As an expert in the field of HVAC and plumbing, I have encountered many questions about duct sealant. One of the most common questions is whether or not duct sealant hardens. The answer is no, but there is more to it than just a simple yes or no. In this article, I will delve into the world of duct sealant and provide you with all the information you need to know. What is Duct Sealant?Duct sealant, also known as duct putty, is a sticky material that is widely considered to be the best solution for duct sealing.
It is a soft compound that often resembles mass and is designed for ease of use and installation. Originally developed for air conditioning purposes, duct sealant has become a popular choice for sealing air ducts in both residential and commercial settings. One of the main reasons why duct sealant is preferred by many industry professionals is because it does not harden. This means that it will remain supple and flexible for years, making it easy to remove, reshape, and reapply when needed. Additionally, duct sealant is non-toxic and fire resistant, making it a safe choice for use in homes and buildings. Uses of Duct SealantDuct sealant is primarily used to create a seal that blocks moisture, dust, and air movement.
It can also be used to block noise, making it a versatile solution for various applications. This material is non-conductive and non-corrosive, making it safe to use around electrical connections. However, it should be noted that duct sealant is primarily used to seal air leaks rather than pipe leaks. Therefore, its plumbing applications are somewhat limited. That being said, there are instances where your plumber may use duct sealant when working with appliances such as washing machines, refrigerators, or dishwashers.
This is because duct sealant can be used to protect areas with electrical connections or to ensure that outlets and switches are safe from nearby water sources. Application and MaintenanceApplying duct sealant is a relatively simple process. It is often applied with a caulking gun or spatula and can last up to 20 years. Once the sealant is spread and the ducts are sealed, it can be left in place without any further maintenance. It will not harden or dry out, but it will remain supple and flexible for years. If you need to change the ducts, you can easily cut the sealant with a knife or your fingers.
However, it is important to read and follow the instructions that come with the sealant for the best results. The sealant should be allowed to dry and cure for 48 to 72 hours before turning on the air again. Differences Between Duct Sealing Putty and Plumber's PuttyIt is important to note that there are some differences between duct sealing putty and plumber's putty. The main differences lie in the ingredients used to make them and their melting points. While both types of putty can be used to seal leaks, they are formulated for different purposes. Plumber's putty is primarily used for plumbing applications, while duct sealing putty is designed specifically for sealing air ducts.
This means that duct sealing putty is more effective at creating a reliable seal in air ducts compared to plumber's putty. Professional Duct Sealing ServicesWhile you can easily apply duct sealant yourself, it is always recommended to hire a professional domestic air duct cleaning service for a thorough sealing of your home's air ducts. These professionals use special equipment and technology to seal air ducts from the inside, ensuring that every leak is identified and sealed. However, if you are comfortable going up to the attic, you can also check the sealing of your home's air ducts yourself. In such cases, using sealing putty for air ducts is ideal as it is often cheaper than tapes and other types of sealants, but equally effective at creating a reliable seal. Safety PrecautionsWhen working with any type of sealant, it is important to take safety precautions. This includes wearing gloves, goggles, pants, and long sleeves.
Duct sealant is non-toxic and safe to use in areas with poor ventilation, but it is always better to err on the side of caution. In conclusion, duct sealant does not harden and remains supple and flexible for years. It is a versatile solution for sealing air ducts and has become a popular choice among industry professionals. Whether you are looking to seal air leaks or protect electrical connections, duct sealant is a reliable and effective solution that will last for years to come.
