Mack Trucks introduces ImpactShield technology

Mack Trucks recently unveiled ImpactShield, which the manufacturer says represents the first use of Corning Fusion5 glass in a Class 8 truck.

Now standard on the all-new Mack Granite, ImpactShield delivers a “significant” advancement in windshield durability, damage resistance, and total cost of ownership, bringing automotive-grade glass technology to one of the most demanding vocational trucks on the market.

“Mack customers don’t have time for unplanned stops, and neither do we,” Tim Wrinkle, Mack vice president and product owner for vocational and medium duty, said in a news release. “Partnering with Corning to bring Fusion5 Glass to heavy-duty trucking isn’t just about using better materials; it’s about finding every possible way to keep our customers’ trucks on the job and their costs under control.”

Corning Fusion5 Glass is the world’s first glass engineered specifically for automotive exterior applications, designed to withstand sharp impact strikes and resist damage in demanding operating environments, Mack explained. For Class 8 truck applications—in which vehicles face constant exposure to road debris, extreme temperatures, and harsh jobsite conditions—the technology can help protect drivers and reduce maintenance costs.

Compared with a standard Class 8 windshield, ImpactShield’s one-piece bonded curved windshield design delivers measurable performance advantages, including two times better sharp impact resistance, two times better thermal shock resistance, five times better scratch resistance, improved resistance to environmental wear and weathering, weight reduction, and improved defrost performance, according to testing performed and verified by Corning.

Reduced windshield damage means fewer unplanned service events and lower glass replacement costs over the life of the vehicle, offering a tangible return on investment for fleet operators, Mack added.

“Corning Fusion5 Glass represents a significant advancement in automotive glazing solutions, addressing a real-world problem of breakage, while providing real economic benefits to customers,” said Mike Kunigonis, vice president and general manager at Corning Automotive Glass Solutions. “Introducing this technology with Mack demonstrates our relentless commitment to helping solve customers’ toughest challenges, now including those in the heavy-duty truck market.”

Mack’s ImpactShield windshield featuring Corning Fusion5 Glass is standard on the all-new Mack Granite, which will be available for order in the latter half of 2026, with production beginning in January 2027 at Mack’s Lehigh Valley Operations facility in Macungie, Pennsylvania. Customers can also choose a one-piece curved Mack Aero windshield.

ImpactShield technology will also be available as an upgrade to the Aero windshield on the Mack Pioneer, all-new Mack Anthem, and Mack Keystone models.