White Silicone Gasket Pads 20 Pack - Waterproof Seal Discs 0.5-5mm for Plumbing
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Standard shipping is included in the price of listed standard-size products. Contact us for expedited shipping or delivery arrangements for custom or oversized orders. Returns are accepted for quality problems under our refund policy, without limiting applicable statutory rights.
- WHITE / 90mm x 2mm / 20pcs - $46.35
- WHITE / 100mm x 2mm / 20pcs - $56.27
- WHITE / 40mm x 2mm / 20pcs - $30.39
- WHITE / 45mm x 2mm / 20pcs - $32.84
- WHITE / 35mm x 2mm / 20pcs - $29.74
- WHITE / 38mm x 2mm / 20pcs - $35.94
- WHITE / 25mm x 2mm / 20pcs - $30.75
- WHITE / 30mm x 2mm / 20pcs - $28.96
- WHITE / 25mm x 3mm / 20pcs - $31.09
- WHITE / 30mm x 3mm / 20pcs - $31.73
- WHITE / 18mm x 3mm / 20pcs - $29.37
- WHITE / 20mm x 3mm / 20pcs - $29.27
- WHITE / 5mm x 3mm / 20pcs - $28.26
- WHITE / 10mm x 3mm / 20pcs - $28.36
- WHITE / 5mm x 2.5mm / 20pcs - $28.26
- WHITE / 38mm x 2.5mm / 20pcs - $35.02
- WHITE / 5mm x 2mm / 20pcs - $28.26
- WHITE / 7mm x 2mm / 20pcs - $28.45
- WHITE / 5mm x 1.5mm / 20pcs - $28.26
- WHITE / 22mm x 1.5mm / 20pcs - $29.48
- WHITE / 100mm x 1mm / 20pcs - $40.50
- WHITE / 104mm x 1mm / 20pcs - $48.29
- WHITE / 50mm x 1mm / 20pcs - $30.60
- WHITE / 60mm x 1mm / 20pcs - $32.45
- WHITE / 20mm x 2mm / 20pcs - $27.79
- WHITE / 22mm x 2mm / 20pcs - $30.06
- WHITE / 16mm x 2mm / 20pcs - $27.56
- WHITE / 18mm x 2mm / 20pcs - $27.66
- WHITE / 12mm x 2mm / 20pcs - $27.12
- WHITE / 15mm x 2mm / 20pcs - $27.34
- WHITE / 8mm x 2mm / 20pcs - $27.32
- WHITE / 10mm x 2mm / 20pcs - $27.36
- WHITE / 12mm x 1mm / 20pcs - $27.12
- WHITE / 15mm x 1mm / 20pcs - $27.34
- WHITE / 8mm x 1mm / 20pcs - $27.32
- WHITE / 10mm x 1mm / 20pcs - $27.36
- WHITE / 4mm x 1mm / 20pcs - $27.03
- WHITE / 5mm x 1mm / 20pcs - $27.03
- WHITE / 5mm x 0.5mm / 20pcs - $27.03
- WHITE / 40mm x 1mm / 20pcs - $28.96
- WHITE / 45mm x 1mm / 20pcs - $29.02
- WHITE / 30mm x 1mm / 20pcs - $28.88
- WHITE / 35mm x 1mm / 20pcs - $28.82
- WHITE / 20mm x 1mm / 20pcs - $28.75
- WHITE / 25mm x 1mm / 20pcs - $28.81
- WHITE / 16mm x 1mm / 20pcs - $28.75
- WHITE / 18mm x 1mm / 20pcs - $28.75
- WHITE / 100mm x 3mm / 20pcs - $59.01
- WHITE / 17mm x 4mm / 20pcs - $31.09
- WHITE / 60mm x 3mm / 20pcs - $40.32
- WHITE / 80mm x 3mm / 20pcs - $49.95
- WHITE / 40mm x 3mm / 20pcs - $30.02
- WHITE / 45mm x 3mm / 20pcs - $30.18
- WHITE / 35mm x 3mm / 20pcs - $29.97
- WHITE / 38mm x 3mm / 20pcs - $29.45
- WHITE / 13mm x 6mm / 20pcs - $29.73
- WHITE / 14mm x 5mm / 20pcs - $31.02
- WHITE / 22mm x 5mm / 20pcs - $32.05
- WHITE / 32mm x 4mm / 20pcs - $33.08
- WHITE / 35mm x 4mm / 20pcs - $34.08
- WHITE / 18mm x 4mm / 20pcs - $31.19
- WHITE / 27mm x 4mm / 20pcs - $33.28
PRODUCT DETAILS
Premium White Round Silicone Gasket Pads - 20 Pieces Per Pack
Professional-grade flat seal discs engineered for reliable sealing in plumbing, machinery, valves, and industrial equipment. Each pack contains 20 identical white silicone gasket pads precision-cut to your selected diameter and thickness.
Key Features & Benefits
- ✅ 50+ Size Options Available: Diameters from 4mm to 104mm (0.16" to 4.09"), thicknesses from 0.5mm to 5mm (0.02" to 0.20")
- ✅ Heat-Resistant Performance: Stable operation from -40°C to +230°C (-40°F to +446°F)
- ✅ Waterproof & Durable: Solid VMQ silicone rubber withstands moisture, aging, and repeated compression
- ✅ Bulk Value Pack: 20 pieces per order - perfect for multiple repairs or equipment maintenance
- ✅ Precision Manufacturing: CNC-cut or die-cut with smooth edges and consistent thickness (±0.1mm tolerance)
- ✅ Multi-Purpose: Suitable for plumbing gaskets, valve seals, pipe connections, machinery equipment, and laboratory apparatus
Available Sizes - Select Your Perfect Match
All measurements shown as Diameter x Thickness in both metric (mm) and imperial (inches) units. Each order includes 20 pieces of your selected size.
🔹 Extra Small Diameter Gaskets (4-8mm / 0.16"-0.31")
| Size (mm) | Size (inches) | Common Applications |
|---|---|---|
| 4mm x 1mm | 0.16" x 0.04" | Miniature valves, precision instruments |
| 5mm x 0.5mm | 0.20" x 0.02" | Small faucet aerators, micro seals |
| 5mm x 1mm | 0.20" x 0.04" | Laboratory equipment, test tubes |
| 5mm x 1.5mm | 0.20" x 0.06" | Medical devices, small pumps |
| 5mm x 2mm | 0.20" x 0.08" | Thick seal for micro applications |
| 5mm x 2.5mm | 0.20" x 0.10" | High-compression micro seals |
| 5mm x 3mm | 0.20" x 0.12" | Extra-thick miniature gaskets |
| 7mm x 2mm | 0.28" x 0.08" | Small pipe fittings |
| 8mm x 1mm | 0.31" x 0.04" | Sensor housings, connectors |
| 8mm x 2mm | 0.31" x 0.08" | Standard small gaskets |
🔹 Small Diameter Gaskets (10-18mm / 0.39"-0.71")
| Size (mm) | Size (inches) | Common Applications |
|---|---|---|
| 10mm x 1mm | 0.39" x 0.04" | Faucet washers, small valves |
| 10mm x 2mm | 0.39" x 0.08" | Standard household plumbing |
| 10mm x 3mm | 0.39" x 0.12" | Thick compression seals |
| 12mm x 1mm | 0.47" x 0.04" | Half-inch pipe connections |
| 12mm x 2mm | 0.47" x 0.08" | Standard half-inch gaskets |
| 15mm x 1mm | 0.59" x 0.04" | Thin seals for tight spaces |
| 15mm x 2mm | 0.59" x 0.08" | Standard 15mm fittings |
| 16mm x 1mm | 0.63" x 0.04" | Metric pipe fittings |
| 16mm x 2mm | 0.63" x 0.08" | Standard 16mm valves |
| 18mm x 1mm | 0.71" x 0.04" | Three-quarter inch connections |
| 18mm x 2mm | 0.71" x 0.08" | Standard 18mm gaskets |
| 18mm x 3mm | 0.71" x 0.12" | Heavy-duty small seals |
| 18mm x 4mm | 0.71" x 0.16" | Extra-thick compression |
🔹 Medium Diameter Gaskets (20-40mm / 0.79"-1.57")
| Size (mm) | Size (inches) | Common Applications |
|---|---|---|
| 20mm x 1mm | 0.79" x 0.04" | Thin one-inch seals |
| 20mm x 2mm | 0.79" x 0.08" | Standard one-inch gaskets |
| 20mm x 3mm | 0.79" x 0.12" | Thick one-inch seals |
| 22mm x 1.5mm | 0.87" x 0.06" | Specialty metric fittings |
| 22mm x 2mm | 0.87" x 0.08" | 22mm valve gaskets |
| 22mm x 5mm | 0.87" x 0.20" | Heavy compression seals |
| 25mm x 1mm | 0.98" x 0.04" | Thin 25mm gaskets |
| 25mm x 2mm | 0.98" x 0.08" | Standard 25mm seals |
| 25mm x 3mm | 0.98" x 0.12" | Medium compression |
| 27mm x 4mm | 1.06" x 0.16" | Specialty equipment seals |
| 30mm x 1mm | 1.18" x 0.04" | Thin 30mm gaskets |
| 30mm x 2mm | 1.18" x 0.08" | Standard 30mm seals |
| 30mm x 3mm | 1.18" x 0.12" | Thick 30mm gaskets |
| 32mm x 4mm | 1.26" x 0.16" | Industrial equipment |
| 35mm x 1mm | 1.38" x 0.04" | Large thin seals |
| 35mm x 2mm | 1.38" x 0.08" | Standard large gaskets |
| 35mm x 3mm | 1.38" x 0.12" | Thick large seals |
