Can I Use Duct Tape to Seal My Ducts?

May 16, 2025

We wish the folks who developed duct tape had given it another name; any other name. And even though the origins of the name remain obscure (it seems it was originally called “duck tape,” possibly because it applied to duck fabric or its waterproofing capabilities), it was in the 1950s that the name developed a connection to repairing ductwork. The confusion continues to this day, so many homeowners think a few layers of store-bought gray tape will fix any breaks they discover in the network of ducts that send hot and cooled air through their home.

But… don’t use duct tape on your ducts! We can’t emphasize this enough. Duct tape has some superb uses because of its strength, powerful adhesion, flexibility, and water resistance. But fixing ducts isn’t one of them. Again: duct tape is not to be used for sealing your ducts! You need experts to perform duct sealing in Boerne, TX, like those at [company_name].

You don’t have to take our word on this: extensive tests done at Lawrence Berkeley National Laboratory, Environmental Energy Technologies Division, concluded that under normal or stressful conditions, duct tape used on ducts turns brittle and fails. The popular adhesive tape failed every test the lab put it through—often catastrophically. The state of California outright illegalizes the use of duct tape on actual ductwork, and many building codes across the U.S. also ban duct tape as a solution to ductwork problems.

Commercial duct tape comes with no safety certifications, which means you don’t know what you are purchasing. Duct tape can burn and produce toxic gasses, and that isn’t anything you want attached to something that is channeling the air you breathe!

Professional duct repair technicians sometimes use tape in their work, but it’s a specialized aluminum or metalized tape nothing like commercial duct tape. Experts tend to rely on mastic sealant, a resin-based adhesive, to perform repairs on ducts.

In our DIY age, duct tape has turned into a sort of philosopher’s stone for repairs, leading to the adage: “If anything is wrong, use duct tape!” We have a different adage: “If anything is wrong with your ducts, call professionals!” For your Boerne, TX duct sealing job, leave the roll of gray sticky tape in the drawer and call [company_name]

0 Comments

Submit a Comment

Your email address will not be published. Required fields are marked *

Getting your AC ready for summer

Over the winter, your air conditioning system likely sat idle while you ran your heating system. But now that the weather is starting to warm up, you’re probably switching over to your air conditioning system. Before you just crank on your AC, there are a few things...

Energy Saving AC Tips

We all want to stay comfortable in our homes but we don’t want to have to pay an arm and a leg to do so. Energy efficiency is a priority for homeowners these days as the price of energy seems to be climbing every year. At [company_name], we have over 25 years of...

Common AC Problems

All the use that your air conditioning system gets during the hot summer months here in Texas can take its toll. Air conditioning problems are very common and because of how critical your AC is to your home they can be incredibly frustrating and inconvenient. The San...

How An Air Conditioner Works

Having a basic grasp of the major part of your air conditioning system is a great way for homeowners to be able to discover any problems that could be arising with their AC. At [company_name], we offer fast and reliable San Antonio, TX air conditioning repair and...

We Can Help You Save on Your Energy Bills

San Antonio summers can be brutally hot, but that doesn’t mean your family or your wallet should be feeling the heat. At [company_name], we ensure that your air conditioning unit is running at its peak performance. Our certified technicians offer 24/7 emergency...

What is mini split air conditioning?

Mini-split air conditioning systems, also called ductless mini-split air conditioners, have been around for a very long time. However, they have recently started to gain more popularity with homeowners because of the tremendous benefits that they can have. If you’re...

Replacing Your Air Conditioning System

There are a lot of expenses that come along with owning a home, and it is not always a great time to undertake a project such as an air conditioning replacement. Unfortunately, even the best air conditioners cannot last forever, and quality air conditioning in San...