---
product_id: 17019209
title: "Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence, 1)"
brand: "h.b. fuller"
price: "₨26421"
currency: LKR
in_stock: true
reviews_count: 7
category: "H.B. Fuller"
url: https://www.desertcart.lk/products/17019209-fast-2k-post-anchor-mix-expanding-composite-footing-compound-fence
store_origin: LK
region: Sri Lanka
---

# 2.5lb replaces 80lbs concrete Sets in 5 minutes, build in 30 -5°F to 105°F use range Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence, 1)

**Brand:** h.b. fuller
**Price:** ₨26421
**Availability:** ✅ In Stock

## Summary

> 🚀 Fast, strong, and effortless—anchor your projects like a pro!

## Quick Answers

- **What is this?** Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence, 1) by h.b. fuller
- **How much does it cost?** ₨26421 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/17019209-fast-2k-post-anchor-mix-expanding-composite-footing-compound-fence)

## 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

- • **Speed Demon Setup:** Mix in 30 seconds, set in 5, and build on your post within 30 minutes—time is money.
- • **Rot-Resistant Grip:** Hydrophobic formula clings tight to prevent rot and corrosion, extending post life.
- • **All-Weather Warrior:** Reliable performance from freezing -5°F to scorching 105°F—no weather delays.
- • **Code-Ready Strength:** Meets building codes for load-bearing foundations—professional-grade peace of mind.
- • **Lightweight Powerhouse:** Ditch the heavy 80lb concrete bags—just 2.5lbs for the same strength.

## Overview

Fast 2K Post Anchor Mix is a lightweight, expanding composite footing compound that replaces traditional concrete with just 2.5lbs per bag. It sets rapidly—within 5 minutes—and supports building on posts in 30 minutes, working reliably across a wide temperature range (-5°F to 105°F). Its hydrophobic technology prevents rot and corrosion, making it ideal for wood, metal, and vinyl posts in fences, decks, mailboxes, and more. This product meets building code requirements for load-bearing applications, delivering professional-grade strength with minimal effort.

## Description

H.B. Fuller Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence, 1): desertcart.com: Industrial & Scientific

Review: Fast, Reliable, and Easy to Use! - 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!
Review: Crazy stuff, but it works great! - I got this to secure my mailbox post in the ground. The post needed to be dug up and raised recently and I came across this product when looking for some kind of cement to make sure it stays put after this second install. It was very easy to mix up and pour out. We were mesmerized by the process of the liquid becoming the hardened foam type end result. Very cool to watch. After about a half hour, it was pretty firmed up. A bunch had come up higher than we wanted, but we covered it with rocks to hide it. It seems very sturdy after several weeks have passed. Hopefully it holds up through the winter. It was a little hard to remove from skin, so make sure everyone helping is wearing gloves too - they'll thank you later. They do include them in the package which is convenient. Overall, this was an inexpensive and quick way to do the job. I recommend. Update: it has been almost a year and it is still sturdy. No change over the winter at all. Looks like it's going to hold up just fine.

## Features

- SAVE YOUR BACK: Lightweight technology replaces 80lbs of concrete with a 2.5lb bag
- FAST & SECURE: Can be used in ambient temperatures ranging from -5°F to 105°F. Mixes in 30 seconds, sets in 5 minutes, build on post in 30 minutes. Product does not require water or any additives.
- EXPANDING COMPOSITE TECHNOLOGY: Works with multiple post materials and projects: wood, metal and vinyl, decks, fences, mailboxes, pole barns, and more.
- HYDROPHOBIC TO PREVENT ROT: Adheres to post assisting in prevention of rot or corrosion.
- PRO TECHNOLOGY: Meets building code requirements for special foundations and load-bearing elements.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00LAFUC34 |
| Best Sellers Rank | #45,641 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #47 in Decking & Fencing Materials |
| Date First Available | June 25, 2014 |
| Department | Unisex-Adult |
| Is Discontinued By Manufacturer | No |
| Item Diameter | 3.05 Centimeters |
| Item Form | Foam |
| Item Weight | 2.5 pounds |
| Item model number | 254-20-S |
| Manufacturer | H.B. Fuller |
| Number of Items | 1 |
| Specification Met | True |
| UPC | 713976908484 669602000322 |

## Product Details

- **Brand:** H.B. Fuller
- **Color:** Yellow
- **Item dimensions L x W x H:** 1.5 x 8.5 x 7.5 inches
- **Material:** Adhesive, Sealant
- **Shape:** Rectangular Prism

## Images

![Fast 2K Post Anchor Mix | Expanding Composite Footing Compound (Fence, 1) - 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

### ⭐⭐⭐⭐⭐ Fast, Reliable, and Easy to Use!
*by A***4 on May 8, 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!

### ⭐⭐⭐⭐⭐ Crazy stuff, but it works great!
*by L***E on October 19, 2023*

I got this to secure my mailbox post in the ground. The post needed to be dug up and raised recently and I came across this product when looking for some kind of cement to make sure it stays put after this second install. It was very easy to mix up and pour out. We were mesmerized by the process of the liquid becoming the hardened foam type end result. Very cool to watch. After about a half hour, it was pretty firmed up. A bunch had come up higher than we wanted, but we covered it with rocks to hide it. It seems very sturdy after several weeks have passed. Hopefully it holds up through the winter. It was a little hard to remove from skin, so make sure everyone helping is wearing gloves too - they'll thank you later. They do include them in the package which is convenient. Overall, this was an inexpensive and quick way to do the job. I recommend. Update: it has been almost a year and it is still sturdy. No change over the winter at all. Looks like it's going to hold up just fine.

### ⭐⭐⭐⭐ Outstanding Product — Permanently Part of Your Life (and Hands)
*by C***6 on January 7, 2026*

This stuff works extremely well. The H.B. Fuller Fast 2K Post Anchor Mix sets fast, expands properly, and locks posts in place like they’re never moving again. From a performance standpoint, it’s fantastic and does exactly what it promises. That said… be prepared. Once you start using it, there’s a very real chance you’ll be wearing it for the next month. If it touches your hands, clothes, tools, soul—congrats, it now belongs there. Gloves are not optional unless you enjoy explaining to people why your hands look like a DIY crime scene. Overall, it’s an outstanding product and incredibly effective. Just plan ahead, suit up properly, and accept that cleanup is more of a commitment than a task.

## 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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**Shop now:** [https://www.desertcart.lk/products/17019209-fast-2k-post-anchor-mix-expanding-composite-footing-compound-fence](https://www.desertcart.lk/products/17019209-fast-2k-post-anchor-mix-expanding-composite-footing-compound-fence)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-06*