---
product_id: 696011322
title: "6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit)"
brand: "fiberglass supply depot"
price: "S/.609"
currency: PEN
in_stock: true
reviews_count: 5
category: "Fiberglass Supply Depot"
url: https://www.desertcart.pe/products/696011322-6-lb-density-expanding-pour-foam-2-part-polyurethane-closed
store_origin: PE
region: Peru
---

# Laminatable with polyester, epoxy, vinyl ester 5 min full cure time 6 lb density for superior buoyancy 6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit)

**Brand:** fiberglass supply depot
**Price:** S/.609
**Availability:** ✅ In Stock

## Summary

> 🛠️ Elevate your DIY game with foam that floats, fills, and finishes flawlessly!

## Quick Answers

- **What is this?** 6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit) by fiberglass supply depot
- **How much does it cost?** S/.609 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/696011322-6-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

- • **Speedy Setup:** Fully cures in just 5 minutes, so your projects move from pour to perform in no time.
- • **Craft Without Limits:** Compatible with polyester, epoxy, and vinyl ester resins—perfect for sculpting, carving, and casting.
- • **Float Above the Rest:** 6 lb density closed-cell foam delivers unmatched buoyancy for boats, docks, and decoys.
- • **Soundproof & Insulate Like a Pro:** Seamlessly fills voids while providing top-tier sound dampening and thermal insulation.
- • **Precision Mixing, Perfect Results:** Two-part formula with a 45-second working time ensures flawless expansion and finish every time.

## Overview

This 6 lb density, two-part polyurethane expanding foam kit produces 0.375 cubic feet of closed-cell foam that cures in 5 minutes. Designed for flotation, soundproofing, insulation, and sculpting, it laminates easily with polyester, epoxy, or vinyl ester resins without melting. Ideal for professional-grade projects requiring fast curing and durable, buoyant foam.

## Description

Product Description

Review: Excellent Closed Cell Foam for Small Projects - This worked well to fill a small void in a fiberglass boat step project I was working on. I am not sure how waterproof it would have been because I encapsulated it with epoxy before covering it with glass and Coosa board. One thing I had trouble with was figuring out how much to mix for the size of void. That information was provided but I way over estimated how much was needed. It was easy enough to cut off the excess with a hack saw. The image attached is "after" I made the adjustment to closer to the right amount. Making that calculation easier for smaller quantities would be nice. Along those lines, markers on the bottles for smaller batches would be very helpful. Nice product though.
Review: Very good - just what I needed - This saved me having to rip out and re-mortar a tub. First time mortar bed for fiberglass acrylic tub and the mortar shrank leaving voids. This fills the voids perfectly, it’s incredibly solid now. In case you’re wondering as I was, this will go through a tube to get it exactly where you need it. I was afraid it’d expand in tube before exiting. I had it mixed and poured in funnel though within 20sec. Void and tube in vid both 5/8 in.

## Features

- Causes serious eye irritation.
- Causes skin irritation.
- Harmful if inhaled.
- May cause allergy or asthma symptoms or breathing difficulties if inhaled.
- May cause an allergic skin reaction.
- May cause damage to organs (respiratory tract) through prolonged or repeated exposure (if inhaled).
- May cause respiratory irritation.
- 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.
- 6LB. Density polyurethane flotation Foam 1 Quart Kit; Consists of 1 Pint of Part A and 1 Pint of Part B and produces 0.375 cubic feet.
- Once fully cured this foam can be laminated over with any type of polyester, epoxy or vinyl ester resin without melting.
- The 6LB density also works well in floating decoy or taxidermy applications as well as many other sculpting, casting, carving and other filling applications
- 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 | B0BLKLDH79 |
| Best Sellers Rank | 191,759 in DIY & Tools ( See Top 100 in DIY & Tools ) 209 in Expanding Foams |
| Brand | Fiberglass Supply Depot |
| Colour | Clear/Transparent |
| Compatible Material | Foam |
| Container Type | Can |
| Customer Reviews | 4.4 out of 5 stars 55 Reviews |
| Full Cure Time | 5 Minutes |
| Global Trade Identification Number | 00819794023276 |
| Included Components | 6lb poly foam |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Volume | 1 Quarts |
| Item form | Liquid |
| Manufacturer | Fiberglass Supply Depot Inc. |
| Manufacturer Part Number | Poly6lbgk |
| Material | Resin |
| Model Number | 00819794023276 |
| Other Special Features of the Product | Laminatable without melting |
| Special feature | Laminatable without melting |
| Specific Uses For Product | Flotation, Soundproofing, Insulation, Filling Voids, Carving, Sculpting, Casting, Floating Decoy or Taxidermy |
| Specific uses for product | Flotation, Soundproofing, Insulation, Filling Voids, Carving, Sculpting, Casting, Floating Decoy or Taxidermy Specific uses for product Flotation, Soundproofing, Insulation, Filling Voids, Carving, Sculpting, Casting, Floating Decoy or Taxidermy See more |
| Unit Count | 1.0 count |
| Viscosity Level | Low |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** Fiberglass Supply Depot
- **Item form:** Liquid
- **Material:** Resin
- **Special feature:** Laminatable without melting

## Images

![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit) - Image 1](https://m.media-amazon.com/images/I/71D4G+ANFgL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit) - Image 2](https://m.media-amazon.com/images/I/61Xg7wuqwHL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit) - Image 3](https://m.media-amazon.com/images/I/81s3RjkkMiL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit) - Image 4](https://m.media-amazon.com/images/I/71Gbm9XW+IL.jpg)
![6 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit) - Image 5](https://m.media-amazon.com/images/I/71fqAimxMaL.jpg)

## Questions & Answers

**Q: Can you press dents into this with your fingers once it’s fully cured?**
A: If you pour too much, too fast, you can create less dense regions that you can press your finger into. If you are patient with your pour it's pretty dang rigid - with that being said, if you put a tremendous weight through your thumb, you can still dent it a bit, but it's not easy to deform (I'm a 180 lbs male of average strength).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Closed Cell Foam for Small Projects
*by H***E on 23 December 2025*

This worked well to fill a small void in a fiberglass boat step project I was working on. I am not sure how waterproof it would have been because I encapsulated it with epoxy before covering it with glass and Coosa board. One thing I had trouble with was figuring out how much to mix for the size of void. That information was provided but I way over estimated how much was needed. It was easy enough to cut off the excess with a hack saw. The image attached is "after" I made the adjustment to closer to the right amount. Making that calculation easier for smaller quantities would be nice. Along those lines, markers on the bottles for smaller batches would be very helpful. Nice product though.

### ⭐⭐⭐⭐⭐ Very good - just what I needed
*by B***8 on 17 July 2024*

This saved me having to rip out and re-mortar a tub. First time mortar bed for fiberglass acrylic tub and the mortar shrank leaving voids. This fills the voids perfectly, it’s incredibly solid now. In case you’re wondering as I was, this will go through a tube to get it exactly where you need it. I was afraid it’d expand in tube before exiting. I had it mixed and poured in funnel though within 20sec. Void and tube in vid both 5/8 in.

### ⭐⭐⭐⭐⭐ 6lb foam
*by T***Y on 20 February 2024*

As described. Easy to mix, drys quickly.

## Frequently Bought Together

- Fiberglass Supply Depot 6LB Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boats, Dock Flotation, Carving, Soundproofing, Filling Voids, and Insulation (Quart Kit)
- 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 Peru*
*Store origin: PE*
*Last updated: 2026-05-30*