| 35mm x 4mm | 1.38" x 0.16" | Heavy-duty large gaskets |
| 38mm x 2mm | 1.50" x 0.08" | Standard 38mm seals |
| 38mm x 2.5mm | 1.50" x 0.10" | Medium thickness 38mm |
| 38mm x 3mm | 1.50" x 0.12" | Thick 38mm gaskets |
| 40mm x 1mm | 1.57" x 0.04" | Large thin seals |
| 40mm x 2mm | 1.57" x 0.08" | Standard 40mm gaskets |
| 40mm x 3mm | 1.57" x 0.12" | Thick 40mm seals |
🔹 Large Diameter Gaskets (45-100mm / 1.77"-3.94")
| Size (mm) | Size (inches) | Common Applications |
|---|---|---|
| 45mm x 1mm | 1.77" x 0.04" | Large thin seals |
| 45mm x 2mm | 1.77" x 0.08" | Standard 45mm gaskets |
| 45mm x 3mm | 1.77" x 0.12" | Thick 45mm seals |
| 50mm x 1mm | 1.97" x 0.04" | Two-inch thin gaskets |
| 60mm x 1mm | 2.36" x 0.04" | Large thin seals |
| 60mm x 3mm | 2.36" x 0.12" | Large equipment gaskets |
| 80mm x 3mm | 3.15" x 0.12" | Industrial equipment seals |
| 90mm x 2mm | 3.54" x 0.08" | Large machinery gaskets |
| 100mm x 1mm | 3.94" x 0.04" | Extra-large thin seals |
| 100mm x 3mm | 3.94" x 0.12" | Extra-large gaskets |
🔹 Extra Large Diameter Gaskets (104mm / 4.09")
| Size (mm) | Size (inches) | Common Applications |
|---|---|---|
| 104mm x 1mm | 4.09" x 0.04" | Maximum diameter thin seal |
Don't see your exact size? We offer custom cut-to-size services with no minimum order quantity. Contact us at Custominsul@Custominsul.com for custom dimensions.
Technical Specifications
| Property | Specification |
|---|---|
| Material Type | Solid VMQ Silicone Rubber |
| Color | White (Opaque) |
| Shape | Flat Round Circular Disc |
| Quantity Per Pack | 20 Pieces |
| Diameter Range | 4mm to 104mm (0.16" to 4.09") |
| Thickness Range | 0.5mm to 5mm (0.02" to 0.20") |
| Operating Temperature | -40°C to +230°C (-40°F to +446°F) |
| Hardness (Shore A) | 50-60A (Medium Flexibility) |
| Dimensional Tolerance | ±0.1mm (±0.004") |
| Surface Finish | Smooth on both sides |
| Features | Heat-resistant, Waterproof, UV resistant, Non-toxic, Ozone resistant, Low compression set |
| Chemical Resistance | Excellent: Water, weak acids, alkalis Poor: Petroleum oils, fuels, strong solvents |
Common Applications & Use Cases
🏠 Home & Plumbing
- Faucet and valve seals
- Pipe connection gaskets
- Water filter housing seals
- Shower head gaskets
- Tap washer replacements
- Hot water system seals
🏭 Industrial & Manufacturing
- Machinery equipment seals
- Pump housing gaskets
- Heat exchanger seals
- Compressor gaskets
- Flange sealing applications
- Process equipment connections
🔬 Laboratory & Medical
- Laboratory equipment seals
- Container lid gaskets
- Test tube sealing discs
- Instrument calibration pads
- Clean room equipment seals
- Analytical device gaskets
⚙️ Automotive & Machinery
- Electrical housing gaskets
- Sensor protection seals
- Wire grommet inserts
- Vibration dampening pads
- Engine compartment seals
- Hydraulic system gaskets
Why Choose Our White Silicone Gasket Pads?
🔥 Exceptional Heat Resistance
Maintains sealing integrity from freezing temperatures to high heat. Perfect for hot water systems, steam equipment, and industrial machinery experiencing temperature fluctuations.
💧 Superior Waterproof Sealing
Solid silicone construction provides excellent moisture barrier protection. Ideal for plumbing applications, outdoor equipment, and any environment exposed to water or humidity.
📦 Bulk Value Pack
Each order includes 20 identical gaskets - perfect for multiple repairs, equipment maintenance, or keeping spares on hand. Better value than buying individual pieces.
