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GI vs PPGI — Galvanized vs Prepainted
GI and PPGI start from the same base steel — the difference is the finish and where each is used.
| GI (Galvanized) | PPGI (Prepainted) | |
|---|---|---|
| Coating | Zinc (Z80–Z275) | Zinc + polyester/PVDF paint |
| Finish | Metallic / spangle | RAL colour, matte/gloss |
| Corrosion life | Good | Better (paint + zinc) |
| Use | Purlins, ducting, forming | Roofing, cladding, appliances |
Choose GI where the surface will be hidden, formed or further coated. Choose PPGI where colour and extra durability are needed on show — roofing and cladding.
We supply both — galvanized coil and PPGI coil, plus roofing sheet.
Frequently asked questions
Is PPGI just painted GI?
Essentially yes — PPGI is galvanized (or galvalume) coil with a factory-applied paint system, giving colour and extra corrosion life.
Which lasts longer, GI or PPGI?
PPGI generally lasts longer outdoors because the paint layer protects the zinc; the exact life depends on coating class and environment.
What colours does PPGI come in?
The full RAL range in polyester or PVDF, matte or gloss.
Need mill-certified steel in bulk?
Steel Pro Rebar Germany Gmbh exports structural steel, rebar, coil, plate and sections worldwide with EN 10204 3.1 MTCs.
Request a bulk quote →WhatsApp: +49 163 1141934