Skip to content
⚡ Rock Bottom Prices. Maximum Choice.⚡
⚡ Rock Bottom Prices. Maximum Choice.⚡

Postmix 20Kg Bag

SKU 22020
Original price £6.99 - Original price £6.99
Original price
£6.99
£6.99 - £6.99
Current price £6.99
Available to orderCollect in 2-3 working daysDelivery in 3-4 working days
✓Cheaper than Wickes, B&Q & Toolstation
Wickes price £7.50You save £0.51
Compared with their equivalent: Blue Circle Ready To Use Postcrete - 20kg
B&Q price £7.50You save £0.51
Compared with their equivalent: Blue Circle Postcrete, 20kg Bag - Ready mixed
Toolstation price £7.49You save £0.50
Compared with their equivalent: Blue Circle Postcrete 20kg
Prices checked 11 Nov 2026 on their websites. Excludes delivery. How we check
TRADE Trade price £6.64 with a free trade account Trade prices online and in store · approved fast · already approved? sign in Apply in 2 mins
Available to order — not in the Northampton shop today
Click & Collect — Rock Bottom Northampton Ready in 2-3 working days · FREE
Van delivery — our own van, within 10 miles £19.99 on orders over £100 · too big to post, so we bring it ourselves. Pick your day and hour in the basket.

Description

Post Mix Concrete is suitable for use in fixing all types of wooden, metal and concrete posts.

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.
🔨 Trade Prices for Everyone

Why pay more? We keep our prices rock-bottom so whether you’re a trade professional or DIYer, you always get the best deal.

🏠 Local & Independent


We’re Northampton’s trusted family-run store, supporting local people with great products and honest service.

🚚 Easy Pickup or Local Delivery

Order online and collect in-store, or get heavy items like blocks and cement delivered straight to your site.

👍 Friendly, Helpful Service

Our staff know their stuff — whether it’s building materials, DIY or garden, we’re here to help you get the job done.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare