infoNon-returnableThis product is non-returnable. Once delivered, it cannot be returned under any circumstances. Your statutory rights are not affected.
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Post mix for fence posts
This is a rule-of-thumb guide based on typical hole depths for the selected post length.
Actual usage may vary due to ground conditions, hole size, and digging method.
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Key Features
{{fence}} Suitable for fixing wooden, concrete and metal fence posts
{{update}} Sets quickly in 5-10 minutes
{{water_drop}} Ready to use with just the addition of clean water
{{verified_user}} Comes in handy 20kg weatherproof, tear-resistant plastic bags
Technical Specification
Technical Specification
URN:
6003008
Product:
Postcrete
Brand:
Blue Circle
Application:
Rapid setting of timber, concrete, and metal fence posts or gate posts
Blue Circle Postcrete supplied in 20kg weatherproof bags is a fast-setting, ready-to-use concrete mix specifically formulated for fixing all types of fence posts. The blend combines cement, graded sand, and performance additives in controlled proportions, eliminating the need for manual mixing.
Designed for rapid installation, Postcrete is poured directly into a water-filled post hole where it reacts immediately, setting firm within 5-10 minutes. The result is a stable, high-strength base ideal for timber, concrete, or metal posts used in fencing, landscaping, and light structural applications.
Its consistent formulation ensures dependable results with minimal effort, while the robust plastic packaging allows convenient outdoor storage and handling on site. Each 20kg bag provides an efficient and clean method of securing posts without the tools or mixing required by traditional concrete.
Features & Benefits
Fast-setting formulation: Begins to harden within 5-10 minutes, reducing installation time.
Ready to use: Requires only the addition of clean water - no pre-mixing or batching needed.
Controlled strength: Balanced mix of cement, sand, and additives ensures reliable performance and durability.
Ease of use: Simple pour-in-place method eliminates mess and reduces labour.
Multi-post compatibility: Suitable for fixing wooden, metal, and concrete fence posts, gateposts, and bollards.
Weatherproof packaging: Heavy-duty 20kg plastic bag resists moisture and damage for reliable on-site storage.
Quick panel installation: Posts can support fence panels within approximately 10 minutes of setting.
20kg bag supply: Convenient size for manual handling and efficient use on small to medium fencing projects.
Applications
Fence posts: Designed for rapid installation of timber, metal, and concrete posts.
Gateposts and bollards: Provides secure anchorage for light structural supports.
Rotary washing lines and signposts: Ensures stability for domestic and garden installations.
Decking and garden structures: Suitable for pergolas, arches, and small outdoor frameworks.
General landscaping works: Used wherever quick, controlled post setting is required.
Installation Guidance
Prepare the hole: Excavate to three times the post width and one-third of the post height above ground.
Add water: Fill the hole with clean water to around one-third of its depth.
Pour in Postcrete: Add the dry mix directly into the hole, allowing it to absorb water evenly. Lightly sprinkle more water on top if required.
Align and level: Position the post immediately, ensuring it is straight and plumb.
Setting time: Mixture will begin to firm up within 5-10 minutes; fence panels may be fixed after approximately 10 minutes.
Finish: Once hardened, backfill around the post with soil or turf as required.
Compliance & Performance
Material specification: Pre-blended mix of cement, graded sand, and proprietary additives.
Setting time: Initial set achieved within 5-10 minutes under normal conditions.
Working temperature: Suitable for use in ambient temperatures above 3°C.
Compressive strength: Formulated for post-fixing and light structural applications.
Storage: Keep sealed in a dry place or store outside in original weatherproof bag.
Important note: Do not pre-mix with water manually or mechanically; product is designed to set in situ when combined with water in the hole.
Delivery & Returns Information
Delivery charges vary by product category and order value. Items may ship from different suppliers and arrive separately, so delivery charges can be shown per part of your order at checkout.
Standard (Nationwide) Delivery
Core Products
Core
ORDER VALUE
DELIVERY CHARGE
Under £200
ex. VAT
£15
ex. VAT
Over £200
ex. VAT
FREE
Core Delivery is our most competitive delivery fee. To qualify for Core Delivery, all the products in your basket need to be from our Core range. Core products have the Core icon next to their picture.
Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
ORDER VALUE
DELIVERY CHARGE
Under
£300
£30
ex. VAT
Over
£300
ex. VAT
FREE
Express Delivery
Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products
We work with a nationwide network of trusted suppliers. Items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you will see delivery charges shown at checkout for each part of your order. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery areas
Delivery charges apply to mainland UK, excluding: AB, CA, CF, DD, DG, EH, EX, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, PL, SA, SY, TR, TQ and TD.
If your address is in one of these areas, we will contact you before processing your order to confirm any additional costs. We do not currently offer delivery outside the UK mainland.
What to expect on delivery day
Deliveries are typically kerbside.
Please ensure someone is on-site to accept delivery. For heavier items, help with offloading may be required.
Many building materials arrive on large vehicles. If access is restricted, a specialist vehicle such as a HIAB may be required and could incur an additional charge.
Why delivery can cost more than typical parcel delivery
Building materials often travel on larger vehicles and usually carry fewer drops per run than parcel networks. That is why delivery charges can be higher than standard e-commerce shipping.
Returns
Returns depend on what you have bought and whether there is anything wrong with it. For full details on eligibility, timeframes, and exclusions, please see our full policy.
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