---
product_id: 643122463
title: "Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam"
brand: "h.b. fuller"
price: "KSh81810"
currency: KES
in_stock: true
url: https://www.desertcart.co.ke/products/643122463-fast-2k-deck-post-mix-2-pack-expanding-foam-concrete
store_origin: KE
region: Kenya
---

# Fast 15-min set time Hydrophobic, waterproof protection Adheres to wood, vinyl & metal Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam

**Brand:** h.b. fuller
**Price:** KSh81810
**Availability:** ✅ In Stock

## Summary

> 🚀 Set it, forget it, and build like a pro!

## Quick Answers

- **What is this?** Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam by h.b. fuller
- **How much does it cost?** KSh81810 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/643122463-fast-2k-deck-post-mix-2-pack-expanding-foam-concrete)

## 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

- • **Waterproof & Rot-Resistant:** Hydrophobic formula protects posts from rot, rust, and water damage for lasting durability.
- • **Build in Minutes, Not Hours:** Ready to build in just 15 minutes with instant in-bag mixing technology.
- • **Save Your Back, Not Just Your Time:** Lightweight 2.5lb bags replace 80-100lbs of concrete—no mixing, no mess.
- • **Pro-Grade Strength at Your Fingertips:** Uses the same expanding composite tech trusted by utility pole pros.
- • **Stronger Than Concrete, Lighter Than Ever:** Expands to securely lock posts while being easier to handle than traditional concrete.

## Overview

Fast 2K Deck Post Mix is a revolutionary lightweight expanding foam alternative to concrete, designed for quick, mess-free installation of deck, fence, mailbox, and playground posts. Each 2.5lb bag sets in 15 minutes, providing waterproof, rot-resistant, and professional-grade strength that adheres to wood, vinyl, and metal. Trusted technology used by utility pole installers now available for your DIY projects.

## Description

Full description not available

## 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 2.5lb bag that mixes into a waterproof protection for your deck post, fence post, mailbox, and playground equipment
- 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 Deck 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 Deck 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 |
|---------------|-------|
| Item Form | Bag |
| Item Weight | 2.5 Pounds |
| UPC | 717389000278 |
| Number of Items | 2 |
| Manufacturer | H.B. Fuller |
| Country of Origin | USA |
| Model number | 10016571 |
| Item Weight | 1 kg 130 g |
| Product Dimensions | 15.24 x 25.4 x 30.48 cm; 1.13 kg |
| Item model number | 10016571 |
| Item Height | 12 Inches |
| Item Width | 10 Inches |
| Are batteries included? | No |

## Product Details

- **Material:** Composite
- **Brand:** H.B. Fuller
- **Item dimensions L x W x H:** 15.2 x 25.4 x 30.5 Centimeters
- **Colour:** Yellow
- **Shape:** Rectangular Prism

## Images

![Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam - Image 1](https://m.media-amazon.com/images/I/817F70bhcdL.jpg)
![Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam - Image 2](https://m.media-amazon.com/images/I/71a5hYNz-NL.jpg)
![Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam - Image 3](https://m.media-amazon.com/images/I/81W-QlCbNZL.jpg)
![Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam - Image 4](https://m.media-amazon.com/images/I/81xHqBI6O5L.jpg)
![Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam - Image 5](https://m.media-amazon.com/images/I/719lmDYCxfL.jpg)

## Available Options

This product comes in different **Size, Style Name** 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.

## Frequently Bought Together

- H.B. Fuller Fast 2K Deck Post Mix - 2 Pack | Expanding Foam Concrete Alternative for Deck, Fence, Mailbox & Playground Equipment Installs. Fast-Setting, Post Foam
- 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 Kenya*
*Store origin: KE*
*Last updated: 2026-03-10*