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.

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.

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.

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

Hi, you should wait 24 hours. Thanks....

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Red Devil F Seal 181 Water Based Duct Sealant

Product ID: 41959850

Details

Brand
Red Devil
Item Weight
16 ounces
Item dimensions L x W x H
7 x 7 x 8
Material
Acrylic
Style
1 - Pack

⚡Fast-drying, low VOC formula

🌦️Weather-resistant for indoor/outdoor use

🛠️UL 181 A-M & B-M certified

R2174

Duties & taxes included

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

FAST SAFE APPLICATION - Low VOC and quick drying means less downtime and healthier indoor air quality.
LEAK PROOF HVAC MASTERY - Fiber-reinforced formula guarantees airtight, energy-saving duct seals.
BUILT TO BRAVE THE ELEMENTS - Weather-resistant durability keeps your system sealed rain or shine.
INDUSTRY LEADING PERFORMANCE - Exceeds SMACNA standards for pressure and sealing—trusted by pros nationwide.
UNIVERSAL HVAC COMPATIBILITY - Certified for metal, fiberglass, and flexible ducts—one sealant to rule them all.

Red Devil 0841DX F-Seal 181 is a premium, fiber-reinforced, water-based duct sealant made in the USA. UL 181 A-M & B-M certified, it ensures superior sealing on metal, fiberglass, and flexible HVAC ducts. Its weather-resistant, fast-drying, and low VOC formula exceeds SMACNA pressure and sealing standards, delivering durable, energy-efficient performance for both indoor and outdoor HVAC applications.

Specifications

ASIN	B01I7JVUO0
Best Sellers Rank	#11,026 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #39 in Hardware Sealers
Brand Name	Red Devil
Color	Gray
Compatible Material	Fiberglass, Metal, Plastic
Customer Reviews	4.5 4.5 out of 5 stars (1,547)
Global Trade Identification Number	00075339003466
Included Components	Duct Sealant
Item Dimensions	7 x 7 x 8 inches
Item Form	Paste
Item Type Name	Water Based Duct Sealant, 1 Gallon
Item Weight	16 ounces
Manufacturer	Red Devil
Material Type	Acrylic
Model	0841DX
Number of Items	1
Part Number	0841DX
Style Name	1 - Pack
Supported Standards	UL 181 a-m, UL 181 b-m
Surface Recommendation	Metal
UPC	075339003466
Unit Count	128.0 Fluid Ounces
Water Resistance Level	Water Resistant

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