High Temp Silicone Pull Plugs for Powder Coating & Plating
Leader Masking Tapered Plugs are the industry standard for masking holes during Powder Coating, E-Coating, Anodizing, and Plating.
Made from high-grade silicone, these plugs can withstand temperatures up to 600°F (315°C) without melting or hardening. The tapered design allows one plug to fit a range of hole sizes, ensuring a tight leak-proof seal.
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Material: 100% High-Temp Silicone
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Temp Resistance: 315°C / 600°F
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Color: Color-coded by size (Custom colors available)
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Application: Threaded and non-threaded holes
Description
Product Overview
Designed for the toughest industrial masking environments, our Silicone Tapered Plugs are the ultimate solution for protecting holes, threads, and internal cavities. Whether you are doing high-temp powder coating or chemical anodizing, our plugs ensure clean threads and zero rework.
Key Features & Benefits
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Extreme Heat Resistance: Withstands intermittent temperatures up to 315°C (600°F) suitable for high-cure powder coating ovens.
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Chemical Resistance: Excellent resistance to acids, alkalis, and harsh chemicals used in plating and anodizing baths.
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Reusable & Durable: The silicone material does not harden after heating. Paint and powder coating build-up can be easily peeled off, allowing for multiple uses.
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Flexible Tapered Design: The cone shape allows the plug to be pushed into the hole for a tight friction fit. One size can mask multiple hole diameters.
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No Residue: Clean removal without leaving silicone oil or sticky residue on the part.
Technical Specifications
| Property | Specification |
| Material | High-Grade Silicone Rubber |
| Durometer (Hardness) | 55 Shore A (Standard) |
| Max Temperature | 600°F (315°C) |
| Min Temperature | -40°F (-40°C) |
| Reusable | Yes |
| Chemical Resistance | Excellent (Acids, Alkalis, Oxidizers) |
Standard Size Chart
| No. | Model No. | Small Head Diameter d (mm) | Large Head Diameter D (mm) | Length L (mm) | Specification (Small Head * Large Head * Height) | Qty per Bag (pcs) | Recommended Hole Diameter (mm) | Internal Model No. |
| 1 | LM010-025-130 | 1 | 2.5 | 13 | 1×2.5×13 | 1000 | 2 | M2 |
| 2 | LM515-035-160 | 1.5 | 3.5 | 16 | 1.5×3.5×16 | 1000 | 3 | M3 |
| 3 | LM020-042-160 | 2 | 4.2 | 16 | 2×4.2×16 | 1000 | 4 | M4 |
| 4 | LM020-060-230 | 2 | 6 | 23 | 2×6×23 | 1000 | 5 | M5 |
| 5 | LM030-080-210 | 3 | 8 | 21 | 3×8×21 | 1000 | 6 | M6 |
| 6 | LM048-087-160 | 4.8 | 8.7 | 16 | 4.8×8.7×16 | 1000 | 8 | M8 |
| 7 | LM045-085-200 | 4.5 | 8.5 | 20 | 4.5×8.5×20 | 1000 | 8 | M8 |
| 8 | LM070-120-250 | 7 | 12 | 25 | 7×12×25 | 1000 | 10 | M10 |
| 9 | LM079-127-250 | 7.9 | 12.7 | 25 | 8×13×25 | 1000 | 12 | M12 |
| 10 | LM090-143-250 | 9 | 14 | 25 | 9*14*25 | 500 | 12 | M12 |
| 11 | LM103-150-250 | 10 | 15 | 25 | 10×15×25 | 500 | 14 | M14 |
| 12 | LM127-167-250 | 12.7 | 16.7 | 25 | 12.7×16.7×25 | 100 | 16 | M16 |
| 13 | LM130-170-250 | 13 | 17 | 25 | 13×17×25 | 250 | 16 | M16 |
| 14 | LM159-198-250 | 16 | 20 | 25 | 16×20×25 | 250 | 18 | M18 |
| 15 | LM183-248-250 | 18 | 24 | 25 | 18×24×25 | 200 | 20 and 22 | M20 M22 |
| 16 | LM198-254-250 | 19.8 | 25.4 | 25 | 20*25*25 | 100 | 24 | M24 |
| 17 | LM328-279-250 | 23 | 27.9 | 25 | 24×28×25 | 100 | 26 | M26 |
| 18 | LM362-320-250 | 26.2 | 31.8 | 25 | 26×32×25 | 100 | 30 | M30 |
| 19 | LM270-330-250 | 27 | 33.4 | 25 | 27×33.4×25 | 100 | 30 and 32 | M32 |
| 20 | LM300-365-250 | 30 | 36.5 | 25 | 30×36×25 | 100 | 34 | M34 |
| 21 | LM318-389-250 | 31.8 | 38.9 | 25 | 32×39×25 | 100 | 36 | M36 |
| 22 | LM334-413-250 | 33.4 | 41.3 | 25 | 33.4×41.3×25 | 100 | 38 | M38 |
| 23 | LM357-429-250 | 35.7 | 42.9 | 25 | 36×43×25 | 100 | 40 | M40 |
| 24 | LM381-461-250 | 38.1 | 46.1 | 25 | 38.2×46.1×25 | 100 | 44 | M44 |
| 25 | LM413-500-250 | 41.3 | 50 | 25 | 41×50×25 | 50 | 46 (Split Hole / No Hole) | M46 |
| 26 | LM445-524-250 | 44.5 | 52.4 | 25 | 44.5×52.4×25 | 50 | 50 | M50 |
| 27 | LM027-147-M3 | 2.7 | 15 | 10 | Φ2.7×14.7 | 1000 | Blind Hole M3 | Blind Hole M3 |
| 28 | LM040-010-M4 | 4 | 14.7 | 10 | Φ4×14.7 | 1000 | Blind Hole M4 | Blind Hole M4 |
| 29 | LM064-095-190 | 6.4 | 9.5 | 19 | 6.4×9.5×19 | 1000 | – | – |
📏 How to Choose the Right Size?
Don’t worry about the fit. Follow these 3 simple steps to find your perfect plug:
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Step 1: Measure Your Hole 🟢
Measure the diameter of the hole you need to mask. -
Step 2: Check the Dimensions 📐
Look at our size chart. You need a plug where:-
The Bottom Diameter (B) is smaller than your hole.
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The Top Diameter (A) is larger than your hole.
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Step 3: The Perfect Fit ✅
Push the plug in until it creates a tight seal. Since it is tapered, one size can fit multiple hole diameters!
🏭 Industry Applications
Our Silicone Tapered Plugs are trusted by professionals in:
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🖌️ Powder Coating: Withstands 315°C curing ovens. No melting.
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⚡ E-Coating: Leak-proof seal prevents liquid ingress.
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🛁 Anodizing & Plating: Resists acids and chemical baths.
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🚗 Automotive Refinishing: Protects threaded holes during painting.
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🛠️ Sandblasting: Protects threads from abrasion damage.
Why Choose Leader Masking?
As a direct factory from China, Leader Masking provides high-quality masking solutions at competitive prices. We control the entire production process from raw silicone mixing to vulcanization and packaging.
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Factory Direct Price: Save 10-20% compared to local distributors.
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Huge Stock: We keep millions of plugs in stock for fast shipping.
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Custom Molding: Need a special shape? We can create custom molds in 7 days.
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