Why Get FSK?

FSK is a Class A vapor retarder that has great versatility in industries like metal building, construction, and aerospace. FSK is a flame-retardant material designed to protect things like duct boards and the outward-facing, exposed surfaces of HVAC ductwork. This type of insulation coating has the ability to prevent water from getting in and is commonly utilized for outdoor applications as it tends to be less expensive and more readily available than alternatives like PSK. FSK facing is silver in color, just like aluminum foil, and it is one of the most common insulation facings on the market.


FSK insulation is commonly used by original equipment manufacturers during the construction of duct wraps, duct boards, and other common HVAC applications. This type of insulation facing serves both as a vapor barrier that controls moisture and a protective layer over the insulation’s fiberglass. It is extremely useful in terms of reducing the risk of combustion and in terms of helping with long-term energy savings, as it improves the quality and longevity of a building’s insulation. If you are ready to provide your clients with insulation or other products that are more durable, better-protected, and that improves their lifelong savings, order FSK vapor barriers from Winona Building Products today!


What makes our products different from our competitors’ is that we use a proprietary adhesive formula that gets the job done — optimally adhering to everything it needs to while also being fire-retardant — without the use of any chemicals listed by the International Living Future Institute as dangerous to humans or the environment. If you want to learn more about what FSK vapor retarder, have a question, or would like to place an order, give us a call today! We’ll get back to you as soon as we can. 


We believe that eco-friendly vapor barriers are the future. If you would like to learn more about PSK or other insulation facing options, contact us online or give us a call today. Want to order PSK vapor barriers today? Our customer service experts are waiting for your call! 

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