Post Mix

(17 customer reviews)

£5.95Including VAT


Post Mix Concrete 20kg

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Post Mix is suitable for use in fixing all types of wooden, metal and concrete posts. Post Mix is also sometimes known as postcrete.


The mix is a kiln-dried, pre-blended, factory-produced, quick-setting concrete which hardens in approximately 10 minutes after water addition, depending on ambient conditions.

Post Shape & Size

Hole Size (Width x Depth)

Approx number of bags required

Round 2″

6″ (150mm) x 12″ (300mm)
6″ (150mm) x 18″ (450mm)
6″ (150mm) x 24″ (600mm)
8″ (200mm) x 12″ (300mm)
8″ (200mm) x 18″ (450mm)
8″ (200mm) x 24″ (600mm)

1/2 Bag
1/2 Bag
3/4 Bag
2/3 Bag
1 Bag
1 1/2 Bags

Square 3″

8″ (200mm) x 18″ (450mm)
8″ (200mm) x 24″ (600mm)
8″ (200mm) x 30″ (750mm)
12″ (300mm) x 18″ (450mm)
12″ (300mm) x 24″ (600mm)
12″ (300mm) x 30″ (750mm)

3/4 Bag
1 Bag
1 1/3 Bag
2 1/4
3 Bags
3 3/4 Bags

Square 4″

8″ (200mm) x 18″ (450mm)
8″ (200mm) x 24″ (600mm)
8″ (200mm) x 30″ (750mm)
12″ (300mm) x 18″ (450mm)
12″ (300mm) x 24″ (600mm)
12″ (300mm) x 30″ (750mm)

2/3 Bag
3/4 Bag
1 Bags
2 Bags
2 3/4 Bags
3 1/2 Bags

How to use

  • Dig hole to required size for post, half fill hole with water and place the post in the hole.
  • The material is already pre mixed and there is no need for mixing, it can simply be emptied straight from the bag into the hole.
  • Add the Remix Post Mix Concrete uniformly around the post until it is above the level of water. If any dry powder remains visible at this stage, add additional water until absorbed by the material.
  • Adjust the post into position & support appropriately until material set occurs after approximately 10 minutes.


After laying

Once concrete has set, cover with earth, grass or decorative aggregate as required.

17 reviews for Post Mix

  1. Deborah W.

  2. Alan Lopez

    Worked fine. The driver was a top guy,very helpful.👍

  3. Michael N.

  4. clive cousins

  5. Mark B.

  6. Andrew

  7. Alan Lopez

  8. roger d.

  9. Anonymous

  10. Peter P.

    Kebur always seem to have everything I need at a good price and swift delivery even if I only order in small lots. Helpful and pleasant staff.

  11. Shaun C.

    Does exactly what it says on the bag. Great

  12. Julie Pilgrim

  13. Mark Collins

  14. Ian H.

    haven’t used it yet so can only comment the bags were in good condition.

  15. Maria R.

  16. Paul

  17. Malcolm Glanville

    It works well

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