---
product_id: 648503619
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: "712 Lei"
currency: RON
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.ro/products/648503619-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: RO
region: Romania
---

# 5 min full expansion time 2 lb density for optimal buoyancy USCG tested flotation foam 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:** 712 Lei
**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?** 712 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/648503619-2-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

- • **Certified Safety:** Meets US Coast Guard flotation standards for peace of mind
- • **Rapid 5-Minute Cure:** Fast-setting foam to keep your projects on schedule
- • **Precision 2-Part Mix:** Equal parts A & B for flawless expansion every time
- • **Versatile Application:** Perfect for soundproofing, insulation, and boat flotation
- • **Lightweight Yet Durable:** 2 lb density closed-cell foam resists water absorption

## Overview

This 2 lb density, 2-part polyurethane expanding foam kit delivers 1.25 cubic feet of closed-cell foam designed for superior buoyancy, soundproofing, and insulation. Tested to US Coast Guard standards, it cures in 5 minutes and can be laminated with common resins, making it the go-to solution for professional-grade void filling and flotation needs.

## 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

- 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 |
| Batteries Required? | No |
| Best Sellers Rank | #19,882 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Expanding Foams |
| Color | Clear |
| Customer Reviews | 4.4 4.4 out of 5 stars (162) |
| Date First Available | 1 May 2024 |
| Item model number | poly2lbqk |
| Material Type(s) | Foam,Resin |
| Number of Puzzle Pieces | 2 |
| Package Dimensions | 26.59 x 15.49 x 8.61 cm; 907.18 g |

## Product Details

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

## 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.ro/products/648503619-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed](https://www.desertcart.ro/products/648503619-2-lb-density-expanding-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-01-30*