Tape University® | Building & Construction

What is mastic?

By: Glenn Walter

August 5, 2016

Mastic is a water-based paste that can be applied to seams in an HVAC system in order to help seal the system.

It is typically used to fill crevices that an HVAC tape can’t reach, especially because of its peanut butter-like consistency, which allows it to conform to any shape. Used to create airtight seals, mastic can withstand extreme temperature differences, and with proper application, can last for years.

Sometimes used over tape, this adhesive can be easily applied to joints of a duct system, with the only limitation being the ability to reach a joint. Codes will dictate when a mastic needs to be used.

HVAC Tape

Glenn Walter

As a Regional Sales Manager for Shurtape Technologies, LLC, Glenn Walter manages the sales force for half the country in the HVAC and Electrical markets. As a product manager for over four years previous to his current role, Glenn was responsible for leading the product development and marketing support for the Building and Construction Tapes category. Glenn started working with Shurtape in 2012. Before that, he owned construction and framing companies with his brothers. The years he spent on the jobsite helped him create a pretty good foundation in the building and construction fields – so he's been there, done that. It gives him a unique perspective when it comes to tape. Glenn is a graduate of Cornell University with a Bachelor’s degree in Consumer Economics and Housing.