Guzhan | Custom Silicone Solutions – For Your Brand
Choose the right powdercoat plug for your application: - Masking Cap – for bolts, studs, pipe ends - Tapered Plug – for tapered holes, multiple hole sizes - Pull Plug – for through-holes, blind holes - Thread Plug – for internal threads (M3–M30)
Why Choose Our Powder Coating Plugs?
Our powder coating masking plugs provide a secure seal, keeping holes clean,Powder coating requires precision masking to protect threads, holes, and surfaces from overspray. Without proper masking, you spend hours cleaning cured powder from threads — or worse, scrap parts entirely.
Silicone plugs for powder coating offer excellent heat resistance and reusability
| Feature | Benefit |
| 600°F+ Heat Resistance | Withstand curing oven temperatures without melting or deforming |
| Reusable | Durable silicone allows multiple uses — reduces per-use cost |
| Silicone Material | Won't leach contaminants into plating or anodizing baths |
| Custom Sizes | From 1mm to 100mm — match your exact hole or thread spec |
| Fast Sampling | Samples ready in 7-10 days |
Our Powder Coating Plug Product Line
We manufacture high-quality powder coating plugs, including masking caps, tapered plugs, pull plugs, and thread plugs
1. Masking Cap
For: Bolts, studs, pipe ends, rods, and external protruding parts
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Covers external surfaces from overspray
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ID range: 1mm – 60mm
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Multiple length options available
2. Tapered Plug
For: Tapered holes, ports, threaded holes
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Tapered design fits multiple hole diameters with one SKU — reduces inventory costs
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OD range: 1.6mm – 127mm
3. Pull Plug
For: Through-holes, nuts, blind holes
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Pull-tab design for quick, damage-free removal — no prying, no tearing
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OD range: 1.2mm – 25.9mm
4. Thread Plug
For: Internal threads (M3–M30)
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Flange design masks the lead-in (first) thread — ensures complete thread protection
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Straight wall section keeps plug firmly in place during coating
Quick Selection Guide:
| If you need to protect... | Choose this |
| Bolts, studs, pipe ends | Masking Cap |
| Tapered holes, multiple hole sizes | Tapered Plug |
| Through-holes (both sides) | Pull Plug |
| Internal threads (M3–M32) | Thread Plug |
Technical Specifications
| Parameter | Detail |
| Material | High-grade silicone (fully cured) |
| Temperature Resistance | Up to 600°F (315°C) constant exposure |
| Hardness | Shore A40 – A70 |
| Reusability | Multiple cycles without tearing or degrading |
| Chemical Resistance | Excellent — resists breakdown in plating/anodizing baths |
| Color | Any Pantone (custom) — color coding available for size identification |
| MOQ | 1,000 pcs (trial orders accepted) |
| Sample Time | 7-10 days |
Common Applications
Our silicone plugs withstand temperatures up to 600°F (315°C), ideal for high-heat powder coating curing ovens.”
Unlike masking caps which cover external features, plugs are inserted into holes to provide a secure seal.
Our powder coating plugs are used across multiple industries:
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Automotive Parts – Bolt holes, threaded studs, brake components
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Aerospace Components – Critical unpainted areas, precision threads
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Industrial Fasteners & Hardware – Nuts, bolts, threaded inserts
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Electronics Housings & Connectors – Ports, mounting holes
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General Metal Finishing – Powder coating, e-coating, plating, anodizing
Why Industrial Buyers Choose Us
Our powder coating masking plugs provide a secure seal, keeping holes clean...
Silicone plugs for powder coating offer excellent heat resistance and reusability.
| Comparison | Other Supplier | Guzhan |
| Temperature Resistance | ≤200°C | ≤300°C |
| MOQ | 10,000 pcs | 1,000 pcs |
| Sample Time | 15-20 days | 7-10 days |
| Size Range | Limited | 1mm – 100mm+ |
Case Study: Automotive Parts Manufacturer (US)
Challenge: An automotive supplier needed protective plugs for M6 threaded holes during powder coating. Their existing plugs melted in the curing oven and left powder residue in threads.
Solution: We provided custom silicone thread plugs with optimized Shore A50 hardness — precise fit, 600°F resistance, and easy removal.
Result: 300,000+ pcs/year | Zero leakage complaints | Reusable 5+ times
Custom Sizes Available
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Our high-temp powder coating plugs are ideal for masking holes.
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Unlike masking caps that cover external surfaces, silicone plugs are inserted into holes.
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Need custom powder coating plugs? Send us your drawing for a fast quote
Other Capabilities: Industrial Seals | Vape Accessorie | Promtion Gifts | Household Product