Duct Sealant Tape Vs. Mastic: What’s The Difference?

When it comes to sealing ductwork, there is often a lot of confusion about the differences between duct sealant tape and mastic. Both are used to seal ductwork but have very different properties, making them suitable for different applications.

In this blog, we’ll explore the differences between duct sealing tape and mastic so you can decide when to select the right product for your application.

Understanding the Difference Between Duct Sealing tape and Mastic

When completing a home improvement or remodeling project, it is crucial to understand the difference between duct sealing tape and mastic. Duct sealing tape is a flexible, adhesive tape used to seal joints and seams in ductwork.

It’s perfect for areas that require a strong, airtight seal. It is often used in ducts that carry hot or cold air, such as central air conditioning and heating systems. It is important to note that duct sealing tape is not a substitute for mastic.

Mastic is a type of sealant that is thicker and more durable than duct sealing tape. It is often used to seal larger openings around pipes and between ducts. Mastic is also used to seal off any gaps or cracks that may be present in the ductwork. It can be used in residential and commercial applications and is often used when a more robust seal is needed.

What Is Duct Sealing tape?

Duct sealing tape is a type of tape for sealing air ducts. It is a solid and durable tape resistant to temperature and humidity changes. The tape is easy to install and does not require any special tools. It also provides an airtight seal, making it an excellent choice for air ducts.

The tape is designed to provide a strong, reliable bond, prevent air leaks, and resist heat, moisture, and UV radiation. Here are five advantages of duct sealing tape that make it an excellent choice for any project:

  1. Easy to Apply: One of the great things about duct sealing tape is its straightforward use. All you have to do is cut it to the desired length and apply it to the surface you want to seal. The tape comes in various widths and lengths to find one suitable for your project. It also has a strong adhesive backing to adhere to most surfaces without additional adhesive.
  2. Durable: Duct sealing tape is designed to be incredibly durable. It is made from a strong, flexible material that can withstand heat, moisture, and UV radiation. This makes it ideal for outdoor applications, as it can withstand the elements without breaking down. The tape also resists cracking and peeling, remaining secure for years.
  3. Versatile: Another benefit of duct sealing tape is its versatility. It can seal various materials, such as wood, metal, plastic, and masonry. This makes it an excellent choice for multiple projects, from air ducts and ventilation systems to windows and doors.

What Is Mastic?

Mastic is a type of sealant for use in sealing air ducts. It is a thick, sticky substance that is easy to apply and provides an airtight seal. Unlike duct sealing tape, mastic requires special tools and must be applied in several layers. It is also more expensive than duct sealing tape.

Mastic has many advantages over other materials, and it is easy to see why it has become so popular over the years. Here are three critical benefits of mastic:

  1. Flexibility: Mastic is highly flexible, which makes it ideal for use in areas where it needs to be able to move. This makes it great for use in areas subject to temperature changes, such as basements and attics.
  2. Insulation: Mastic is an excellent insulator that protects surfaces from extreme temperatures. This makes it perfect for use on roofs and walls, as it can help keep the home’s interior cool in the summer and warm in the winter.
  3. Longevity: Mastic is a long-lasting material that can last for many years. This makes it perfect for use in areas where it needs reliability, such as roofs and walls. It is also highly resistant to wear and tear, which makes it ideal for use in areas that need to be durable.

Factors to Consider When Selecting the Right Product

When selecting between duct sealing tape and mastic, it is vital to consider the ductwork size, the surface material, and the desired lifespan of the seal. For smaller ducts and surfaces not prone to corrosion, duct sealing tape is often preferred. However, mastic is usually the better option for larger ducts, providing a more permanent seal.