Description
Non-Shrink Cementitious Grout
Fosroc Conbextra GP is a high-performance, free-flow, non-shrink cementitious grout designed for precision grouting applications where strength, stability and durability are critical. Supplied as a pre-blended dry powder containing cement, graded fillers and performance-enhancing additives, it requires only the addition of water to create either a flowable or trowelable consistency.
Developed for gap thicknesses from 10mm to 75mm, Conbextra GP provides high early and ultimate strength while remaining dimensionally stable during curing. Its non-shrink properties help ensure complete load transfer and long-term support beneath baseplates, machinery, precast concrete units and structural steel installations.
Suitable for both new construction and refurbishment projects, Fosroc Conbextra GP offers reliable performance for a wide range of civil engineering, industrial and commercial grouting applications.
Key Features & Benefits
- Free-flow non-shrink cementitious grout
- Pre-blended and ready to use
- Just add water
- High early strength development
- High ultimate compressive strength
- Does not segregate
- Does not bleed
- Excellent load transfer properties
- Suitable for flowable applications
- Suitable for trowelable applications
- Easy to mix and apply
- Fire rated Class A1 non-combustible
- Suitable for gap thicknesses from 10mm to 75mm
- Reliable dimensional stability
- Ideal for structural and industrial grouting
Suitable Applications
- Stanchion baseplate grouting
- Machinery baseplate grouting
- Precast concrete panel installation
- Structural bedding applications
- Anchor bolt grouting
- Reinforcing steel bar anchoring
- Tie bar installation
- Equipment foundation grouting
- Structural support grouting
- Civil engineering projects
- Commercial construction projects
- Industrial construction applications
Technical Information
- Product Type: Non-shrink cementitious grout
- Pack Size: 25kg
- Gap Thickness: 10mm – 75mm
- Consistency Options: Flowable or trowelable
- Fire Rating: Class A1 Non-Combustible
- Bond Strength (Pull-Off): 2.6 MPa
- Flexural Strength: 10.0 MPa at 28 days
- Initial Set Time: Approximately 6 hours
Compressive Strength
- 1 Day: 15 MPa
- 7 Days: 45 MPa
- 28 Days: 65 MPa
Expansion Characteristics
- Expansion Start: 15 minutes
- Expansion Finish: 2 hours
Water Addition per 25kg Bag
Flowable Consistency
- 4.0 – 4.5 litres of water
Trowelable Consistency
- 3.4 – 3.6 litres of water
Frequently Asked Questions
What is Fosroc Conbextra GP used for?
It is used for non-shrink precision grouting beneath baseplates, precast concrete units, anchor bolts, reinforcing bars and structural supports.
What thickness can Conbextra GP be applied at?
It is suitable for gap thicknesses between 10mm and 75mm.
Is it supplied ready to use?
Yes. The product is supplied as a pre-blended dry powder and only requires the addition of water.
Can the consistency be adjusted?
Yes. Water content can be adjusted to produce either a flowable or trowelable grout depending on application requirements.
Does Conbextra GP shrink during curing?
No. It is specifically formulated as a non-shrink grout to maintain dimensional stability and ensure effective load transfer.
What compressive strength does it achieve?
Conbextra GP reaches 15 MPa after 1 day, 45 MPa after 7 days and 65 MPa after 28 days.
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