---
product_id: 733261469
title: "2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit)"
brand: "fiberglass supply depot"
price: "KD 4882.43"
currency: KWD
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.com.kw/products/733261469-2-pound-density-inflatable-pour-foam-2-part-polyurethane-closed
store_origin: KW
region: Kuwait
---

# 45 sec working time, 5 min full cure 2 lb density for optimal buoyancy 5 cubic feet foam volume per kit 2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit)

**Brand:** fiberglass supply depot
**Price:** KD 4882.43
**Availability:** ✅ In Stock

## Summary

> 🛠️ Float, Fix, and Fortify with Foam That Means Business!

## Quick Answers

- **What is this?** 2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit) by fiberglass supply depot
- **How much does it cost?** KD 4882.43 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/733261469-2-pound-density-inflatable-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 Set & Expand:** Mix and pour with a quick 45-second working window and full expansion in just 5 minutes—get the job done fast.
- • **Versatile Application:** Seamlessly laminates with polyester, epoxy, or vinyl ester resins without melting—ideal for repairs and custom builds.
- • **Precision Buoyancy Control:** 2-pound density foam delivers 470-600 lbs/gallon buoyancy—perfect for boat docks and flotation needs.
- • **USCG Compliant & Waterproof:** Tested to US Coast Guard standards for safety and durability—trusted for marine and structural use.
- • **Superior Soundproofing & Insulation:** Closed-cell structure (95-98%) blocks noise and seals air gaps, enhancing comfort and energy efficiency.

## Overview

This 2-pound density, two-part polyurethane foam kit expands to 5 cubic feet of closed-cell flotation foam, providing high buoyancy, soundproofing, and insulation. With a fast 45-second working time and compatibility with major resins, it’s engineered for marine, construction, and repair projects requiring lightweight, waterproof, and USCG-compliant foam solutions.

## Description

Flotation Foam is a polyurethane two-part foam that blends evenly and pours into place to provide soundproofing, insulation and extra buoyancy. 2 lbs. Density. Buoyancy range is 100-120 lbs/quarts. 470-600 lbs/gallon 2 lb foam is recommended for airgap filling in unstructural applications. They can be poured under the deck or in a cavity and require lightweight buoyancy foam to provide buoyancy. This foam is tested in accordance with US Coast Guard Regulations # 33 CFR 183.114. The foam is approximately 95-98% closed cell and is highly absorbent.

Review: I wanted to try this foam for setting fence posts instead of buying the stuff at the home improvement stores. Compared to the Home Improvement store post foam this foam is a little lighter weight and not as hard but still seems to do the job and it is, or was, quite a bit cheaper than the store foam. I don’t know if I would recommend it for building a deck but a residential fence would be fine. Mixing is easy enough, I got a couple silicone measuring/mixing cups and a silicone stirring sticks so I could reuse them once the foam hardened.
Review: Magnificent. I had a sewer vent inside of a wall cavity that was leaking sewer gas inside the concrete slab. Faced with $5000 of work, I instead mixed a cup of each of these and poured it into the cavity. The closed-cell foam blocks sewer gas better than concrete. It worked beautifully! The next day, I decided to fix my tippy mailbox. Instead of mixing a bunch of concrete, I poured in a half-cup of this. Job done. The only thing unclear is that you have to add B to A, not the other way around. (Or maybe it is the other way around. Read the instructions.) The only thing that's annoying is that A and B have different densities so I have to mix it by volume, not weight. I'm probably too careful with that.

## Features

- Flotation Foam is a polyurethane two-part foam that is evenly mixed and poured into place to provide soundproofing, insulation and extra buoyancy
- This expandable foam is recommended for airgap filling in unstructural applications. They can be poured under the deck or in a cavity and require lightweight buoyancy foam to provide buoyancy
- 2# density polyurethane flotation foam 1 gallon kit; 1/2 gallon part A and 1/2 gallon part B produce 5 cubic feet
- Once fully cured, you can laminate this foam with any type of polyester, epoxy, or vinyl ester resin without melting it
- All inflation rate and time is important in temperature. Temperatures below 75°F will decrease the inflation rate so more bubbles are required. The ideal operating temperature is 75 to 80 degrees Fahrenheit. It is very important to measure these products correctly. Working time before foam: about 45 seconds Fully extended time: about 5 minutes

