Guzhan | Custom Silicone Solutions – For Your Brand
High-Temperature Silicone Masking Plugs & Caps for Powder Coating
We manufacture silicone masking plugs and caps designed for powder coating, anodizing, e-coating, and spray painting. These heat-resistant covers protect threads, holes, studs, and surfaces from coating overspray, ensuring clean, sharp lines and reducing post-process cleaning.
Why industrial buyers choose our masking solutions:
| Comparison item | Other supplier | Guzhan |
| Temperature resistance range | ≤200°C | ≤300°C |
| MOQ | 10,000 pcs | 1,000 pcs |
| Sample time | 15-20days | 7-10days |
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Heat resistance – Withstand up to 300°C (600°F) in curing ovens
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Reusable – Flexible silicone allows multiple uses without tearing
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Custom sizes – From 2mm to 100mm ID, tapered or straight
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Type Inner diameter range Application Cone Plug 2mm - 20mm screw hole,small hold Flangeless Plug 5mm - 50mm threaded hole Pull Plug 10mm - 100mm big hole,pipe opening -
Custom colors – Match your production line coding
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Custom shapes – Flangeless, pull tab, tapered, cone, or disc
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Common applications:
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Automotive parts (bolt holes, threaded studs)
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Aerospace components (critical unpainted areas)
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Industrial fasteners and hardware
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Electronics housings and connectors
Material: High-grade silicone, no melting or deformation at curing temperature. Not for use with solvent-based coatings without testing.
Need a specific size?
Send us your hole diameter, thread size, or part drawing. We‘ll recommend the best plug type and provide a sample within 7 days.Low tooling cost, refundable upon bulk order.
Case:
A certain automotive parts manufacturer required protective plugs for M6 threaded holes. We provided conical silicone plugs, resistant to temperatures up to 600°F, reusable more than five times, with an annual purchase volume of 300,000 pieces.
MOQ from 1,000 pcs per design. Sample in 7-10 days.