and gap applications in construction projects.

### Key Characteristics

The product combines the following technical features:

- **High Flowability:** Engineered to deliver excellent flow properties, enabling it to effectively fill voids and gaps with minimal effort
- **High Strength:** Formulated to achieve robust compressive strength for load-bearing applications
- **Cementitious Base:** A cement-based formulation that provides durability and long-term performance in construction environments

## Application Areas

Conbextra CB is specifically formulated for:

- **Void Fill Applications:** Primary use for filling voids in concrete structures
- **Gap Filling:** Suitable for filling gaps between 10–100 mm in various construction scenarios
- **Structural Grouting:** Can be used in applications requiring both flowability and strength

## Product Positioning

Conbextra CB is part of the broader **Conbextra range**, which delivers precision grouting solutions for structural and machinery applications. Within the Conbextra cementitious grouts category, it complements other products such as Conbextra C (general purpose) and Conbextra Deep Pour (for deeper sections up to 500 mm).

## Manufacturer

**Conbextra CB** is manufactured and supplied by **Fosroc**, a construction chemicals company with over 80 years of heritage. In Australia and New Zealand, the product is manufactured and distributed by Parchem Construction Supplies Pty Ltd under licence from Fosroc International.

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### References

- [1] directory/business_homepage/fosroc.md