RCD #9 Mastic 2 Gal UL Duct Sealant Low High Velocity HVAC White

Overview

RCD Corporation #9 Mastic – 2 Gallon Low to High Velocity Air Duct Sealant

RCD #9 Mastic is a professional-grade, UL-listed HVAC duct sealant engineered for sealing low and high velocity air duct systems. Designed for use on UL-listed sheet metal ducts, insulated duct systems, and house wrap applications, this mastic provides superior air sealing performance in residential and commercial HVAC installations.

Formulated with ceramic microspheres, #9 Mastic delivers excellent durability, weather resistance, and thermal stability. It resists water, remains flexible, and maintains strong adhesion under demanding conditions.

Key Benefits:

• 2 Gallon Pail – Contractor Size• UL Listed for HVAC Duct Sealing• Suitable for Low & High Velocity Systems• Brush, Trowel, Spray or Extrusion Application• White Finish• Low Odor, Non-Flammable Formula• Water Resistant & Weather Resistant• EPA Biocide Protection Against Microbial Growth• Contributes to LEED Credits

Applications

• • Commercial HVAC Duct Sealing• Residential Forced Air Systems• Crawl Space Sealing• Termite Monitoring Zones• Insulated Duct Systems
• This sealant is ideal for professional HVAC contractors seeking reliable, code-compliant duct sealing with long-term durability.

Product details

Part / SKU	109002

Package includes

• RCD #9 Mastic 2 Gal UL Duct Sealant Low High Velocity HVAC White

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.