Window spacers and edge seals in insulating glass units: A state-of-the-art review and future perspectives

Insulating glass (IG) units typically consist of multiple glass panes that are sealed and held together structurally along their perimeters. This report describes a study of edge seals in IG units. First, we summarize the components, requirements, and desired properties of edge construction in IG units, based on a survey of the available literature. Second, we review commercially available window edge seals and describe their properties, to provide an easily accessible reference for research and commercial purposes. Finally, based on the literature survey and review of current commercial edge seal systems, we identify research opportunities for future edge seal improvements and solutions.

► Components, requirements, and properties of edge seals for insulating glass units are investigated.
► Thermal performance of commercially available edge seals is reviewed.
► Non-metal spacers are identified as having the most promising thermal performance for future window spacer applications.