4 major differences between PPGI and PPGL

Quick Answer: What Is the Difference Between PPGI and PPGL? The main difference between PPGI and PPGL is the metallic coating used to protect the steel substrate. PPGI uses a galvanized steel base with a zinc coating, while PPGL uses a galvalume steel base coated with a zinc-aluminum alloy. In general, PPGL offers stronger long-term […]