---
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: "R$830"
currency: BRL
in_stock: true
reviews_count: 9
category: "Fiberglass Supply Depot"
url: https://www.desertcart.com.br/products/265890389-fiberglass-supply-depot-2-lb-density-expanding-pour-foam-2
store_origin: BR
region: Brazil
---

# 5 min full cure time 2 lb density for optimal buoyancy Ideal working temp 75-80°F 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:** R$830
**Availability:** ✅ In Stock

## Summary

> 🚀 Expand Your Projects, Not Your Wait Time!

## 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?** R$830 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/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

- • **Rapid 5-Minute Cure:** Get projects done fast with a quick full expansion and curing time that keeps your workflow seamless.
- • **Resin-Compatible Finish:** Fully cured foam can be laminated with polyester, epoxy, or vinyl ester resins without damage.
- • **Versatile Multi-Use Solution:** Soundproof, insulate, fill voids, or add flotation—one kit, endless professional applications.
- • **Precision-Engineered Buoyancy:** 2 lb density closed-cell foam delivers reliable flotation and void filling without added weight.
- • **Temperature-Tuned Performance:** Optimized for 75-80°F to ensure perfect expansion and consistent results every time.

## Overview

Fiberglass Supply Depot’s 2 lb density expanding pour foam is a two-part polyurethane closed-cell liquid foam designed for professional-grade flotation, soundproofing, insulation, and void filling. This quart kit mixes easily, cures in 5 minutes, and performs best at 75-80°F, producing 1.25 cubic feet of water-resistant foam that can be laminated with common resins for durable, lightweight solutions.

## 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 | #53,262 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #77 in Urethane Adhesives |
| Brand | Fiberglass Supply Depot |
| Color | Clear |
| Date First Available | December 23, 2020 |
| Full Cure Time | 5 Minutes |
| Global Trade Identification Number | 00819794022873 |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1 Quarts |
| Item Weight | 2 pounds |
| Item model number | poly2lbqk |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material | Resin |
| Number of Pieces | 2 |
| Package Dimensions | 10.47 x 6.1 x 3.39 inches |
| Package Information | Can |
| Special Feature | Water Resistant |
| UPC | 819794022873 |
| Unit Count | 32 Fluid Ounces |
| Viscosity | medium |
| Viscosity Level | Medium |
| 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 stuff but lacking labelling.
*by T***N on March 29, 2025*

It works well but it requires labelling. I found out that the dark stuff is the Isocyanate and the light stuff is the Polyol. And if you want to use a scale to measure by weight, the mix ratio is 100:88, Isocyanate:Polyol. The Isocyanate weighs more than the Polyol. Be sure to mix it with a drill so that you have maximum time to work with it before it starts foaming. It starts to foam about 40ish seconds after you start mixing (in an air temp of 65 degrees F) so you don't really have a lot of time to get it where you want it. Not a problem if you are pouring it, but if you are painting it on something you have to mix it in small batches to account for this. It seems like it takes about 20 minutes to fully expand and dry. If mixed in the proper ratio, the final product is very brittle and rigid, and somewhat fragile. If you add more Polyol, you can make it a bit more flexible and way more durable. I have mixed it up to a ratio of 100:130 by weight (Iso:Poly) and it still expands and dries more or less the same; meaning final product is not sticky and uncured and still takes the same amount of time to dry and expand. For me the best ratio to make it pretty flexible and extremely durable was 100:110 Iso:poly. Yes this means you will have some Iso left over but thats just a small consequence for hacking the system.

## 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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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-01*