---
title: Conbextra C - AU - Dual Shrinkage Compensated Cementitious Grout
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description: Conbextra C is a dual shrinkage compensated, high flow cementitious grout for gap thicknesses from 10 mm up to 100 mm. Can be used as a flowable or trowel applied grout. Suitable for use under baseplates and other applications where a precision high flow grout is required. Features dual expansion system, high ultimate strength, low permeability, and hydrogen free gas expansion.
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---

# Conbextra C - AU - Dual Shrinkage Compensated Cementitious Grout

# Conbextra C - AU - Dual Shrinkage Compensated Cementitious Grout

Conbextra C is a dual shrinkage compensated, high flow cementitious grout for gap thicknesses from 10 mm up to 100 mm. Can be used as a flowable or trowel applied grout. Suitable for use under baseplates and other applications where a precision high flow grout is required. Features dual expansion system, high ultimate strength, low permeability, and hydrogen free gas expansion.

**Price:** Available

**Brand:** Fosroc

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

## Product Intelligence

# Conbextra C: Dual Shrinkage Compensated Cementitious Grout

## Product Overview

**Conbextra C** is a general-purpose cementitious grout manufactured and distributed by Fosroc, designed for precision grouting applications in structural and machinery settings. It is a bridging mortar specifically engineered for gap-filling operations where moderate gap thicknesses are required.

## Technical Specifications

### Gap Thickness Range

Conbextra C is designed to accommodate gap thicknesses of **10–100 mm**, making it suitable for a wide range of void-filling and grouting applications requiring medium-depth coverage.

### Key Technical Features

The product delivers the following technical characteristics:

- **Dual Shrinkage Compensation:** Engineered with compensating mechanisms to minimize shrinkage during the curing process, ensuring dimensional stability and reducing the risk of gaps or voids reopening
- **High Flow Properties:** Formulated to provide excellent flowability, enabling the grout to fill complex void geometries and reach inaccessible areas effectively
- **Cementitious Composition:** Based on cement chemistry, making it suitable for structural applications requiring reliable strength development

## Applications

Conbextra C serves multiple application domains:

| Application Type | Use Case |
|-----------------|----------|
| **General Purpose Grouting** | Versatile grouting for standard structural and machinery applications |
| **Void Filling** | Filling voids and gaps in concrete and masonry structures |
| **Machinery Foundations** | Grouting foundations for machinery equipment requiring precision alignment |
| **Structural Grouting** | General structural applications where gap closure and load transfer are required |

## Product Positioning

Conbextra C is part of the **Conbextra Range**, Fosroc's comprehensive line of precision grouting solutions. Within the cementitious grout portfolio, it serves as the general-purpose offering, positioned between smaller gap applications and deep-pour applications:

- **Smaller Gaps (up to 10 mm):** Conbextra EP10 (epoxy alternative)
- **General Purpose (10–100 mm):** **Conbextra C** (cementitious)
- **Larger Gaps (20–500 mm):** Conbextra Deep Pour (high-flow cementitious)
- **Void Fill Applications (10–100 mm):** Conbextra CB (highly flowable, high strength)

## Related Products

The Conbextra range includes complementary products for different application requirements:

| Product | Gap Thickness | Key Distinction |
|---------|---------------|-----------------|
| Conbextra CB | 10–100 mm | Highly flowable with high strength for void fill |
| Conbextra CB-C | 10–100 mm | Class A/C specification for tunnel backfill |
| Conbextra Deep Pour | 20–500 mm | High flow for deep section applications |
| Conbextra UW | 20–100 mm | Ultra-high performance for wind turbine foundations |

## Manufacturer and Availability

**Manufacturer:** Fosroc (manufactured and distributed by Parchem Construction Supplies Pty Ltd in Australia)

**Availability:** Available through Fosroc Australia's trade store network and via Concrete Plus™ (licensed distributor in New Zealand)

**Contact Information:**
- Australian Website: www.fosroc.com.au
- Toll-Free Australia: 1800 812 864
- New Zealand: 0800 657 156 (via Concrete Plus™)

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### References

- [1] Fosroc Australia Business Profile and Product Specifications