---
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 (1/2 Gallon Kit)"
brand: "fiberglass supply depot"
price: "2099 kr"
currency: NOK
in_stock: true
category: "Fiberglass Supply Depot"
url: https://www.desertcart.no/products/423761959-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: NO
region: Norway
---

# 5 cubic feet coverage 5 min full expansion 2 lbs lightweight density 2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1/2 Gallon Kit)

**Brand:** fiberglass supply depot
**Price:** 2099 kr
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate your projects with foam that fills, floats, and fortifies!

## 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 (1/2 Gallon Kit) by fiberglass supply depot
- **How much does it cost?** 2099 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/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

- • **Precision 2-Part Mix:** Exact 1:1 ratio for flawless foam activation every time
- • **Versatile Application:** Perfect for flotation, soundproofing, insulation, and void filling
- • **Rapid Expansion & Cure:** Fully expands in 5 minutes to save you time on projects
- • **Resin-Compatible Finish:** Cures to a surface ready for polyester, epoxy, or vinyl ester laminates
- • **Temperature-Optimized Performance:** Ideal working temp 75-80°F ensures max expansion and strength

## Overview

Fiberglass Supply Depot’s 2-pound 2-part closed cell polyurethane foam delivers 5 cubic feet of lightweight, rapidly expanding foam designed for boat flotation, soundproofing, thermal insulation, and void filling. Its precise 1:1 mix ratio and compatibility with common resins make it a versatile, professional-grade solution optimized for use at 75-80°F.

## Description

Shop 2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1/2 Gallon Kit). Free delivery on eligible orders of £20 or more.

## Features

- Causes serious eye irritation.
- 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.
- 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 1/2 Gallon Kit; Consists of 1 quart of Part A and 1 quart of Part B and produces 2.5 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 |
|---------------|-------|
| ASIN | B08R6C4HBL |
| Best Sellers Rank | 78,667 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 288 in Foam Raw Materials |
| Brand | Fiberglass Supply Depot |
| Coverage | 2.5 cubic feet |
| Customer Reviews | 4.5 4.5 out of 5 stars (477) |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material | Polyurethane |
| Model Number | Poly2lb1/2gk |
| Number of Items | 2 |
| Number of Packs | 1 |
| Part Number | Poly2lb1/2gk |
| Recommended Uses For Product | soundproofing, insulation, buoyancy, void filling |
| UPC | 819794022866 |
| Unit Count | 2.0 count |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Manufacturer:** Fiberglass Supply Depot Inc.
- **Material:** Polyurethane
- **Number of Packs:** 1
- **Recommended uses for product:** soundproofing, insulation, buoyancy, void filling

## Images

![2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1/2 Gallon Kit) - Image 1](https://m.media-amazon.com/images/I/41iL273U+-L.jpg)
![2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1/2 Gallon Kit) - Image 2](https://m.media-amazon.com/images/I/519cSzhqfkL.jpg)
![2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1/2 Gallon Kit) - Image 3](https://m.media-amazon.com/images/I/41cVcze5RmL.jpg)
![2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1/2 Gallon Kit) - Image 4](https://m.media-amazon.com/images/I/41z05kTc6bL.jpg)
![2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1/2 Gallon Kit) - Image 5](https://m.media-amazon.com/images/I/41S-u-+aQ2L.jpg)

## Available Options

This product comes in different **Size** options.

## 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.no/products/423761959-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed](https://www.desertcart.no/products/423761959-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-11-13*