---
product_id: 31835677
title: "Red Devil 0846DX F Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz., Gray, 1 Pack"
brand: "red devil"
price: "€ 19.47"
currency: EUR
in_stock: true
reviews_count: 6
url: https://www.desertcart.pt/products/31835677-red-devil-0846dx-f-seal-181-fiber-reinforced-water-based
store_origin: PT
region: Portugal
---

# Fiber-reinforced for leak-free HVAC Weather-resistant indoor/outdoor durability UL 181 A-M & B-M certified Red Devil 0846DX F Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz., Gray, 1 Pack

**Brand:** red devil
**Price:** € 19.47
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal smarter, save energy, and stay ahead of the curve!

## Quick Answers

- **What is this?** Red Devil 0846DX F Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz., Gray, 1 Pack by red devil
- **How much does it cost?** € 19.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/31835677-red-devil-0846dx-f-seal-181-fiber-reinforced-water-based)

## Best For

- red devil enthusiasts

## Why This Product

- Trusted red devil brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seal Like a Pro:** Fiber-reinforced formula guarantees airtight HVAC performance, slashing energy waste.
- • **Certified Confidence:** UL 181 A-M & B-M certification means trusted compatibility with all duct types.
- • **Built for All Seasons:** Weather-resistant durability ensures your seal stands strong indoors and out.
- • **Fast & Safe Application:** Low VOC and quick-dry formula lets you work smarter, not harder, in sensitive environments.
- • **Industry-Leading Standards:** Exceeds SMACNA pressure and sealing classes for unmatched reliability.

## Overview

Red Devil 0846DX F Seal 181 is a 10.1 oz. fiber-reinforced, water-based duct sealant designed for superior leak-proof sealing of HVAC systems. UL 181 A-M & B-M certified, it works on metal, fiberglass, and flexible ducts with weather-resistant durability for indoor and outdoor use. Fast-drying and low VOC, it surpasses industry standards to boost energy efficiency and system performance.

## Description

Red Devil F-Seal 181 is a specially formulated fiber reinforced water based duct sealant/mastic for indoor/outdoor use. Suitable for pressure sealing all types of HVAC duct systems including metal, fiberglass ductboard and flexduct. Made in USA. FEATURES: LEED EQ 4.1 Compliant Indoor/Outdoor Excellent Adhesion Excellent Flexibility Low VOC USE ON: Metal and Flexible Ducts Vents Air Conditioners HVAC Appliances SPECIFICATIONS: UL 181 A-M & B-M certified and can be used on all types of HVAC ductwork. ABOUT RED DEVIL: Red Devil is still a privately-owned family business with state-of-the-art manufacturing facilities in Pryor, Oklahoma. Click on the Red Devil link at the top of this page to visit our Brand Store.

## Features

- SUPERIOR SEALING: Fiber-reinforced formula ensures leak-free HVAC systems, improving energy efficiency and performance
- VERSATILE APPLICATION: UL 181 A-M & B-M certified for use on all types of HVAC ductwork, including metal, fiberglass, and flexible ducts
- INDOOR/OUTDOOR DURABILITY: Weather-resistant sealant withstands various conditions, making it ideal for both interior and exterior use
- FAST-DRYING & LOW VOC: Quick application and reduced drying time, with low volatile organic compounds for safer use in sensitive environments
- EXCEEDS INDUSTRY STANDARDS: Surpasses all SMACNA Pressure and Sealing Classes, ensuring top-quality performance for your HVAC systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Acrylic |
| Brand | Red Devil |
| Style | 1 - Pack |
| Item Weight | 1.1 Pounds |
| Item dimensions L x W x H | 2 x 2 x 11.25 inches |
| Water Resistance Level | Water Resistant |
| Item Form | Liquid |
| UPC | 075339003480 |
| Unit Count | 1.0 Count |
| Global Trade Identification Number | 00075339003480 |
| Number of Items | 1 |
| Color | Gray |
| Surface Recommendation | Metal |
| Manufacturer | Red Devil |
| Part Number | 0846DX |
| Item Weight | 1.05 pounds |
| Product Dimensions | 2 x 2 x 11.25 inches |
| Item model number | 0846DX |
| Is Discontinued By Manufacturer | No |
| Size | 10.1 Oz |
| Finish | Brushed |
| Pattern | Solid |
| Shape | Rectangular |
| Power Source | Hand_powered |
| Item Package Quantity | 1 |
| Included Components | Duct Sealant |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Acrylic
- **Brand:** Red Devil
- **Style:** 1 - Pack
- **Item Weight:** 1.1 Pounds
- **Item dimensions L x W x H:** 2 x 2 x 11.25 inches

## Images

![Red Devil 0846DX F Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz., Gray, 1 Pack - Image 1](https://m.media-amazon.com/images/I/51GL4IS8GML.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Applies easily
  

*by A***. on Reviewed in the United States on October 8, 2021*

This applies like any other caulk you're familiar with. It holds well and sets very well.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Dries fast/dull med gray color
  

*by J***7 on Reviewed in the United States on August 18, 2023*

I used this to seal my mobile home vents after applying duct vent tape to seal them up. For my personal project, I wish I would have gotten the bucket instead of the caulking dispenser tube as I needed more and it would have been easier to work with. This tube lasted for eight vents but I may slather more on when I get another tube tube for my last three vents since I’ll have extra to get rid of.The color is a dull gray and when I got it on my hands as few times, I definitely had to scrub under water with soap to get it off. It scraped off the floor and other surfaces easily like a rubber glue which was nice. I will try and update after we turn the heat on this winter to tell how it’s holding up.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Seals well, easy to use
  

*by P***Z on Reviewed in the United States on June 26, 2022*

Seals well, easy to use, 5 stars from me

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**Shop now:** [https://www.desertcart.pt/products/31835677-red-devil-0846dx-f-seal-181-fiber-reinforced-water-based](https://www.desertcart.pt/products/31835677-red-devil-0846dx-f-seal-181-fiber-reinforced-water-based)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-01-23*