---
product_id: 468433268
title: "Fiberglass Supply Depot 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: "¥42976"
currency: JPY
in_stock: true
reviews_count: 13
category: "Fiberglass Supply Depot"
url: https://www.desertcart.jp/products/468433268-fiberglass-supply-depot-6-lb-density-expanding-pour-foam-2
store_origin: JP
region: Japan
---

# 45 sec working time, 5 min full expansion 6 lb density for durable, stable foam 1.5 cu ft coverage ideal for flotation & insulation Fiberglass Supply Depot 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:** ¥42976
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your craft with foam that works as fast and smart as you do!

## Quick Answers

- **What is this?** Fiberglass Supply Depot 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?** ¥42976 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/468433268-fiberglass-supply-depot-6-lb-density-expanding-pour-foam-2)

## 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

- • **Rapid Work Cycle:** Mix and pour with a 45-second working window and full cure in just 5 minutes—perfect for efficient pros.
- • **Seamless Resin Compatibility:** Laminates flawlessly with polyester, epoxy, or vinyl ester resins without melting or warping.
- • **Temperature-Optimized Expansion:** Designed for ideal results at 75-80°F, ensuring consistent density and minimal waste.
- • **Versatile Multi-Use Performance:** Soundproof, insulate, float, carve, or fill voids with one high-performance kit.
- • **Precision Density for Maximum Stability:** 6 lb closed-cell foam ensures robust, non-deforming structure for demanding projects.

## Overview

Fiberglass Supply Depot’s 6 lb density expanding pour foam is a premium 2-part polyurethane closed-cell liquid foam kit delivering 1.5 cubic feet of durable, stable foam. Engineered for professionals, it offers rapid curing, excellent resin compatibility, and versatile applications from boat flotation to soundproofing and sculpting, making it the go-to solution for high-performance insulation and filling needs.

## Description

Fiberglass Supply Depot 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): desertcart.com: Industrial & Scientific

Review: Use it for art! - Drys and starts expanding pretty quickly so you’ve got to work fast once you mix them. I use it for art stuff. Pretty cool to work with, a little pricey, but what isn’t these days.
Review: Very good product. - Good stuff, There's definitely a learning curve, but that's on me. Using between thin fiberglass sheets (Boston Whaler resto) I appreciate it's ability to maintain some density even when allowed to expand freely, without deforming the skin.

## 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. If you want a high expanding foam look at our 2lb foam. 6lb foam does not expand much from its liqued state.
- 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 |
| Best Sellers Rank | #33,583 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #67 in Urethane Adhesives |
| Brand | Fiberglass Supply Depot |
| Brand Name | Fiberglass Supply Depot |
| Coverage | 1.5 cubic feet |
| Customer Reviews | 4.4 out of 5 stars 197 Reviews |
| Global Trade Identification Number | 00819794023221 |
| Item Weight | 6 pounds |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Manufacturer Part Number | FBACPOLY6LBGK |
| Material | Foam,Resin |
| Material Type | Foam,Resin |
| Model Number | FBACPOLY6LBGK |
| Number of Items | 1 |
| Number of Packs | 1 |
| Recommended Uses For Product | Soundproofing, Insulation, Flotation, Filling Voids, Sculpting, Casting |
| Unit Count | 128 Fluid Ounces |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Global Trade Identification Number:** 00819794023221
- **Material:** Foam,Resin
- **Number of Packs:** 1
- **Recommended Uses For Product:** Soundproofing, Insulation, Flotation, Filling Voids, Sculpting, Casting

## Images

![Fiberglass Supply Depot 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)
![Fiberglass Supply Depot 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)
![Fiberglass Supply Depot 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)
![Fiberglass Supply Depot 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)
![Fiberglass Supply Depot 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

### ⭐⭐⭐⭐⭐ Use it for art!
*by K***E on August 20, 2026*

Drys and starts expanding pretty quickly so you’ve got to work fast once you mix them. I use it for art stuff. Pretty cool to work with, a little pricey, but what isn’t these days.

### ⭐⭐⭐⭐⭐ Very good product.
*by E***H on July 26, 2026*

Good stuff, There's definitely a learning curve, but that's on me. Using between thin fiberglass sheets (Boston Whaler resto) I appreciate it's ability to maintain some density even when allowed to expand freely, without deforming the skin.

### ⭐⭐⭐⭐⭐ Very sturdy and quick forming.
*by O***M on September 1, 2026*

Glad I got this for rudder repair, it’s helped reshape the rudder so far a lot.

## 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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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-14*