RCD #6 Mastic Air Duct Sealant 2 Gallon UL Listed Low High Velocity

SKU: 106002

Weight	25 lbs
Condition	New
Manufacturer Part Number	106002
Brand	RCD Corporation

$120.06

In stock — available to order.

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Quantity	Unit price	Saving
1–4	$120.06	0%
5–9	$114.06	5%
10+	$108.05	10%

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RCD #6 Mastic Air Duct Sealant 2 Gallon UL Listed Low High Velocity

Specifications & product details

RCD #6 Mastic Low to High Velocity Air Duct Sealant – 2 Gallon

This listing is for a brand new 2-gallon pail of RCD Corporation #6 Mastic, a professional-grade air duct sealant designed to seal all types of HVAC duct systems, including UL listed air ducts, thermal insulation, and crawl space vapor retarders.

#6 Mastic is a water-based, non-flammable, elastomeric sealant that remains flexible while providing a durable, weather-resistant seal. It is fiber reinforced, contains ceramic microspheres, and is UL-181 listed as a complete closure system for both metal and flex duct applications.

Suitable for low to high velocity air systems, this mastic can be applied by brush, trowel, hand, spray, or extrusion, making it a go-to product for HVAC installers and energy retrofit contractors.

Key Benefits:

UL-181A & UL-181B listed
Seals metal, flex, and fiberglass ductwork
Low–high velocity rated
Non-flammable, water-based formula
Fiber reinforced for long-term durability
Ideal for residential & commercial HVAC systems

📌 Always follow manufacturer installation instructions.

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