Author: Site Editor Publish Time: 2025-12-12 Origin: Site
Air leakage is one of the most common causes of energy loss and performance inefficiency in HVAC systems. As a professional HVAC duct sealant manufacturer, we supply high-performance mastic air duct sealants designed for long-lasting, airtight sealing in commercial and industrial ductwork. Our products are widely used by HVAC contractors and system installers seeking reliable, factory-direct sealing solutions.
Mastic Air Duct Sealant is a water-based sealing compound designed for medium to high-pressure HVAC duct systems. Known for its permanent flexibility, excellent waterproofing ability, and strong adhesion, it forms a durable film after curing. Applied with a brush, trowel, or caulking gun, the sealant effectively seals seams, joints, and connections in sheet metal ducts, duct boards, and flexible ducts, making it a trusted solution in residential, commercial, and industrial ventilation systems. Our water-based acrylic mastic sealants are suitable for sheet metal ducts, flexible ducts, and fiberglass ductboard, ensuring strong adhesion across different HVAC materials.
Many homeowners and technicians debate whether tape or sealant is better for duct sealing. Over time, tape tends to lose adhesion due to temperature fluctuations, dust, humidity, and constant vibration within HVAC systems. In contrast, mastic duct sealant forms an airtight, stable bond that does not peel or degrade. By sealing air leaks effectively, it helps maintain system pressure, reduce energy loss, and improve overall HVAC energy efficiency.
Water-based acrylic mastic duct sealants are low in VOC and environmentally friendly, making them suitable for indoor HVAC applications. By preventing air leakage and dust infiltration, they help maintain cleaner airflow throughout the duct system. Their mildew-resistant properties further reduce the risk of mold growth, contributing to healthier indoor air quality.
Unlike traditional duct tape, mastic sealant adheres securely to irregular duct surfaces and remains flexible after curing. It withstands pressure changes, thermal expansion, and constant system vibration without cracking or peeling. This long-term durability makes mastic duct sealant a reliable solution for high-, medium-, and low-pressure HVAC duct systems.
Our mastic duct sealants are designed for a wide range of HVAC sealing applications, including:
Commercial HVAC duct systems
Industrial ventilation and exhaust systems
Sheet metal duct joints and seams
Flexible duct connections
Mechanical rooms and air handling units
They are suitable for both new installations and retrofit duct sealing projects.
Factory-direct supply with stable production capacity
Consistent quality and batch-to-batch performance
OEM & private label packaging available
Technical support for HVAC system requirements
Export experience for global HVAC projects
We work closely with HVAC contractors, distributors, and project engineers to ensure the sealant matches real installation conditions.
Water-based acrylic formulation
Strong adhesion to common duct materials
Low VOC, non-toxic, and odorless
Fast surface drying and easy application
Long-term flexibility after curing
(Technical data sheets and test reports are available upon request.)
As an experienced HVAC duct sealant manufacturer, we offer flexible bulk supply options, including pails, drums, and customized packaging. OEM labeling, carton design, and documentation support are available for distributors and brand partners. Our technical team can assist with:
Product selection
Application guidance
Project-specific sealing recommendations
Looking for a reliable mastic air duct sealant supplier for your HVAC project?
Contact us today to request pricing, samples, or technical specifications. Our team will respond quickly with professional support for your duct sealing needs.
Contact Person：Jenny
Email: jenny@sdsealant.com
Phone Number&WhatsApp: 86-18615350735
