SGP high-strength laminated glass ââDuPont SGP certified processor The companyâs SGP laminated glass uses DuPont SentryGlas ® ionic interlayer material as the interlayer film. It is a safety glass interlayer material. The hardness is 100 times that of the traditional interlayer PVB material, and the strength is 5 times that of the traditional interlayer PVB material. The PVB material has greater strength, higher transparency, and higher compatibility with structural adhesives. Due to its exnt performance, it has been widely used in various super high-rise building curtain walls, large lightweight daylighting roofs, glass guardrails, bullet-proof and explosion-proof maintenance structures and other fields of construction.