Red Devil 0841DX F-Seal 181 Duct Seal, Fiber Reinforced Water Based Duct Sealant, 1 Gallon, Gray, Made in USA

Red Devil 0841DX F-Seal 181 Duct Seal, Fiber Reinforced Water Based Duct Sealant, 1 Gallon, Gray, Made in USA

Q: Is the "F" in the bucket like a liquid (brushable) or more like a paste?

It's not quite like a paste but it's not liquidity either and doesn't drip so you can put it on thick. I love this stuff, not much of a odor as well. I used a cheap chip brush to spread it.

Q: I'm redoing all the flex ductwork (insulated kind) in a crawl space. should i use the d our f sealant ?

You could use either one. Both are perfect for what you are doing, but I would use the F-Seal because it has fibers in it.

Q: Is this safe to use and will it work on gas dryer duct work joints (inside the fittings and outside)?

Sorry, this should not be used on a dryer. It is for HVAC only. Thanks.

4.4/5

Product ID: 523290274

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Details

Material
Water Based
Brand
Red Devil
Item weight
5.67 kg
Item dimensions L x W x H
17.8 x 17.8 x
Compatible material
Plastic Metal

⏱️Fast-drying, low VOC formula

🌡️UL 181 A-M & B-M certified versatility

🛠️Fiber-reinforced for leak-proof HVAC

Frequently Bought Together

Red Devil 0841DX F-Seal 181 Fiber Reinforced Water Based Duct Sealant, 1 Gallon, Gray, Made in USA

Pro Grade - Chip Paint Brushes - 12 Ea 2 Inch Chip Paint Brush Light Brown

Description

🔥 Seal the deal with Red Devil – where performance meets precision!

CERTIFIED VERSATILITY - UL 181 A-M & B-M approval means seamless use on metal, fiberglass, and flexible ducts—one sealant for all jobs.
WEATHERPROOF DURABILITY - Engineered to endure indoor and outdoor conditions, ensuring long-lasting protection against leaks and wear.
QUICK SAFE APPLICATION - Fast-drying with low VOCs, perfect for busy pros who prioritize health and speed on every project.
UNMATCHED HVAC EFFICIENCY - Fiber-reinforced sealant guarantees airtight ducts, slashing energy waste and boosting system performance.
INDUSTRY LEADING STANDARDS - Exceeds SMACNA Pressure and Sealing Classes, delivering professional-grade reliability you can trust.

The Red Devil 0841DX F-Seal 181 is a fiber-reinforced, water-based duct sealant designed for superior leak prevention in HVAC systems. UL 181 A-M & B-M certified, it works on all duct types and withstands indoor/outdoor conditions. Fast-drying and low VOC, it surpasses SMACNA standards, making it the go-to choice for professionals seeking durable, efficient sealing solutions.

Specifications

Manufacturer	Red Devil
Part Number	0841DX
Product Dimensions	17.78 x 17.78 x 20.32 cm; 5.67 kg
Item model number	0841DX
Size	1 Gallon
Colour	Gray,Red
Style	F Seal
Material	Water Based
Item Package Quantity	1
Included Components	F Seal 181 Water Based Duct Sealant
Batteries Required?	No
Item Weight	5.67 kg

Have a Question? See What Others Asked

Is the "F" in the bucket like a liquid (brushable) or more like a paste?

I'm redoing all the flex ductwork (insulated kind) in a crawl space. should i use the d our f sealant ?

Is this safe to use and will it work on gas dryer duct work joints (inside the fittings and outside)?

How long do I need to wait before turning on the A/C after application?

Common Questions

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