Comparison of Performance
- Corrosion Resistance: PPGL’s aluminum-zinc alloy provides better long-term protection against the elements, especially in harsh environments. The aluminum creates a stable oxide layer that blocks corrosion, while the zinc provides sacrificial protection.
- Heat Reflectivity: Due to its aluminum content, PPGL reflects more heat than PPGI. This can help keep buildings cooler and improve energy efficiency.
- Edge Protection: PPGI actually performs slightly better at cut edges. Zinc is more effective at “healing” exposed edges through sacrificial protection, whereas PPGL’s honeycomb structure can leave cut edges more vulnerable to rust if not treated.
- Workability: PPGI is generally considered more flexible and easier to process (bend/stamp) than PPGL, which can sometimes be more brittle due to its aluminum content.
Which One Should You Choose?
- Choose PPGI if: You are working on a budget-conscious project in a mild environment (rural or inland areas). It is widely used for residential roofing, siding, and home appliance bodies.
- Choose PPGL if: You are in a harsh environment, such as a coastal area with salty air or an industrial zone with high pollution. It is also the better choice for high-temperature applications like chimney pipes and ovens.
