Warm Edge Technology refers to the type of spacer material used to separate the panes of glass (or glazing) in an insulating glass (IG) window unit. If the material conducts less heat or cold than a conventional aluminum spacer at the edge of the glass, it is said to be warm edge. Most of these newer window spacers are less conductive and outperform aluminum. But there's one small problem – they still may contain some kind of metal, which is highly conductive.

 

Unlike these "warm edge” options that contain stainless steel or aluminum, Super Spacer^® is made of 100 percent structural foam. Super Spacer's TrueWARM^® NO-Metal formula blocks the heat escape path and provides some of the best thermal performance and durability in the industry.