--- product_id: 326159295 title: "0846DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz, Gray" brand: "red devil" price: "283.64 DT" currency: TND in_stock: true reviews_count: 5 url: https://www.desertcart.tn/products/326159295-0846dx-f-seal-181-fiber-reinforced-water-based-duct-sealant store_origin: TN region: Tunisia --- # Fast-drying & low VOC formula Fiber-reinforced for leak-free HVAC UL 181 A-M & B-M certified 0846DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz, Gray **Brand:** red devil **Price:** 283.64 DT **Availability:** βœ… In Stock ## Summary > πŸ”§ Seal smart, save energy, and never sweat the leaks again! ## Quick Answers - **What is this?** 0846DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz, Gray by red devil - **How much does it cost?** 283.64 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/326159295-0846dx-f-seal-181-fiber-reinforced-water-based-duct-sealant) ## 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 - β€’ **Seal Like a Pro:** Fiber-reinforced formula guarantees airtight HVAC systems, boosting energy efficiency and comfort. - β€’ **Certified Confidence:** UL 181 A-M & B-M certification means trusted performance on metal, fiberglass, and flexible ducts. - β€’ **Fast & Safe Application:** Quick drying with low VOCs ensures a safer, faster job in any environment. - β€’ **Industry-Leading Standards:** Exceeds SMACNA pressure and sealing classes for professional-grade results every time. - β€’ **Built to Brave the Elements:** Weather-resistant for reliable indoor and outdoor sealing, no matter the climate. ## Overview Red Devil 0846DX F-Seal 181 is a premium fiber-reinforced, water-based duct sealant designed for superior leak-proof sealing of HVAC systems. UL 181 A-M & B-M certified, it works seamlessly on metal, fiberglass, and flexible ducts, offering durable indoor/outdoor protection with fast drying and low VOCs. Trusted by professionals to exceed industry standards, it’s the go-to solution for energy-efficient, long-lasting HVAC performance. ## Description Red 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 : Red is still a privately-owned family business with state-of-the-art manufacturing facilities in Pryor, Oklahoma. Click on the Red link at the top of this page to visit our Brand Store. Review: Works great - I sealed my ducts in the basement and now my basement is not that cold anymore in the summer when my A/C is running. Now I know how much money I had wasted for the last 10 years :-). Now my upstair has more air flow and cooler. Review: Good for all around applications - I bought this to fill a small ducting leak in my a/c but also applied it to my house when doing stucco repairs on holes left behind by the last sprinkler timer on the outside of my house. It dried perfectly and painted over very well. I docked it a star because I noticed the canister developed a leak while dispensing the contents on the first use. I wasn't using much pressure with the caulk gun so not sure why it happened so easily. However, it did seal itself so I can continue using it. The packaging needs some improvement, though. ## 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 | |---------------|-------| | ASIN | B01I7JVUR2 | | Best Sellers Rank | #135,665 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #200 in Heating & Cooling Ducting Products | | Brand | Red Devil | | Brand Name | Red Devil | | Color | Gray | | Compatible Material | Fiberglass, Metal | | Customer Reviews | 4.4 out of 5 stars 1,256 Reviews | | Global Trade Identification Number | 00075339003480 | | Included Components | Duct Sealant | | Item Dimensions | 5.1 x 5.1 x 28.6 centimeters | | Item Form | Liquid | | Item Type Name | Water Based Duct Sealant | | Item Weight | 1.05 Pounds | | Item dimensions L x W x H | 5.1 x 5.1 x 28.6 centimeters | | Item weight | 1.05 Pounds | | Manufacturer | Red Devil | | Material | White | | Material Type | White | | Model | 0846DX | | Number of Items | 1 | | Part Number | 0846DX | | Style | F Seal | | Style Name | F Seal | | Surface Recommendation | Metal | | UPC | 075339003480 | | Unit Count | 1 Count | | Water Resistance Level | Water Resistant | | Water resistance level | Water Resistant | ## Product Details - **Brand:** Red Devil - **Item dimensions L x W x H:** 5.1 x 5.1 x 28.6 centimeters - **Item weight:** 476 g - **Material:** White - **Style:** F Seal ## Images ![0846DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 10.1 oz, Gray - Image 1](https://m.media-amazon.com/images/I/51GL4IS8GML.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐ Works great *by H***. on 26 July 2020* I sealed my ducts in the basement and now my basement is not that cold anymore in the summer when my A/C is running. Now I know how much money I had wasted for the last 10 years :-). Now my upstair has more air flow and cooler. ### ⭐⭐⭐⭐ Good for all around applications *by S***G on 2 October 2020* I bought this to fill a small ducting leak in my a/c but also applied it to my house when doing stucco repairs on holes left behind by the last sprinkler timer on the outside of my house. It dried perfectly and painted over very well. I docked it a star because I noticed the canister developed a leak while dispensing the contents on the first use. I wasn't using much pressure with the caulk gun so not sure why it happened so easily. However, it did seal itself so I can continue using it. The packaging needs some improvement, though. ### ⭐⭐⭐⭐⭐ great buy *by J***T on 11 March 2025* great buy great buy great buy --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/326159295-0846dx-f-seal-181-fiber-reinforced-water-based-duct-sealant](https://www.desertcart.tn/products/326159295-0846dx-f-seal-181-fiber-reinforced-water-based-duct-sealant) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-11-07*