---
product_id: 426081502
title: "2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart Kit)"
brand: "fiberglass supply depot"
price: "€ 95.97"
currency: EUR
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.de/products/426081502-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: DE
region: Germany
---

# 2 lb density for superior buoyancy 5 min full cure time for rapid results Optimal expansion at 75-80°F 2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart Kit)

**Brand:** fiberglass supply depot
**Price:** € 95.97
**Availability:** ✅ In Stock

## Summary

> 🚤 Float, Fill, and Fix Fast — The 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 (Quart Kit) by fiberglass supply depot
- **How much does it cost?** € 95.97 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/426081502-2-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

- • **Fast-Acting Expansion:** Expands fully in just 5 minutes, letting you move quickly from application to use.
- • **Resin-Compatible Finish:** Cures solid and can be laminated with polyester, epoxy, or vinyl ester without damage.
- • **Water Resistant Durability:** Built to withstand moisture, making it ideal for marine and outdoor environments.
- • **Versatile Multi-Use Solution:** Perfect for soundproofing, insulation, void filling, and structural repairs.
- • **Lightweight Flotation Powerhouse:** 2 lb density closed-cell foam delivers unmatched buoyancy for boats and docks.

## Overview

This 2 lb density expanding polyurethane foam kit combines rapid 5-minute curing with superior closed-cell buoyancy, making it the go-to solution for boat flotation, soundproofing, insulation, and void filling. Designed for professional-grade applications, it’s water resistant and compatible with common resins, ensuring durable, versatile performance in marine and construction projects.

## Description

Product Description

Review: Quality 100% - Does as promised
Review: Works as advertised - Mixes easily, expands nicely, and cures quickly. More than meet expectations, good product

## 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.
- 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 Quart Kit; Consists of 1 pint of Part A and 1 pint of Part B and produces 1.25 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 | B08R7TX8QJ |
| Best Sellers Rank | 535,632 in DIY & Tools ( See Top 100 in DIY & Tools ) 442 in Expanding Foams |
| Brand | Fiberglass Supply Depot |
| Colour | Clear |
| Compatible Material | Foam |
| Container Type | Bottle |
| Customer Reviews | 4.4 out of 5 stars 167 Reviews |
| Full Cure Time | 5 Minutes |
| Global Trade Identification Number | 00819794022873 |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1 Quarts |
| Item Weight | 907 g |
| Item form | Liquid |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Manufacturer Part Number | poly2lbqk |
| Material | Foam , Resin |
| Model Number | poly2lbqk |
| Number of Pieces | 2 |
| Other Special Features of the Product | Water Resistant |
| Special feature | Water Resistant |
| Specific Uses For Product | Flooring, Repair, Wall Repair |
| Specific uses for product | Flooring, Repair, Wall Repair |
| UPC | 819794022873 |
| Viscosity Level | Medium |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Item form:** Liquid
- **Material:** Foam,Resin
- **Special feature:** Water Resistant
- **Specific uses for product:** Flooring, Repair, Wall Repair

## Images

![2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart Kit) - Image 1](https://m.media-amazon.com/images/I/81wNSh2ZNiL.jpg)
![2 Lb Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (Quart 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 (Quart 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 (Quart 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 (Quart Kit) - Image 5](https://m.media-amazon.com/images/I/81mbAHsaZfL.jpg)

## Questions & Answers

**Q: what is the storage shelf life?**
A: As long as it is in a cool dry place it should last about 6 months.

**Q: Is the blowing agent water or other?  Do you have a K value for the foam?**
A: There is no blowing agent. Water will cause the foam to not rise.

**Q: what is the proper storage temperature? pre mix.**
A: Stored in unopened, containers at temperatures between 10 - 32°C (50
- 90°F).

**Q: Can you spray these chemicals? step 1 in one bottle, step 2 in the second bottle..**
A: They do have special guns to be able to spray but if you tried to mix the two together and then try to spray you would have problems as this expands too fast.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality 100%
*by J***D on 12 August 2025*

Does as promised

### ⭐⭐⭐⭐⭐ Works as advertised
*by M***E on 3 December 2025*

Mixes easily, expands nicely, and cures quickly. More than meet expectations, good product

### ⭐⭐⭐⭐⭐ No Funnels!
*by D***D on 3 December 2024*

This stuff failed miserably for my application. It expands very quickly if you have any thoughts of using a funnel of any kind just forget it! despite my failings with it the foam itself is very strong and dose what it says just work fast and forget funnels! i made a simple funnel out of a sheet of cardboard to try and pour it into a hard to reach spot and it just foamed up in the funnel blocking it almost instantly.

## 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 (Quart Kit)
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- TotalBoat-510822 High Performance Epoxy Kit, Crystal Clear Marine Grade Resin and Hardener for Woodworking, Fiberglass and Wood Boat Building and Repair (Quart, Medium)

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**Shop now:** [https://www.desertcart.de/products/426081502-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed](https://www.desertcart.de/products/426081502-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-06-24*