V-Glass, a U.S.-based research and development company focused on advancing vacuum insulating glass (VIG), has secured $3 million in seed funding led by the Grantham Foundation for the Protection of the Environment and its affiliate, Neglected Climate Opportunities. The investment is complemented by a $1 million grant from the Advanced Research Projects Agency-Energy, reinforcing support for the company’s transition from laboratory development to pilot-scale manufacturing.

Headquartered in Waukesha, V-Glass is developing a room-temperature, high-speed ultrasonic welding process designed to produce low-conductivity edge seals for VIG units. This approach eliminates the need for high-temperature sealing methods, which are typically energy-intensive and limit scalability. The company is integrating this process with a refined spacer system and plasma-based vacuum degassing to enable faster and more cost-efficient production cycles.

The funding will be directed toward advancing automation and manufacturing capabilities, with a focus on establishing a pilot production facility. This marks a critical step in demonstrating the commercial viability of V-Glass’ technology and validating its performance at scale.

VIG is increasingly recognized as a high-performance glazing solution, but cost has remained a key barrier to widespread adoption. By targeting both process efficiency and material performance, V-Glass aims to reduce production costs while maintaining ultra-low thermal conductivity.

With buildings losing a significant portion of heat through windows, the company’s innovation is positioned to address a major inefficiency in the built environment, supporting both energy savings and decarbonization goals.