The bags seemed to have been the last in the yard, they were full of holes, one had needed to be re-bagged.

20kg Bag Post Fixing Mix Reviews
A product’s star rating is calculated as the average of all its reviews.

Sold by Jacksons Fencing
The information on this page is based solely on product reviews written by customers of Jacksons Fencing via Trustpilot.
Here’s what people highlighted
Product details
All reviews
goes off well - good weatherproof bags, delivered well-packed and protected on pallet
Solid & Sturdy fencing
Did the job,.
Good products
Very convenient
Needed more than I originally bought.
Does the job well.
Great, and certainly needed 2 bags per post
This is the best way of fixing posts that I have used - just follow the instructions. The bags are very heavy duty polyethylene (so recycleable) but any damage to them results in moisture penetration causing localised setting of some of the contents. While this is not ideal, I have found that the lumps can be broken up and used or just poured down the hole if they fit. It still achieves the job of a creating a perfectly fitting filler between the post and the ground.
Easy to use
The amount of the mix suggested was correct for the job and nothing left over at the end.
Cheaper in B+Q
Excellent