---
product_id: 684403191
title: "6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit)"
brand: "fiberglass supply depot"
price: "10046841₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.vn/products/684403191-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: VN
region: Vietnam
---

# 6 lb density = rock-solid strength Expands 4x volume for max coverage Closed-cell foam = water & sound resistant 6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit)

**Brand:** fiberglass supply depot
**Price:** 10046841₫
**Availability:** ✅ In Stock

## Summary

> 🛠️ Expand your project’s potential with foam that’s as tough as you are!

## Quick Answers

- **What is this?** 6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) by fiberglass supply depot
- **How much does it cost?** 10046841₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/684403191-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

## Best For

- fiberglass supply depot enthusiasts

## Why This Product

- Trusted fiberglass supply depot brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quadruple Expansion:** Expands up to 4 times its liquid volume, ensuring efficient filling and insulation with less waste.
- • **Rock-Solid Strength:** 6 lb density foam delivers unmatched durability and support for demanding projects.
- • **Fast-Setting Formula:** Quick curing time means your project moves forward without delay—just prep and pour.
- • **Versatile Application:** Ideal for insulation, void filling, soundproofing, and flotation—one kit, endless possibilities.
- • **Waterproof & Soundproof:** Closed-cell structure provides superior buoyancy and noise reduction—perfect for boats and docks.

## Overview

This 6 lb density, 2-part polyurethane closed-cell expanding foam kit expands 4x its liquid volume to provide durable, waterproof, and soundproof insulation. Perfect for boat flotation, dock repairs, sound dampening, and filling voids, it cures quickly into a rock-solid, stable barrier that enhances structural integrity and energy efficiency.

## Description

Product Description

Review: Great - Works great for my taxidermy molds Expands roughly 4 times liquid amount and is rock solid ( 6lb )
Review: Performed exactly as advertised. - Used this to insulate around a bathtub and it worked great. The foam expanded exactly as expected and provided a solid, supportive fill without over-expanding or creating pressure issues. Once cured, it formed a dense, durable barrier that helps with both insulation and soundproofing. Just be sure to follow the mixing directions carefully and prep your area—it sets fast. Highly recommend for home projects where a strong, stable fill is needed

## Features

- Causes skin irritation.
- Harmful if inhaled.
- May cause allergy or asthma symptoms or breathing difficulties if inhaled.
- May cause an allergic skin reaction.
- May cause damage to organs (respiratory tract) through prolonged or repeated exposure (if inhaled).
- May cause respiratory irritation.
- Soundproofing, Insulation, Buoyancy

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BBH4XQ9P |
| Best Sellers Rank | 501,287 in DIY & Tools ( See Top 100 in DIY & Tools ) 408 in Expanding Foams |
| Brand | Fiberglass Supply Depot |
| Coverage | 1.5 cubic feet |
| Customer Reviews | 4.4 out of 5 stars 189 Reviews |
| Global Trade Identification Number | 00819794023221 |
| Item Weight | 6 Pounds |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material | Resin |
| Model Number | FBACPOLY6LBGK |
| Number of Packs | 1 |
| Part Number | FBACPOLY6LBGK |
| Recommended Uses For Product | Boat and Dock Flotation, Soundproofing, Filling Voids, Insulation |
| Recommended uses for product | Boat and Dock Flotation, Soundproofing, Filling Voids, Insulation |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Item form:** Liquid, Solid
- **Material:** Resin
- **Special feature:** Soundproofing, Insulation, Buoyancy
- **Specific uses for product:** Boats, Dock Flotation, Soundproofing, Filling Voids, Insulation

## Images

![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) - Image 1](https://m.media-amazon.com/images/I/61Gi2RbcrRL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) - Image 2](https://m.media-amazon.com/images/I/81onsl4rjEL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) - Image 3](https://m.media-amazon.com/images/I/71vQaydgXGL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) - Image 4](https://m.media-amazon.com/images/I/81s3RjkkMiL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit) - Image 5](https://m.media-amazon.com/images/I/71fqAimxMaL.jpg)

## Questions & Answers

**Q: could this me used for settng fence posts?**
A: This foam is very strong & it will bond doesn't soak in ground I would not be afraid to use as a fence post filler.

**Q: Will this skin inside a mold? Self skinning without direct air or moisture exposure for casting.**
A: No this will not set up without air

**Q: What is the shelf life of this product?**
A: Approximately 6 months from the manufacture date.

**Q: Will this work for archery targets?**
A: Yes this foam will expand to fill in shot out areas on a foam target you can sand flush once it hardens let it set up for about an hour

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great
*by Z***N on 26 November 2025*

Works great for my taxidermy molds Expands roughly 4 times liquid amount and is rock solid ( 6lb )

### ⭐⭐⭐⭐⭐ Performed exactly as advertised.
*by H***S on 2 May 2025*

Used this to insulate around a bathtub and it worked great. The foam expanded exactly as expected and provided a solid, supportive fill without over-expanding or creating pressure issues. Once cured, it formed a dense, durable barrier that helps with both insulation and soundproofing. Just be sure to follow the mixing directions carefully and prep your area—it sets fast. Highly recommend for home projects where a strong, stable fill is needed

### ⭐⭐⭐⭐⭐ Exactly what I needed for my project
*by B***R on 4 June 2026*

Replaced foam under floorboards in my boat and this product worked extremely well.

## Frequently Bought Together

- 6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit)
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**Shop now:** [https://www.desertcart.vn/products/684403191-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed](https://www.desertcart.vn/products/684403191-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-07-04*