The Truth About Duct Sealant: Debunking Common Misconceptions

As an expert in the HVAC industry, I have encountered many misconceptions about duct sealant and its properties. One of the most frequently asked questions is whether or not duct sealant will dry out over time. The simple answer is no, it won't. But let me explain why.

Duct sealant

, also known as duct sealing putty, is a soft compound used to create a seal in air ducts.

Its purpose is to block moisture, dust, and air movement, and it can even help reduce noise. This material is non-conductive and non-corrosive, making it safe to use around electrical connections. And the best part? It will never dry out. When applied correctly, duct sealant will remain supple and flexible for years to come. This means that it can easily be removed, reshaped, and reapplied if needed.

It's no wonder why it was originally developed for air conditioning purposes. But don't be fooled by its name - duct sealant is not just for sealing ducts. While it is primarily used for HVAC purposes, it can also be utilized by plumbers to protect areas with electrical connections or to ensure that outlets and switches are safe from nearby water sources. However, it should be noted that duct sealant is not suitable for sealing pipe leaks; its purpose is to seal air leaks. There are various types of duct sealants available on the market, but duct sealing putty is considered one of the best. Its soft consistency makes it easy to handle and install for various HVAC purposes.

It is especially effective at sealing holes and leaks in air ducts. So why should you bother using duct sealant? Well, according to studies, the average home wastes 20 to 30 percent of airflow due to duct leaks. That's a significant amount of energy and money going to waste. By properly sealing your ducts with duct sealant, you can increase the efficiency of your HVAC system and save on energy costs. Now that you understand what duct sealant is and how it can benefit your HVAC system, let's dive into when and how to use it properly.

Choosing the Right Duct Sealant

If you're planning on using duct sealant to seal duct openings, it's essential to use quality materials. Don't try to skimp on cheaper brands; they may not be as effective and could end up costing you more in the long run. When shopping for duct sealant, look for products that are specifically designed for HVAC purposes.

These will typically have a soft consistency and be easy to mold and shape. Avoid using masking tape as a substitute; it is not as effective at sealing air leaks.

How to Use Duct Sealant

Now that you have the right duct sealant, it's time to learn how to use it properly. Here are the steps you should follow:
  1. Clean the surface: Before applying duct sealant, make sure the surface is clean and free of any debris or dust. This will ensure that the sealant adheres properly.
  2. Prepare the sealant: Knead the duct sealant in your hands until it becomes soft and pliable.

    This will make it easier to work with.

  3. Apply the sealant: Using your hands, mold the duct sealant into a rope-like shape and press it firmly into any holes or gaps in your air ducts. Make sure to cover the entire area thoroughly.
  4. Smooth out the sealant: Once the sealant is in place, use your fingers to smooth it out and create a tight seal. This will help prevent any air leaks.
  5. Let it cure: Duct sealant does not dry out, but it does need time to cure. It's best to let it sit for at least 24 hours before turning on your HVAC system.
And that's it! You now have a properly sealed air duct that will help improve the efficiency of your HVAC system.

Conclusion

Duct sealant is a valuable tool in the HVAC industry.

It is designed to block moisture, dust, and air movement, and will never dry out. By using duct sealant to seal your air ducts, you can increase the efficiency of your HVAC system and save on energy costs. Just remember to choose quality materials and follow the proper steps for application. With duct sealant, you can ensure that your HVAC system is running at its best for years to come.