---
product_id: 1513190
title: "INS541LD Fiber Insul 40FT Cocoon LW DUS"
brand: "u.s. greenfiber llc"
price: "€ 158.25"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.pt/products/1513190-ins541ld-fiber-insul-40ft-cocoon-lw-dus
store_origin: PT
region: Portugal
---

# 40 SQFT coverage Eco-friendly cellulose Lightweight 18.8 lbs INS541LD Fiber Insul 40FT Cocoon LW DUS

**Brand:** u.s. greenfiber llc
**Price:** € 158.25
**Availability:** ❌ Out of Stock

## Summary

> ♻️ Insulate smarter, live greener — don’t get left in the cold!

## Quick Answers

- **What is this?** INS541LD Fiber Insul 40FT Cocoon LW DUS by u.s. greenfiber llc
- **How much does it cost?** € 158.25 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/1513190-ins541ld-fiber-insul-40ft-cocoon-lw-dus)

## Best For

- u.s. greenfiber llc enthusiasts

## Why This Product

- Trusted u.s. greenfiber llc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sustainably Smart:** Made from eco-friendly cellulose, reducing your carbon footprint.
- • **Light as a Feather:** At just 18.8 pounds, easy to handle and install without strain.
- • **No Batteries, No Fuss:** Completely passive insulation—no power needed, just pure performance.
- • **Trusted Brand Reliability:** Manufactured by U.S. Greenfiber, a leader in green building materials.
- • **Maximize Your Space Efficiency:** Covers a generous 40 square feet for comprehensive insulation.

## Overview

The INS541LD Fiber Insul 40FT Cocoon LW DUS by U.S. Greenfiber LLC is a lightweight, eco-friendly cellulose insulation product covering 40 square feet. Designed for easy installation without batteries or power, it offers sustainable thermal protection backed by a trusted manufacturer.

## Description

Great for DIY or smaller contractor use, this bag is easy to carry and ideal for rental or small-sized machines. The economical blended formula is ideal for any dry blow-in applications like attics and can also be dry blown into walls and Great for DIY or smaller contractor use, this bag is easy to carry and ideal for rental or small-sized machines. The economical blended formula is ideal for any dry blow-in applications like attics and can also be dry blown into walls and floors. The blend is specially treated for harsh climates.. The blend is specially treated for harsh climates.

## Features

- U S Greenfiber #INS5510LD 40SQFT Cell Insulation
- U.S. GREENFIBER LLC

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | U.S. GREENFIBER LLC |
| Part Number | INS550LD |
| Item Weight | 18.81 pounds |
| Product Dimensions | 22 x 15 x 13 inches |
| Item model number | INS541LD |
| Item Package Quantity | 1 |
| Batteries Required? | No |

## Images

![INS541LD Fiber Insul 40FT Cocoon LW DUS - Image 1](https://m.media-amazon.com/images/I/41Huwdkl2DL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ U.S. Greenfiber Llc 40Sqft Cell Insulation Ins541ld Cellulose Insulation
*by R***S on July 28, 2013*

The product arrived just in time!I don't know if I'm entitled to rate this product, as I'm not using it for the purpose it was made. I use it to make paper clay and it's amazing!

### ⭐⭐⭐⭐⭐ Five Stars
*by J***M on February 14, 2017*

Nice

### ⭐⭐ Just use the fiberglass.
*by G***R on June 2, 2012*

I had a customer demand cellulose, I really wasn't that picky until I had to install it. If you have a real machine and not the DIY free one at the box stores or any 110v plug in machine(wimp machines), it fills the attic so full of dust you can't see what you are doing. Hard to get a constistant fill when you can't see even after I readjusted the blower. Here we have ducts in our attics....TX....stupid I know but hey, we retrofit we are not builders. Anyway, I always cover the duct system or any bridging such as "rat runs" "hogs troughs" "stiffbacks" whatever the term used where you are can be 2x8+2x8 which is 14.5" or beams that can be 16" or greater, or like I said duct systems. Good luck covering any of that with cellulose or keeping it covered once the stuff settles way down like it wants to do. I have now been in hundreds of attics and I can tell you the choices and what holds up the longest.....#1 best for very old installs, batts, but they are expensive, inconsistant, still itchy as hell, and just a pain to install so nobody uses them for ceilings anymore even though 50 years old they will still look fine. #2 Mineral wool or Loose fill fiberglass, it is glass so it doesn't age from the UV radiation or dissappear/settle bad because it is a glass fiber, another nice thing is retrofit you can easily find any air leaks because it is white or pink (not including the mineral wools) so you don't even really need the blower door to find the big air leaks. Most of the really old stuff down here gets trampled at some point because of rodents and the one lazy homeowner that didn't keep them out(except batts they actually seem to bounce back) Fiberglass increases it's R/inch when compressed, cellulose loses it. Yes you lose a bit of your overall Rvalue with the glass, but you gain R/inch so you don't lose much with fiberglass and the greater the lbs/ft3 of fiberglass the more airflow it retards. #3 Cellulose, for some reason it seems to either settle really bad or just dissappear. Don't know why, but there has only been one cellulose attic that I have seen where I thought "wow, that is holding up well over time" but it was only 12 years old. Cellulose when added as a retrofit really shouldn't be installed over fiberglass, but you can always install fiberglass over any other insulation so cellulose is not quite as versatile. Plus I can't seem to ever get as good as price for cellulose/Rvalue as I can with fiberglass, maybe that is just me, but it would have to be substantially cheaper to make it worth the extra headaches of trying to install it. When you have a paper mask even when it is cold down here, not only can you not see what you are doing, it plugs the mask in no time, I really don't trust boric acid which is like 30% of what you get when you buy cellulose, but I don't want it all over my mask, and I want to see what I am doing to get a nice even coverage. Cellulose will also plug the eaves and make it harder to keep a good airflow in the attic, it will also tend to plug the soffit vents, fiberglass is so light that when you blow towards the eaves the stack effect of the roof or wind seems to keep all of that clear enough (either way make sure you have baffles just in case). People that take it seriously one way or the other need to give up. I prefer fiberglass but like I said I am not going to tell a customer no over the issue. I give it two stars because it's not that bad, but still if you are going to choose one, choose fiberglass and for god sakes stay away from the spray foam, everybody knows your roof will leak at some point and I hate showing up with my thermal camera to try and locate the leak for the poor owners heating and cooling their attic. Fiberglass will bury your thermal bridging or duct system better, last longer, allow better ventilation at the eaves, let you find your air leaks later if you decided not to seal them before you insulated, is much easier these days to work around believe it or not they make it differently now so it is actually less itchy and nasty than cellulose honestly I can blow it in all day and get home forgetting I was even around it, good luck doing that with cellulose with finds its way into ever exposed part of your body. You will end up with much more plastic trash if you use cellulose bags vs. fiberglass you get way more product/bag with the glass, and it's glass, what do you think will last longer, wood fiber or glass fiber? Both are bad to breathe, but fiberglass won't become airborne near as easily it seems to land on the attic floor and stay there. Trust me, the 1# choice for attic insulation is glass and they will change with demand like they have before. Almost every business or product with "green" in the name is a sham, this is no different. Glass has recycled content too, and if they dont it comes from sand, not trees.Also Building Performance AnalystDeeper is better and glass lasts longer.

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-19*