Postmix Concrete

a high quality pre-mixed formulation specifically designed for setting posts


Postmix Concrete is an ultra-rapid setting blend of cements, additives and graded coarse & fine aggregates that has been designed and formulated to make fixing posts quick and easy. The factory blended, high quality concrete is the ideal solution for all post erecting applications.

Postmix Concrete is specifically designed for securing fence posts (concrete, timber, metal and plastic), gates, washing line poles, rotary washing lines, fence support posts and bird feeders.

A high quality pre-mixed formulation specifically designed for the fast setting of wooden, concrete or metal posts. Postmix Concrete is simple to use, just add water. Sets posts in 5 - 10 mins.

Where can Postmix Concrete be used?

Fence posts

Postmix Concrete is ideal to use for setting fence posts.

Gate posts

Postmix Concrete can be used to set gate posts.

Rotary washing line

The properties within Postmix Concrete make it ideal to use for rotary washing lines.

Why use Postmix Concrete?

Additional info

Typical Coverage - One 20kg bag is required per standard fence post. When mixed with water one bag will cover approximately: 0.12m2 at a depth of 75mm 0.09m2 at a depth of 100mm

Typical Performance - Initial set time: 5-10 minutes depending on conditions – cool temperatures retard, warm temperatures accelerate. Typical compressive strength achieved at 28 days is 15N/mm2.

After care - Protect newly placed Postmix Concrete against frost and rain by using hessian or polythene sheeting. In dry or windy conditions, do not allow the Postmix Concrete to dry out too quickly. Allow concrete to dry sufficiently before proceeding with further works.

Postmix Concrete contact


Nationwide network

UK Coverage

Tarmac is a national network of localised businesses, offering construction material supply. In addition, our building products division has a nationwide network of 19 production and distribution plants, including co-located plants with our internal quarries, which enables us to provide an efficient service across the UK.

Continual improvement

We are continually investing in new plant, manufacturing and bagging technology to ensure quality consistency and our commitment to the ‘Ultimate Manufacturing’ framework empowers us to deliver continuous operational improvement.

Promotional support

Marketing materials

Our products aren’t just easy to use, they’re easy to sell. We offer our stockists a full range of high impact support materials from point of sale materials, to yard banners and posters, not only that, our products are available in attractive, durable, rip resistant poly packaging. 

Website ready

We understand that web activity is more important than ever with many consumers now browsing your website before buying. We have a descriptive text for each of our product range, along with a library of images for you to upload to your website to enhance product listings. 


Download files individually or add multiple files to a zip folder.