Made from a select blend of cement and aggregates, Lafarge Postmix is a premixed, ready-to-use cementitious product ideal for domestic projects. Whether you're working with wood, metal or concrete fence posts, it's the perfect solution for fixing them quickly and securing in all types of soil. Simply place into pre-dug fence post holes and pour in water.

Our fence post mix concrete comes in 20kg plastic bags and offer a 12 month shelf life, ensuring you get the most use out of every bag. The bags are weather resistant for easy storage outside with no risk of deterioration.

If you'd like to find out more about Lafarge Postmix, or any other cement product in the Lafarge packed range, just contact our customer support team on 01285 646900.


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You can contact us on:

Tel       01455 286443


Postmix application
Lafarge Postmix
Postmix application


Brand: Lafarge

Colour: Grey

Weight: 20kg

Location: External

Material: Concrete

Applications: Fence post fixing

Mixing Guidance

One of the main advantages of our premium post mix concrete is its ease of installation. There's no mixing involved, simply add water and you're ready to go. 

Start by digging a hole to fit your post, half fill it with water, then place the post inside. Next, add Postmix uniformly around the post until the mix rises above the water level, then move the post into position and hold it in place for up to ten minutes.

Lafarge Postmix sets in around five to ten minutes, then hardens rapidly. This fast setting time means that fence panels can then be hung after just 30 minutes. 

If you’d like to find out more about our bagged post mix concrete, or any other product within the Lafarge bagged materials range, contact our customer support team on 01285 646900.



A major cement manufacturer with a market-leading position in the UK construction industry, Lafarge cement offers one of the widest packed cement product ranges available.

Committed to innovation, Lafarge consistency integrates advanced technology into products which are manufactured to the highest possible standards.

With a national distribution network available, we can ensure a reliable supply of cementitious products throughout the UK, whether you need one bag or a whole pallet. All backed by an exceptional level of customer service and technical support.