---
product_id: 265890389
title: "Fiberglass Supply Depot 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: "€ 88.52"
currency: EUR
in_stock: true
reviews_count: 9
category: "Fiberglass Supply Depot"
url: https://www.desertcart.de/products/265890389-fiberglass-supply-depot-2-lb-density-expanding-pour-foam-2
store_origin: DE
region: Germany
---

# 2-part polyurethane for precise mixing 5 min full cure time 2 lb density for superior buoyancy Fiberglass Supply Depot 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:** € 88.52
**Availability:** ✅ In Stock

## Summary

> 🛠️ Expand your potential with foam that works as hard as you do!

## Quick Answers

- **What is this?** Fiberglass Supply Depot 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?** € 88.52 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/265890389-fiberglass-supply-depot-2-lb-density-expanding-pour-foam-2)

## 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

- • **Speedy Setup:** Fully cures in just 5 minutes—get your project moving faster without waiting around.
- • **Weather Warrior:** Water-resistant and compatible with polyester, epoxy, or vinyl ester resins for durable, long-lasting finishes.
- • **Float Above the Rest:** 2 lb density closed-cell foam delivers unmatched buoyancy for boats and docks.
- • **Precision Performance:** Two-part polyurethane formula ensures consistent expansion and reliable results every time.
- • **Versatile Application:** Perfect for soundproofing, insulation, void filling, and structural flotation—one kit, endless solutions.

## Overview

Fiberglass Supply Depot’s 2 lb density expanding pour foam is a fast-curing, two-part polyurethane closed-cell liquid foam designed for superior buoyancy, soundproofing, insulation, and void filling. This quart kit produces 1.25 cubic feet of water-resistant foam that cures in 5 minutes and can be laminated with various resins, making it the go-to solution for professional-grade marine and construction projects.

## Description

Fiberglass Supply Depot 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): desertcart.com: Industrial & Scientific

Review: Works as advertised - Mixes easily, expands nicely, and cures quickly. More than meet expectations, good product
Review: Worked beautifully - 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.

## 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 |
| Best Sellers Rank | #25,741 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #52 in Urethane Adhesives |
| Brand Name | Fiberglass Supply Depot |
| Color | Clear |
| Compatible Material | Fiberglass |
| Container Type | Can |
| Customer Reviews | 4.4 4.4 out of 5 stars (169) |
| Full Cure Time | 5 Minutes |
| Global Trade Identification Number | 00819794022873 |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Weight | 2 Pounds |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material Type | Resin |
| Model | poly2lbqk |
| Other Special Features of the Product | Water Resistant |
| UPC | 819794022873 |
| Unit Count | 32 Fluid Ounces |
| Viscosity | medium |
| Volume | 1 Quarts |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Color:** Clear
- **Item Form:** Liquid
- **Material:** Resin
- **Special Feature:** Water Resistant

## Images

![Fiberglass Supply Depot 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

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

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

### ⭐⭐⭐⭐⭐ Worked beautifully
*by X***L on August 12, 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.

### ⭐⭐⭐⭐⭐ Good product
*by E***S on October 2, 2025*

Good deal

## 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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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-04-22*