---
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: "18537 kr"
currency: ISK
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.is/products/426081502-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: IS
region: Iceland
---

# 95-98% closed cell water resistance 5 min full expansion 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:** 18537 kr
**Availability:** ✅ In Stock

## Summary

> 🚤 Float Above the Rest with Next-Level Expanding Foam!

## 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?** 18537 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/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

- • **Versatile Application:** Ideal for soundproofing, insulation, void filling, and flotation—engineered for nonstructural marine and construction needs.
- • **Rapid Expansion & Cure:** Expands fully in just 5 minutes with a 45-second working window—speed meets efficiency on your projects.
- • **Resin-Compatible Finish:** Fully cured foam can be laminated with polyester, epoxy, or vinyl ester resins without melting—seamless integration guaranteed.
- • **Precision Buoyancy Boost:** Lightweight 2 lb density foam delivers 100-120 lbs flotation per quart, perfect for boat and dock stability.
- • **Superior Water Resistance:** Closed-cell structure (95-98%) ensures minimal water absorption, maintaining long-term durability.

## Overview

This 2 lb density, two-part polyurethane expanding foam kit produces 1.25 cubic feet of closed-cell foam designed for superior flotation, soundproofing, and insulation. With rapid 5-minute expansion and high water resistance, it’s engineered for marine and construction void filling, meeting US Coast Guard standards for flotation reliability.

## Description

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.2 Lb. density. Flotation range is 100-120 lbs./qt. and 480-600 lbs./gal.The 2lb 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.This foam has been tested in accordance with U.S. Coast Guard Regulation # 33 CFR 183.114 .This foam is approximately 95-98% closed cell which resists absorbing water.

Review: Does as promised
Review: 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 |
| Batteries included? | No |
| Best Sellers Rank | 234,461 in DIY & Tools ( See Top 100 in DIY & Tools ) 235 in Expanding Foams |
| Brand | Fiberglass Supply Depot |
| Color | Clear |
| Customer Reviews | 4.4 4.4 out of 5 stars (162) |
| Date First Available | 23 Dec. 2020 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Features | Water Resistant |
| Item model number | poly2lbqk |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material type | Foam,Resin |
| Number of items | 2 |
| Number of pieces | 2 |
| Package Dimensions | 26.59 x 15.49 x 8.61 cm; 907.18 g |
| Usage | Flooring, Repair, Wall Repair |

## 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

### ⭐⭐⭐⭐⭐ Review
*by J***D on 12 August 2025*

Does as promised

### ⭐⭐⭐⭐⭐ Review
*by M***E on 3 December 2025*

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

### ⭐⭐⭐⭐⭐ Review
*by X***L on 12 August 2025*

Used to fill a small cavity under concrete patio. Worked beautifully. Watched the videos to learn how it works. I even got the ratio a little wrong while measuring. Still worked well. Once the cavity was filled, I patched with concrete.

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

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-01*