---
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: "543 zł"
currency: PLN
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.pl/products/426081502-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: PL
region: Poland
---

# Water resistant closed-cell foam 5 min full cure time 2 lb density for optimal buoyancy 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:** 543 zł
**Availability:** ✅ In Stock

## Summary

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

## 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?** 543 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/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

- • **Rapid 5-Minute Cure:** Get your project moving fast with quick foam set
- • **Precision 2-Part Mix:** Equal parts A & B for flawless expansion every time
- • **Resin-Compatible Finish:** Laminates seamlessly with polyester, epoxy, or vinyl ester
- • **Temperature-Smart Formula:** Works best at 75-80°F for maximum expansion efficiency
- • **Versatile Flotation & Insulation:** Perfect for boats, docks, soundproofing & void filling

## Overview

This 2 lb density expanding pour foam is a two-part polyurethane closed-cell liquid foam kit designed for superior flotation, soundproofing, insulation, and void filling. It cures fully in 5 minutes, is water resistant, and can be laminated with common resins, making it ideal for boat and dock applications as well as general repair and insulation projects.

## Description

Shop at desertcart.co.uk for 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) : DIY & Tools.

Review: Quality 100%
Review: Works as advertised

## 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 | 491,248 in DIY & Tools ( See Top 100 in DIY & Tools ) 409 in Expanding Foams |
| Brand | Fiberglass Supply Depot |
| Colour | Clear |
| Compatible Material | Foam |
| Container Type | Bottle |
| Customer Reviews | 4.4 out of 5 stars 164 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. |
| Material | Foam , Resin |
| Model Number | poly2lbqk |
| 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 | 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)

## 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*



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



### ⭐⭐⭐⭐⭐ Worked beautifully
*by X***L on 12 August 2025*



## 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.pl/products/426081502-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed](https://www.desertcart.pl/products/426081502-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-18*