Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of ppgi smp (silicone modified polyester) coating in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
PPGI SMP (Silicone Modified Polyester) is a pre-painted galvanized steel product coated with a modified polyester system enhanced by silicone additives. Compared to conventional PE coatings, SMP provides superior weather resistance, improved UV stability, and longer service life.
It is widely used in industrial roofing and wall cladding systems, especially in regions with high sunlight exposure and moderate corrosion conditions.
Technical Specifications
Base Material
Substrate: Hot-Dip Galvanized Steel (GI)
Zinc Coating: Z40 – Z275 (120–275 g/m²)
Coating System
Top Coating: SMP (Silicone Modified Polyester)
Top Coat Thickness: 20–30 μm
Back Coat Thickness: 5–10 μm
Total Coating Thickness: 25–40 μm
Dimensions
| Parameter | Metric | Imperial |
|---|---|---|
| Thickness | 0.12 – 1.2 mm | 0.0047" – 0.047" |
| Width | 600 – 1500 mm | 23.6" – 59" |
| Coil Weight | 3 – 8 MT | 3.3 – 8.8 Tons |
| Length (Sheet) | Custom Cut | Custom Cut |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength | 230 – 550 MPa |
| Tensile Strength | 270 – 600 MPa |
| Elongation | ≥ 20% |
Coating Performance
| Property | SMP Performance |
|---|---|
| UV Resistance | Good |
| Color Retention | Good |
| Chalk Resistance | High |
| Corrosion Resistance | Good |
| Heat Resistance | Up to 120°C |
| Surface Hardness | High |
| Expected Lifespan | 10–15 Years |
Key Advantages
Enhanced Weather Resistance → Better than standard PE coatings
Improved UV Stability → Reduced fading and chalking
High Surface Hardness → Scratch-resistant, durable finish
Cost-Effective → Ideal balance between PE and PVDF
Good Heat Resistance → Suitable for hot climates
Applications
Industrial roofing sheets
Steel structure buildings
Warehouses and factories
Agricultural buildings
Wall cladding systems
Prefabricated houses
PPGI SMP vs Other Coatings
| Feature | PE | SMP | PVDF |
|---|---|---|---|
| Cost | Low | Medium | High |
| Lifespan | 5–10 yrs | 10–15 yrs | 20–30+ yrs |
| UV Resistance | Medium | Good | Excellent |
| Hardness | Medium | High | Medium |
| Best Application | General | Industrial | Coastal/High-end |
Export Market Insights
Middle East (UAE, Saudi Arabia) → Strong demand due to heat resistance
Southeast Asia → Ideal for tropical climate roofing
Africa → Cost-effective upgrade from PE
South America → Growing demand in industrial projects
Inspection & Quality Assurance
We implement a strict multi-stage quality control system:
Raw material inspection (GI substrate & zinc coating weight)
Coating thickness testing (micron gauge)
Adhesion testing (T-bend / cross hatch)
Gloss & color consistency inspection
Salt spray testing (ASTM B117)
Third-party inspection available (SGS / BV / TUV)
Product Delivery Standards
Standard seaworthy export packing
Inner: Waterproof paper + plastic film
Outer: Galvanized steel sheet protection
Coil ID: 508mm / 610mm
Edge protection + steel strapping
FAQ
What is SMP coating in PPGI?
SMP (Silicone Modified Polyester) is an enhanced polyester coating with improved UV resistance, hardness, and durability.
Is SMP better than PE?
Yes, SMP offers better weather resistance and longer lifespan than PE coatings.
Can SMP PPGI be used for roofing?
Absolutely. It is one of the most widely used coatings for industrial roofing sheets.
How long does SMP PPGI last?
Typically 10–15 years, depending on environmental conditions.
Is SMP suitable for coastal areas?
Not recommended. PVDF coating is preferred for marine environments.
Contact Us
Looking for a reliable PPGI SMP steel supplier?
We provide:
Competitive factory pricing
Fast delivery (7–15 days)
Custom colors (RAL system)
OEM & project support
👉 Contact us today to get a free quote and technical consultation
+8615769214734
office@dongmjd.com
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