Fosroc Conbextra TS

Non Hazardous
A high-flow, non-shrink, aggregate filled cementitious grout. Class R4.
Available in single 25 Kg bags, 20x 25 Kg bags (1/2 Pallet) and 40x 25 Kg bags (Full pallet)
From £38.88 £32.40
In stock
Only %1 left
Product Description

Fosroc Conbextra TS is a high-flow, non-shrink, aggregate filled cementitious grout conforming to the requirements of BS EN 1504-3 Class R4.

Best Uses

Conbextra TS is used for free flow, non-shrink, cementitious grouting for gap thicknesses 75 to 500 mm. Recommended applications include stanchion baseplates where a large gap is present, joints between pre-cast concrete panels and filling box sections.

  • Non-shrink
  • High strength
  • Chloride free
  • Can be pumped or poured
  • Suitable for thick sections

Fosroc Conbextra TS is supplied as a ready to use dry powder. The addition of a controlled amount of clean water produces a free-flowing grout for gap thicknesses 75 - 500mm. In addition, the low water requirement ensures high early strength and long-term durability.

Conbextra TS is a blend of Portland cements, graded fillers, selected aggregates and chemical additives. The filler grading produces a highly flowable grout which will not segregate or bleed and reduces the exothermic heat generation and risk of thermal cracking common with gap thicknesses in excess of 100 mm.


Preparation is depending on situation. Please refer to product data sheet for full application guidance.


Technical Details

Approvals and Certifications

  • London Underground Approved: LUL APR No. 2437
  • UK Highways Agency BD27/86 Clause 4.6(b) EN 13395-3 = 750mm within 10 secs
  • Conbextra TS complies with classification R4 according to BS EN 1504-3
  • Conbextra TS complies with LU Standard 1-085 ‘Fire Safety Performance of Materials’

Technical Info

Components: Single Pack
Type: Cementitious Grout
Stock Colours: Grey
Tintable: No
Application Method: Trowel
Theoretical Coverage: The approximate yield per 25 kg bag is 12 litres (0.012 m3)
Water Addition Per Bag: 3.3 Litres per 25 Kg bag
Compressive Strength:

EN 12190:1999. Class R4 > 45 MPa.

1 Day at 20°C = 14 MPa
7 Days at 20°C = 42 MPa
28 Days at 20°C = 60 MPa

Minimum Thickness: 75mm
Maximum Thickness: 500mm
Placing: Place the grout within 20 minutes of mixing to gain the full benefit of the expansion process.
Cleaner / Thinner: Conbextra TS should be removed from tools and equipment with clean water immediately after use. Cured material can be removed mechanically, or with Fosroc Acid Etch.
Shelf Life: 12 months if kept in a dry store in sealed bags. If stored in high temperature and high humidity locations the shelf life may be reduced to less than 6 months.
Packaging: Available in Single 25Kg Bags, 20x 25 Kg bags (1/2 Pallet) and 40x 25 Kg bags (Full pallet)

The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.

Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.

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