---
product_id: 692715742
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: "€ 520.17"
currency: EUR
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.be/products/692715742-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: BE
region: Belgium
---

# 1.5 cu ft volume from 1 gallon kit 45 sec working time, 5 min full expansion 6 lb density for superior buoyancy 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:** € 520.17
**Availability:** ✅ In Stock

## Summary

> 🛠️ Float, fill, and fortify with foam that means business!

## 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?** € 520.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/692715742-6-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

- • **Precision Mixing:** Equal parts Part A & B with a critical 45-second working window ensures flawless results every time.
- • **Rapid Expansion Power:** Expands 4x liquid volume in just 5 minutes for fast, efficient filling and insulation.
- • **Rock-Solid Durability:** 6 lb density foam cures tough and resilient—perfect for flotation, soundproofing, and structural fills.
- • **Versatile Application:** Compatible with polyester, epoxy, and vinyl ester resins for seamless lamination and sculpting.
- • **Temperature-Optimized Performance:** Ideal at 75-80°F for maximum expansion and strength—engineered for professional-grade projects.

## Overview

This 1-gallon 2-part polyurethane foam kit delivers 6 lb density closed-cell foam that expands rapidly to 1.5 cubic feet, providing exceptional buoyancy, insulation, and soundproofing. Designed for professional use, it cures rock-solid and bonds well with common resins, making it ideal for boats, docks, carving, and filling voids. Precision mixing and temperature control are key to unlocking its full potential.

## Description

6lb poly foam

Review: Great - Works great for my taxidermy molds Expands roughly 4 times liquid amount and is rock solid ( 6lb )
Review: Very easy to use, good level of expansion and a decent material consistency when cured - I used this product to pour through a small hole into an area that an animal was attempting to dig under my deck. It expands pretty rapidly and you need to get it poured as fast as you can after mixing it. You have maybe a 60 second working time before it takes off. It expands very rapidly and voluminously. It filled the area with decently hard cured material. Just don't put it someplace fragile and confined, it will very happily push out thin wood on its way to full expansion. The end material seems acceptably durable. It builds a thin skin on itself and it's not easy to rip apart or dislodge. The resultant material also sticks aggressively to anything, so make sure you are ok with that. Also, don't get the pre-cured material on your hands; it sticks extremely well to human skin and it will be a pain to get off. Overall a great product for filling spaces!

## Features

- Flotation Foam is a polyurethane 2-part foam that, when mixed in equal parts and poured in place this foam will soundproof, insulate, or provide extra buoyancy.
- 6LB. Density polyurethane flotation Foam 1 Gallon Kit; Consists of 1/2 gallon of Part A and 1/2 gallon of Part B and produces 1.5 cubic feet.
- Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting.
- The 6LB density also works well in floating decoy or taxidermy applications as well as many other sculpting, casting, carving and other filling applications
- All expansion rates and times given are temperature critical. Temperatures below 75° F will lower the expansion rate therefore requiring more foam. Ideal working temperature is 75° to 80° F or above. Accurate measuring of these products is extremely critical. Working time before foaming: approx. 45 seconds Time before full expansion: approx. 5 minutes

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BBH4XQ9P |
| Brand | Fiberglass Supply Depot |
| Brand Name | Fiberglass Supply Depot |
| Country of Publication | USA |
| Customer Reviews | 4.4 out of 5 stars 187 Reviews |
| Global Trade Identification Number | 00819794023221 |
| Item Weight | 2.72 kg |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Manufacturer Part Number | FBACPOLY6LBGK |
| Material | Resin |
| Material Type | Resin |
| Model Number | FBACPOLY6LBGK |
| Net Quantity | 128 Fluid Ounces |
| Number of Items | 1 |
| Unit Count | 128 Fluid Ounces |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Item Form:** Liquid
- **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)

## 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 )

### ⭐⭐⭐⭐⭐ Very easy to use, good level of expansion and a decent material consistency when cured
*by B***S on 16 August 2024*

I used this product to pour through a small hole into an area that an animal was attempting to dig under my deck. It expands pretty rapidly and you need to get it poured as fast as you can after mixing it. You have maybe a 60 second working time before it takes off. It expands very rapidly and voluminously. It filled the area with decently hard cured material. Just don't put it someplace fragile and confined, it will very happily push out thin wood on its way to full expansion. The end material seems acceptably durable. It builds a thin skin on itself and it's not easy to rip apart or dislodge. The resultant material also sticks aggressively to anything, so make sure you are ok with that. Also, don't get the pre-cured material on your hands; it sticks extremely well to human skin and it will be a pain to get off. Overall a great product for filling spaces!

### ⭐⭐⭐⭐⭐ 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

## 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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- 4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit)

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**Shop now:** [https://www.desertcart.be/products/692715742-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed](https://www.desertcart.be/products/692715742-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-08-21*