---
product_id: 733261437
title: "2lb Density Expanding Cast Foam, 2-Piece Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Sound Insulation, Filling Gaps and Insulation (1 Gallon Kit)"
brand: "fiberglass supply depot"
price: "B/.573"
currency: PAB
in_stock: true
url: https://www.desertcart.com.pa/products/733261437-2lb-density-expanding-cast-foam-2-piece-polyurethane-closed-cell
store_origin: PA
region: Panama
---

# 2lb density for superior buoyancy 1 gallon kit yields 5 cubic feet foam 5 min full expansion time 2lb Density Expanding Cast Foam, 2-Piece Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Sound Insulation, Filling Gaps and Insulation (1 Gallon Kit)

**Brand:** fiberglass supply depot
**Price:** B/.573
**Availability:** ✅ In Stock

## Summary

> 🚤 Elevate your float game with foam that works as hard as you do!

## Quick Answers

- **What is this?** 2lb Density Expanding Cast Foam, 2-Piece Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Sound Insulation, Filling Gaps and Insulation (1 Gallon Kit) by fiberglass supply depot
- **How much does it cost?** B/.573 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/733261437-2lb-density-expanding-cast-foam-2-piece-polyurethane-closed-cell)

## 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

- • **Float Above the Rest:** 2lb density closed-cell foam delivers unmatched buoyancy for boats and docks.
- • **Rapid Rise, No Compromise:** Expands fully in just 5 minutes, saving you time on every project.
- • **Precision Pour, Perfect Fit:** Equal parts mix with a 45-second working window ensures flawless application.
- • **Built to Last, Ready to Coat:** Cured foam resists melting and accepts polyester, epoxy, or vinyl ester coatings.
- • **Versatile Insulation & Soundproofing:** Ideal for filling gaps, insulating, and soundproofing non-structural spaces.

## Overview

This 2lb density, 2-piece polyurethane closed-cell foam kit produces 5 cubic feet of expanding foam designed for buoyancy, insulation, and soundproofing. It cures in 5 minutes, can be coated with common resins, and is optimized for use between 75°-80°F, making it perfect for boat and dock flotation or gap filling.

## Description

2lb Density Expanding Cast Foam, 2-Piece Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Sound Insulation, Filling Gaps and Insulation (1 Gallon Kit)

## Features

- Flotation Foam is a polyurethane 2-piece foam, when mixed and pour in equal parts, this foam soundproof, insulates or provides extra lift.
- This expandable foam is recommended for empty filling in non-structural applications. It can be poured under the decks and into the gaps where a light float foam is required to provide buoyancy.
- 2# Density polyurethane buoyancy foam 1 Gallon Kit consists of 1/2 gallon Part A and 1/2 gallon Section B and produces 5 cubic feet.
- Once fully cured, this foam can be coated with any polyester, epoxy or vinyl ester resin, without melting.
- All expansion rates and times given are critical to temperature. Temperatures below 55°F reduce the expansion rate so more foam is required. The ideal operating temperature is 75° to 80°F or higher. The correct measurement of these products is very important. Working time before foaming: About 45 seconds Time before full expansion: about 5 minutes

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08RP8DNDB |
| Best Sellers Rank | #44,177 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #67 in Urethane Adhesives |
| Brand | Fiberglass Supply Depot |
| Color | Clear |
| Date First Available | December 30, 2020 |
| Full Cure Time | 5 Minutes |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1 Gallons |
| Item Weight | 10.54 pounds |
| Item model number | Poly2lbgk |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Material | Foam |
| Number of Pieces | 2 |
| Package Dimensions | 10.2 x 9.37 x 6.73 inches |
| Package Information | Can |
| Specific Uses For Product | Flooring, Repair, Wall Repair, Woodworking, Casting |
| UPC | 819794022859 |
| Unit Count | 128.0 Fluid Ounces |
| Viscosity | Medium to High |
| Viscosity Level | Medium to High |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Material:** Resin
- **Colour:** Clear
- **Item package quantity:** 1
- **Package information:** Can

## Images

![2lb Density Expanding Cast Foam, 2-Piece Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Sound Insulation, Filling Gaps and Insulation (1 Gallon Kit) - Image 1](https://m.media-amazon.com/images/I/81ib1TuKHEL.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

## 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.pa/products/733261437-2lb-density-expanding-cast-foam-2-piece-polyurethane-closed-cell](https://www.desertcart.com.pa/products/733261437-2lb-density-expanding-cast-foam-2-piece-polyurethane-closed-cell)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-02-26*