中文简体
EnglishHigh Heat Resistant Silicone Powder Coating
Industrial-grade protective coating solutions: environmentally friendly, durable, and cost-effective.
Intro to High Heat Resistant Silicone Powder Coating
High Heat Resistant Silicone Powder Coatings are specialized thermoset systems formulated with Silicone Resins that maintain film integrity, color, and protective properties at continuous operating temperatures well beyond the limit of conventional organic coatings (Polyester, Epoxy). These coatings are typically capable of withstanding temperatures from 250∘C up to 550∘C or more, depending on the formulation and pigment choice. They are essential for applications where metal components are in close proximity to combustion processes, engine exhaust, or high-temperature heat sources where other coatings would rapidly oxidize and fail.
Thermal Stability and Inorganic Pigmentation
The extreme thermal stability of this coating is derived from the polysiloxane chemical structure of the silicone resin, which has a higher bond strength and is less prone to thermal degradation than standard carbon-based polymers. As the coating is exposed to heat, the silicone resin undergoes a final, heat-induced post-cure (sometimes referred to as pyrolysis), forming a more robust ceramic-like structure that locks the pigment in place. For high-temperature coatings, the selection of inorganic, heat-stable pigments is critical; standard organic pigments would burn out and cause severe color shift or fading. Common colors are limited to dark functional shades like black, gray, and silver. Applications require a very clean substrate (often abrasive blasted) and the cure schedule must include a gradual ramp to the peak temperature to allow the silicone resin to fully cross-link and perform its high-temperature function without bubbling or losing adhesion.
Specifications
| Property | Standard High Heat Value |
| Base Chemistry | Silicone Resin (Polysiloxane) |
| Continuous Operating Temp. | 250∘C to 550∘C (Pigment dependent) |
| Thermal Shock Resistance | Excellent |
| Pigments Used | Inorganic, Heat-Stable |
| Film Thickness (Recommended) | 20 to 40 microns (Thin film promotes stability) |
| Corrosion Protection | Good (Best when paired with proper metal prep) |
| Cure Schedule (Critical) | Step cure with high final temperature |
| Color Range | Limited (Black, Silver, Gray) |
Application Fields
- Automotive Exhaust Systems: Mufflers, headers, and exhaust pipes.
- Barbecue Grills and Smokers: Fireboxes, lids, and high-heat interior components.
- Industrial Furnaces and Ovens: Exterior panels and structural support near heat zones.
- Heating Elements: Sheathings and metal housings for high-temperature appliances.
- Incinerators and Fireplace Components: Metal structures subjected to continuous high thermal output.
Key Characteristics
- Extreme Thermal Stability: Maintains integrity and color stability under severe, continuous high heat.
- Prevents Metal Oxidation: Forms a protective layer that slows the deterioration and scaling of steel at high temperatures.
- Excellent Adhesion: Maintains a strong bond even under thermal cycling and expansion.
- Thin Film Advantage: Requires a thin film build for optimal heat transfer and stability.
- Color Retention at High Temp: Uses stable inorganic pigments to prevent color burnout.
Comparison: Silicone High Heat vs. Standard Powder
| Feature | Silicone High Heat Resistant | Standard Polyester/Epoxy |
| Maximum Continuous Temp. | 250∘C to 550∘C | <150∘C (Max) |
| Chemical Base | Silicone Polysiloxane | Organic Polymer (Carbon-based) |
| Color Range | Very Limited (Inorganic Pigments) | Unlimited (Organic Pigments) |
| Corrosion Protection | Functional | Excellent (At lower temperatures) |
| Failure Mode | Gradual erosion/oxidation | Rapid burnout, blistering, loss of film |
Why choose us
Customization: We have a strong R&D team,and we can develop and produce products according to different requirement of customers.
Cost: We have our own raw material production center.So we can offer the most favourable price and good-quality products directly.
Quality: We have our own testing lab and the most advanced and complete inspection equipment, which can ensure the quality of our products.
Capacity: Our annual production capacity is over 30000 tons, we can meet the needs of different customers with diverse purchase quantity.
Service: We focus on developing high-quality products for top-end markets. Our products are in line with international standards, and are mainly exported to Europe, America, Southeast Asia, South America and other destinations around the world.
Shipment: We are only 200 kilometers away from the Shanghai Port and 230 kilometers to Ningbo port, it is very convenient and efficient to ship goods to any other countries.
Customization
Quality
Capacity
Service
Shipment
Frequently Asked Questions (FAQs)
- Q: Why is the recommended film thickness so low for high-heat coatings?
- A: Thicker films can trap gasses and organic components, leading to blistering or rapid failure during the initial heating cycles. A thin film allows for faster, more complete curing and pyrolysis of the silicone resin.
- Q: Is the initial cure process for silicone powder different?
- A: Yes. Many high-heat silicone systems require a two-stage cure: a low-temperature initial cure for handling, followed by a final, high-temperature cure in service (the "burn-in") to fully develop the heat resistance.
- Q: Can this powder be used for interior parts of a standard kitchen oven?
- A: Yes. High Heat Silicone is frequently used for oven liners, racks, and components that reach high operating temperatures where standard epoxy would rapidly fail.
Selection Guide: High Heat Resistant Silicone
Select High Heat Resistant Silicone Powder Coating when:
- The component's continuous operating temperature exceeds 200∘C and standard organic coatings are unsuitable.
- The application is subject to thermal cycling and requires excellent thermal shock resistance.
- The component requires a finish that prevents metal scaling and oxidation at elevated temperatures.
- The aesthetic requirement is limited to functional dark colors (black, gray, or metallic silver).
- The substrate can be properly prepared (e.g., abrasive blasted) to ensure maximum adhesion under extreme thermal conditions.
