Performing thermal insulation repairs to your commercial HVAC system isn’t trivial, and it’s easy to get overwhelmed by the number of different products and methods. In light of this, we’ve taken the time to prepare a guide on how to pick the right FiberLock products and also how to use them for locking down insulation fibers and repairing commercial duct liner surfaces.

In a nutshell, the HVAC thermal insulation repair workflow involves:

Preparing the surface to be coated
Applying the FiberLock coating

Without further ado, let’s go over what FiberLock which solution is right for you, and how it should be used.

Choosing the Right Product

FiberLock has four products that are meant for use as HVAC sealants in commercial facilities: IAQ 7000, IAQ 7500, IAQ 8000, and IAQ 8500. All of the FiberLock HVAC sealants contain fungistatic and antimicrobial components which resist mold growth on the air-facing surface. The antimicrobial component will prevent any implanting of mold spores which may be circulating throughout your HVAC system.

The IAQ 7000 and IAQ 7500 products are penetrating coats intended for minimizing dirt buildup and for trapping particulates which may exist on the duct surface, and come in either white or clear. In contrast, the IAQ 8000 and IAQ 8500 products are intended for high performance applications such as reinforcing duct liner, and come in white or black.

For commercial applications, IAQ 8000 is probably your best bet. We use IAQ 8000 for most of our duct reinforcement, duct repair, and insulation sealant work because it’s quick, easy, cheap, and effective.

Using FiberLock HVAC Sealant

The FiberLock HVAC sealants share the same protocol for use. First, a professional should turn off the airflow through the ductwork and then don the appropriate protective equipment, such as a respirator and gloves. Next, it’s time to clean the ductwork or insulation. A professional cleaner shoud make sure that the surfaces of the are completely clean and free of particulates. After the area is clean, the professionals will let it dry completely.

Once everything is dry, it’s time to apply the sealant. As always, we recommend that a professional commercial air duct cleaner do this, as they are trained to handle all materials and any issues that arise. First, they’ll make sure that the ambient and duct surface temperatures are warmer than 50 degrees Fahrenheit, or the sealants won’t work properly. Additionally, ambient humidity should be low before starting to apply the sealant for the same reason.

The sealant can be applied with a roller, brush, or spray. Whichever sealant you choose, remember that the guidelines for sprayer settings will vary depending on the product. FiberLock also advertises that their sealant systems are compatible with robotic spray applicators, if you happen to have one.

A professional will mix the sealant until it’s homogenous, then apply it with the tool of your choice. The sealants take between eight and sixteen hours to dry enough to be recoatable. If using a brush or applying the sealant to a porous surface, expect to apply two coats. Circulating air through the system will cause the coating to dry faster than it would otherwise, so it’s recommended. The sealant will protect the ductwork for quite some time.

Cleaning Up

Tools should be cleaned before the sealant dries, as caking occurs rapidly. Warm water with some soap will be sufficient for professionals. Make sure the professional you hire removes all potentially hazardous waste safely, and store all FiberLock materials properly in a dry place where it won’t freeze or heat up beyond 95 degrees Fahrenheit. They will also be sure to mix the materials completely if you start to use them again after a long delay.

Now, you’re all set to request the use of the FiberLock system for every commercial thermal insulation repair job your commercial facility may need moving forward!