---
product_id: 334097086
title: "Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound"
brand: "h.b. fuller"
price: "€ 93.69"
currency: EUR
in_stock: true
reviews_count: 5
category: "H.B. Fuller"
url: https://www.desertcart.fi/products/334097086-fast-2k-fence-post-mix-and-concrete-alternative-and-replacement
store_origin: FI
region: Finland
---

# Sets in 15 minutes Hydrophobic, prevents rot Adheres to wood, vinyl & metal Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound

**Brand:** h.b. fuller
**Price:** € 93.69
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your fence game with pro-speed, pro-strength, and zero hassle!

## Quick Answers

- **What is this?** Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound by h.b. fuller
- **How much does it cost?** € 93.69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/334097086-fast-2k-fence-post-mix-and-concrete-alternative-and-replacement)

## Best For

- h.b. fuller enthusiasts

## Why This Product

- Trusted h.b. fuller brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Set & Ready:** Mixes in seconds and builds strong in 15 minutes—no water, no mess, no waiting.
- • **Pro-Grade Strength:** Uses the same expanding composite tech trusted by utility pole pros for unmatched durability.
- • **Lightweight Powerhouse:** Replaces 80-100 lbs of concrete with just 2.5 lbs—save your back and your time.
- • **Universal Compatibility:** Bonds seamlessly with wood, vinyl, and metal posts for versatile, secure installations.
- • **Waterproof & Rot-Resistant:** Hydrophobic formula protects posts from water damage, rust, and decay—long-lasting fence health.

## Overview

Fast 2K Fence Post Mix is a 32.8 oz lightweight expanding composite compound that replaces traditional concrete for fence and mail post installations. It sets in just 15 minutes without water or mess, offers superior strength with professional-grade technology, and features a hydrophobic formula that prevents water damage and rot, ensuring durable, long-lasting post support.

## Description

H.B. Fuller Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound : desertcart.ae: Tools & Home Improvement

Review: Worked great for 4x6 fence posts. I tried Fast 2K and another brand for my fence. Fast 2K is far superior. Be careful not to make the hole wider or deeper than necessary or you’ll end up using more than is needed. It sets up quick and holds up strong.
Review: It's a great product. Very easy to use and it sets like concrete.

## Features

- SAVE YOUR BACK: Quick, lightweight patent pending technology replaces 80-100lbs of concrete with a lightweight bag that does not require messy mixing with water that requires cleanup & preparation for filling post holes
- FAST & SECURE: Ready to build in 15 minutes, and mixes in seconds in place and in the bag. All that you need in a compact and lightweight 32.8 oz bag that mixes into a waterproof protection for your fence posts.
- PRO TECHNOLOGY: It's the same technology used to set utility poles by the professionals. Now you can quickly and securely set your fence posts and mail posts with a minimum of fuss & mess securely.
- EXPANDING COMPOSITE TECHNOLOGY: Fast 2K Fence Post Backfill uses an expanding composite technology which is stronger than traditional concrete. Designed to adhere to wood, Vinyl and metal posts.
- HYDROPHOBIC TO PREVENT ROT: Unlike concrete which absorbs water which can damage metal and wood, the Fast 2K product is waterproof and hydrophobic which prevents water from getting into your posts, reducing rot, rust, deterioration and other water-related damage.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00LAFUC34 |
| Department | Unisex-Adult |
| Item form | Foam |
| Item model number | 254-20-S |
| Item weight | 2.5 Pounds |
| Manufacturer | H.B. Fuller |
| Number of Items | 1 |
| Product Dimensions | 3.81 x 21.59 x 19.05 cm; 1.13 kg |
| UPC | 713976908484 669602000322 |

## Product Details

- **Brand:** H.B. Fuller
- **Colour:** No Color
- **Item dimensions L x W x H:** 38 x 216 x 191 millimeters
- **Material:** Adhesive, Sealant
- **Shape:** rotondo

## Images

![Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound - Image 1](https://m.media-amazon.com/images/I/41S0b3GtQZL.jpg)

## Available Options

This product comes in different **Item Package Quantity, Style** options.

## Questions & Answers

**Q: Could this be used to fill a plaster of Paris mold?**
A: Not that I'm aware of, it doesn't really say on the package but it does sit up very fast and is very durable. Sorry but that's the best I can answer your question.

**Q: Could this be used to hold an 8x8 supporting a substantial weight?**
A: I had to replace a 4x4 post for my mailbox and used this 2K Post Back Fill. I already had a deep hole in the cement, so this stuff fills up the gaps beautifully all around and keep the post solidly planted. I'm not sure about 8x8, weight is not the issue here but you would need a "solid" hole like in my case to hold to post, then this foam would then fill up any gaps. Good luck.

**Q: Can this be used to form the deck list foundation where the 8x8 post then sits on top held by a bracket anchored in the foundation?**
A: No, Fast 2K can only be used for installing posts that are sunk into the ground.  It cannot be used as a foundation material nor can any brackets be anchored into it.

**Q: Would this be good to use for posts for a horse fence strong and sturdy?**
A: Yes, also sets up quick and should be good for a horse fence.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***D on 22 December 2024*

Worked great for 4x6 fence posts. I tried Fast 2K and another brand for my fence. Fast 2K is far superior. Be careful not to make the hole wider or deeper than necessary or you’ll end up using more than is needed. It sets up quick and holds up strong.

### ⭐⭐⭐⭐⭐ Review
*by R***T on 29 May 2025*

It's a great product. Very easy to use and it sets like concrete.

### ⭐⭐⭐⭐⭐ Review
*by A***4 on 8 May 2025*

Fast 2K Fence Post Mix exceeded my expectations! I was looking for an alternative to traditional concrete that would save me time and effort, and this product delivered. The setup process was incredibly simple—just mix, pour, and let it set. Within minutes, the post was firmly in place, and I didn't have to deal with heavy bags of concrete or long curing times. I also appreciate that it expands to create a strong and stable hold, making it ideal for fence posts and other outdoor projects. Plus, it's lightweight and easy to store, which is a huge bonus. If you're looking for a fast, mess-free way to secure posts without the hassle of concrete, this is the perfect solution. Highly recommended!

## Frequently Bought Together

- Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound
- Johnson Level & Tool 175-O Orange Post & Pipe Level, 4" x 5" x 9", Orange, 1 Level

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-08*