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Fosroc Conbextra HF - 25KG

Fosroc Conbextra HF - 25KG

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£23.10(Inc VAT)
£19.25(Ex VAT)
SKU: 264Category: Special Application Grout Brand: Fosroc
Fosroc Conbextra HF grout is used for free flow, non-shrink, cementitious grouting of gap thicknesses 10 to 100 mm. This grout is pre-bagged and ready... Read full description

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Fosroc Conbextra HF grout is used for free flow, non-shrink, cementitious grouting of gap thicknesses 10 to 100 mm. This grout is pre-bagged and ready to use as a dry powder. Fosroc Conbextra HF grout is a blend of cement, graded fillers and chemical additives, when mixed with water it becomes highly flowable. In addition to this the low water requirement of HF grout ensures high early strength and long-term durability. 

Fosroc Conbextra HF benefits:

Fosroc Conbextra HF grout has many benefits over other grouts on the market. These benefits of Conbextra HF range from:
  • Non-shrink grout
  • Highly Flowable when mixed with water
  • High early age strength
  • Suitable for pumping
  • Chloride free
  • Conbextra HF complies with LU Standard 1-085 ‘Fire Safety Performance of Materials’ and the standards of BS EN 1504-3 Class R4 and BS EN 1504-6

Fosroc Conbextra HF uses:

Some of the most common applications for Conbextra HF include:
  • Grouting stanchion baseplates
  • Joints between pre-cast concrete panels
  • Anchoring of reinforcing steel bars
  • Filling gaps and voids in congested areas
  • Under grouting heavy machinery and equipment
The high flowability of Conbextra HF ensures that it can easily reach and fill tight spaces, resulting in thorough and effective grouting. Despite its fluid nature, Conbextra HF still possesses the necessary properties to provide high early strength, durability, and stability once it sets and cures.

Buy Fosroc Conbextra HF today for a high-quality cementitious grout for your construction project.

Fosroc Conbextra HF Size - 25kg

Download the Fosroc Conbextra HF Technical Datasheet (PDF)

If ordered before 1PM guaranteed next working day delivery to UK mainland

Conbextra HF Certifications

Fosroc ensures that Conbextra HF conforms to the requirements of the standards BS EN 1504-3 Class R4 and BS EN 1504-6:

More from the Fosroc Conbextra Range

We don't just stock Conbextra HF a look at the full Fosroc Conbextra range:



Delivery and Return

Charges start from £6.90 inc vat on small, lightweight orders and £22.50 inc vat on heavier or difficult to transport items.

All small item orders with a value of £100.00 inc vat will be carriage paid.

All large item orders with a value of £200.00 inc vat will be carriage paid.

*small or large classification of items are determined by weight and dimension of product*

Please note that your order may need to be split into separate packages if over 30KG.

All of the above is based on UK Mainland deliveries, further charges may be incurred if the delivery address is outside of this.

We are also currently unable to deliver outside of the UK on our regular carrier so if you require delivery outside the UK please call or email the details to the office as we reserve the right to refuse service or refund orders based on this.

Guarantee next day delivery.

Some of our products have a note that states – if ordered before 1pm and being delivered to UK mainland on a next day basis.

Please note that given the current circumstances alot of carrier companies are struggling to keep up with demand and although we do book these deliveries as next day services, the carriers cannot always fulfil these and an extra day may be required.

A high percentage of our advertised goods are stock items but be aware that if you are taking very large quantities of stock that we may not be able to fill your order fully on first delivery. Please call the office to check to not be disappointed.

We are also an active trade counter and part of a larger network of companies so stock can be taken at any time but we will always aim to deliver your goods as soon as possible.

Also if ordered along side goods that we cannot guarantee next day delivery on, these will be delivered based on the schedule of the other item.

Signature required on delivery.

The carrier we currently use requires a signature for all deliveries as a proof of delivery. If you cannot guarantee someone will be home to receive this please leave delivery instructions for a safe place or neighbour to leave your goods with. Due to covid and new contactless deliveries, our carriers will not require a signature but will take down the recipients name as POD.

If no one is available to take the delivery, the courier will leave details at the address to rearrange delivery or may leave with a neighbour. Note we may need to make an additional handling charge for the return and re-delivery if a package is unable to be delivered multiple times due to no one being home to receive this. Due to covid our carriers are restricting the number of re-delivery attempts.

After three attempted deliveries our carrier will return the goods to ourselves and in this worst case situation, we may cancel the order and refund your money, excluding any additional charge for the return and re-deliveries.

Materials delivered from our own stock.

Normally 1 – 2 days (this can sometimes be longer if we are waiting for manufacturers’ stock to arrive into ours).

If the order is placed before 1:00pm and all of the items are in stock, then we will endeavour to dispatch your order same day for delivery the following day.

This still applies for deliveries out of our local area but please note that we use independent carriers so be aware that there may be external factors which we cannot control (e.g Far out postcodes or local traffic situations)

Materials delivered direct from the manufacturer.

There may be some occasions when it is more efficient or cost effective to have the materials shipped direct from our suppliers to the customer.

We will place the order immediately upon receipt of your order but this can sometimes take a few working days depending on the manufacturers production schedule or carrier used.

We will always endeavour to get the goods to the customer at the earliest possible date but if these are urgently required, please speak to us to check.

Please note that many manufacturers will offer a next day delivery service at an increased delivery cost and also a cut of time for this order to be placed (usually around 11am / 12pm)

Please call us on 08454 530 017 between 8am and 5pm Monday – Friday or email us on [email protected] for any delivery queries, or urgent requirements.

Please read our full terms and conditions with regard to full details on deliveries.

Fosroc Conbextra HF is a high-flow, non-shrink, cementitious grout.

Conbextra HF is used for free flow, non-shrink, cementitious grouting of gap thicknesses 10 to 100 mm. Recommended applications include:

- Large stanchion baseplates
- Joints between pre-cast concrete panels
- Pumped grouting applications
- Grouting applications where pouring access is restricted
- Anchoring of reinforcing steel bars
- Installation of tie bars

Yes, Conbextra HF is suitable for use in high-flow grouting applications.

Yes can be used indoor and outdoor. The application just has to fall under the min/max thickness, temperature & correct preperation.

Yes, Fosroc Nitoseal MS60 can be used beneath the constructed formwork and between joints so that the formwork is leakproof. For cleaning after use, Fosroc Acid Etch can also be used.

Conbextra HF should be stored in unopened bags in cool dry internal conditions. Conbextra HF has a shelf life of 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.

Yes, Conbextra HF conforms to the standards of BS EN 1504-3 Class R4 and BS EN 1504-6.

The yield from each 25kg bag is 13.25ltrs for a flowable mix, to 13.5ltrs for a fluid.