---
product_id: 423761959
title: "2 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)"
brand: "fiberglass supply depot"
price: "₩473822"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/423761959-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: KR
region: South Korea
---

# 5 min full expansion time 2 lb density for optimal buoyancy 95-98% closed cell water resistance 2 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)

**Brand:** fiberglass supply depot
**Price:** ₩473822
**Availability:** ✅ In Stock

## Summary

> 🚤 Float Above the Rest with Foam That Works as Hard as You Do!

## Quick Answers

- **What is this?** 2 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) by fiberglass supply depot
- **How much does it cost?** ₩473822 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/423761959-2-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

- • **Rapid 5-Minute Cure:** Fast foaming and curing to keep your projects on schedule
- • **Precision 2-Part Mix:** Equal parts A & B for flawless expansion every time
- • **Versatile Application:** Ideal for soundproofing, insulation, void filling, and structural buoyancy
- • **Superior Flotation Power:** Supports 480-600 lbs/gal buoyancy—perfect for boats & docks
- • **Water-Resistant Closed Cells:** Nearly impermeable foam that resists water absorption and decay

## Overview

This 2 lb density, 2-part polyurethane closed cell foam kit delivers 5 cubic feet of high-performance expanding foam designed for flotation, soundproofing, insulation, and void filling. Tested to U.S. Coast Guard standards, it offers rapid 5-minute expansion, exceptional water resistance (95-98% closed cells), and compatibility with polyester, epoxy, or vinyl ester resins—making it the go-to solution for professional-grade marine and construction projects.

## Description

2 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)

## 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.
- This expandable foam is recommended for void filling in nonstructural applications. It can be poured underneath decks and inside cavities where a lightweight flotation foam is needed to provide buoyancy.
- 2# Density polyurethane flotation Foam 1 Gallon Kit; Consists of 1/2 gallon of Part A and 1/2 gallon of Part B and produces 5 cubic feet.
- Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting.
- 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 |
|---------------|-------|
| Manufacturer | Fiberglass Supply Depot Inc. |
| Part number | Poly2lbgk |
| Item Weight | 4.79 kg |
| Package Dimensions | 25.91 x 23.8 x 17.09 cm; 4.79 kg |
| Item model number | Poly2lbgk |
| Size | Gallon Kit |
| Colour | white |
| Material | Resin |
| Item Package Quantity | 1 |
| Number of Pieces | 2 |
| Special Features | Closed Cell Foam |
| Specific uses | Flooring, Furniture, Repair, Sink, Wall Repair, Wood, Woodworking |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Specific uses for product:** Flooring, Furniture, Repair, Sink, Wall Repair, Wood, Woodworking
- **Material:** Resin
- **Item form:** Liquid
- **Special feature:** Closed Cell Foam

## Images

![2 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) - Image 1](https://m.media-amazon.com/images/I/81ib1TuKHEL.jpg)
![2 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) - Image 2](https://m.media-amazon.com/images/I/8189VtbwU2L.jpg)
![2 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) - Image 3](https://m.media-amazon.com/images/I/71Gbm9XW+IL.jpg)
![2 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) - Image 4](https://m.media-amazon.com/images/I/71Jn4WV0S0L.jpg)
![2 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) - Image 5](https://m.media-amazon.com/images/I/81mbAHsaZfL.jpg)

## Questions & Answers

**Q: Can the Part B liquid be colored so that the expanded foam will be a color other than beige?**
A: unknown 
It can be painted.

**Q: can this be cut with hot wire ?**
A: Yes, but it is high density. It will not cut as easily as Styrofoam

**Q: Does this require moisture to cure?**
A: This will not cure with moisture present.

**Q: whats the difference between 2#,4# & 6#? is the polyurethane hydrophobic or hydrophilic?**
A: To clarify, each density of foam has a different expansion rate, so they are all used for different applications. Please refer to the reference chart of each listing for details regarding expansion.

This material is hydrophobic.

-FSD

## Frequently Bought Together

- 2 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.kr/products/423761959-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed](https://www.desertcart.kr/products/423761959-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-02*