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08RP8DNDB |
| Batteries Included | No |
| Batteries Required? | No |
| Color | clear |
| Customer Reviews | 4.5 4.5 out of 5 stars (236) |
| Date First Available | June 24, 2023 |
| Item Weight | 4.79 Kilograms |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material | Foam |
| Number Of Pieces | 2 |
| Package Dimensions | 25.91 x 23.8 x 17.09 cm; 4.79 kg |
| Part number | Poly2lbgk |
| Size | Gallon Kit |
| Special Features | High flotation range, waterproof |
| Specific Uses For Product | Flooring, Repair, Wall Repair, Woodworking, Casting |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Item Form:** Liquid
- **Material:** Foam
- **Special Feature:** High flotation range, waterproof
- **Specific Uses For Product:** Flooring, Repair, Wall Repair, Woodworking, Casting

## Images

![2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit) - Image 1](https://m.media-amazon.com/images/I/41S-u-+aQ2L.jpg)
![2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit) - Image 2](https://m.media-amazon.com/images/I/41cVcze5RmL.jpg)
![2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit) - Image 3](https://m.media-amazon.com/images/I/41sgPcwpHZL.jpg)
![2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit) - Image 4](https://m.media-amazon.com/images/I/41z05kTc6bL.jpg)
![2-Pound Density Inflatable Pour Foam 2 Part Polyurethane Closed Cell Liquid Foam Boat Dock Float Soundproofing Void Insulation (1 Gallon Kit) - Image 5](https://m.media-amazon.com/images/I/519cSzhqfkL.jpg)

## Questions & Answers

**Q: Can the Part B liquid be colored so that the expanded foam will be a color other than beige?**
A: unknown 
It can be painted.

**Q: can this be cut with hot wire ?**
A: Yes, but it is high density. It will not cut as easily as Styrofoam

**Q: Does this require moisture to cure?**
A: This will not cure with moisture present.

**Q: whats the difference between 2#,4# & 6#? is the polyurethane hydrophobic or hydrophilic?**
A: To clarify, each density of foam has a different expansion rate, so they are all used for different applications. Please refer to the reference chart of each listing for details regarding expansion.

This material is hydrophobic.

-FSD

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***D on October 20, 2025*

I wanted to try this foam for setting fence posts instead of buying the stuff at the home improvement stores. Compared to the Home Improvement store post foam this foam is a little lighter weight and not as hard but still seems to do the job and it is, or was, quite a bit cheaper than the store foam. I don’t know if I would recommend it for building a deck but a residential fence would be fine. Mixing is easy enough, I got a couple silicone measuring/mixing cups and a silicone stirring sticks so I could reuse them once the foam hardened.

### ⭐⭐⭐⭐⭐ Review
*by J***H on March 8, 2025*

Magnificent. I had a sewer vent inside of a wall cavity that was leaking sewer gas inside the concrete slab. Faced with $5000 of work, I instead mixed a cup of each of these and poured it into the cavity. The closed-cell foam blocks sewer gas better than concrete. It worked beautifully! The next day, I decided to fix my tippy mailbox. Instead of mixing a bunch of concrete, I poured in a half-cup of this. Job done. The only thing unclear is that you have to add B to A, not the other way around. (Or maybe it is the other way around. Read the instructions.) The only thing that's annoying is that A and B have different densities so I have to mix it by volume, not weight. I'm probably too careful with that.

### ⭐⭐⭐⭐⭐ Review
*by K***R on September 22, 2021*

This product is a mess to use, but I expected that. It "goes off" pretty darn quick too, but I expected that as well. Very good product. If I'm filling a large void, I just throw the whole mixing container into the void and the foam expands all around it. Puts off a huge amount of heat, so keep that in mind. After about 10-15 minutes this stuff is hard. Expands to something like 20 times the original liquid volume. Be careful not to trap the expanding foam, because this stuff will expand regardless of the size of the void it's filling. If the void is too small, the foam expands until the void blows apart. Fun for science projects if you have kids to impress.

## 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 (1 Gallon Kit)
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**Shop now:** [https://www.desertcart.com.kw/products/733261469-2-pound-density-inflatable-pour-foam-2-part-polyurethane-closed](https://www.desertcart.com.kw/products/733261469-2-pound-density-inflatable-pour-foam-2-part-polyurethane-closed)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-03-14*