⚡ Long Service Life
Resistant to aging, UV degradation, and ozone exposure. Maintains elasticity and compression resistance for years, reducing maintenance frequency and replacement costs.
✂️ Precision Manufacturing
CNC-cut or die-cut to exact dimensions with smooth edges and consistent thickness. Tight tolerances ensure reliable sealing performance right out of the package.
🎯 Wide Size Selection
Over 50 size combinations available - from miniature 4mm (0.16") seals for precision instruments to large 104mm (4.09") gaskets for industrial equipment.
Installation & Maintenance Tips
✅ Before Installation
- Clean both mating surfaces thoroughly - remove dirt, oil, and old gasket material
- Inspect surfaces for scratches or irregularities that could compromise the seal
- Ensure gasket diameter matches your application (slight interference fit is ideal)
- Check gasket thickness is appropriate for your gap or compression requirements
🔧 During Installation
- Position gasket carefully to ensure center alignment
- Apply even compression - avoid over-tightening which can damage the gasket
- For threaded connections: hand-tighten first, then wrench for final quarter turn
- Allow gasket to settle for 5-10 minutes before final tightening check
- Silicone gaskets typically require 10-30% compression for optimal sealing
🔍 Maintenance Guidelines
- Inspect gaskets periodically for signs of wear, compression set, or cracking
- Replace if you notice leaks, reduced sealing performance, or visible damage
- Keep spare gaskets on hand for emergency repairs (20-piece pack is perfect for this)
- Expected service life: 3-10 years depending on application and operating conditions
Material Comparison - Why Silicone?
| Property | Silicone (VMQ) | NBR (Nitrile) | EPDM | Neoprene |
|---|---|---|---|---|
| Temperature Range | -40°C to +230°C ⭐⭐⭐⭐⭐ |
-40°C to +120°C ⭐⭐⭐ |
-50°C to +150°C ⭐⭐⭐⭐ |
-40°C to +120°C ⭐⭐⭐ |
| Water Resistance | Excellent ⭐⭐⭐⭐⭐ |
Good ⭐⭐⭐ |
Excellent ⭐⭐⭐⭐⭐ |
Good ⭐⭐⭐⭐ |
| Oil Resistance | Poor ⭐ |
Excellent ⭐⭐⭐⭐⭐ |
Poor ⭐ |
Good ⭐⭐⭐ |
| UV/Ozone Resistance | Excellent ⭐⭐⭐⭐⭐ |
Poor ⭐⭐ |
Excellent ⭐⭐⭐⭐⭐ |
Good ⭐⭐⭐ |
| Compression Set | Excellent ⭐⭐⭐⭐⭐ |
Good ⭐⭐⭐ |
Good ⭐⭐⭐⭐ |
Good ⭐⭐⭐ |
| Best For | Water, steam, wide temp range | Oil, fuel, hydraulic fluids | Outdoor, weather exposure | General purpose |
Important Note: Silicone gaskets are NOT suitable for petroleum-based oils, fuels, or strong solvents. For oil-resistant applications, consider our NBR or Viton gasket options.
🛠️ Need Custom Sizes or Shapes?
If our standard 50+ size options don't match your requirements, Custominsul offers comprehensive custom fabrication services with no minimum order quantity:
- ✂️ Cut-to-Size Service - Custom diameters and thicknesses from continuous sheet stock
- ⚙️ CNC Machining Services - High-precision fabrication with ±0.03mm tolerance
- 🔨 CNC Milling - Complex shapes, slots, and custom profiles
- 🔄 CNC Turning - Custom diameter seals and cylindrical gaskets
- 💎 Laser Cutting - Ultra-precise cutting for intricate patterns and special shapes
📧 Email your requirements: Custominsul@Custominsul.com - We'll provide a custom quote within 1 business day. No MOQ required!
Frequently Asked Questions
Q: How many gaskets do I get per order?
A: Each order includes 20 pieces of the same size. This bulk pack provides excellent value and ensures you have spares for future repairs or maintenance.
Q: What's the difference between different thicknesses?
A: Thickness selection depends on your compression gap and sealing requirements:
- 0.5-1mm (0.02"-0.04"): Thin seals for low-compression applications
- 2-3mm (0.08"-0.12"): Standard thickness for most plumbing and general sealing
- 4-5mm (0.16"-0.20"): Thick gaskets for heavy compression and vibration dampening
Q: Can these gaskets be used with petroleum oils or fuels?
A: No. Standard VMQ silicone has poor resistance to petroleum-based products. Silicone will swell and degrade in oil/fuel environments. For oil-resistant applications, we recommend NBR (Nitrile) or Viton (FKM) gaskets from our rubber gasket collection.
Q: What's the maximum temperature these can withstand?
A: Continuous use up to +230°C (+446°F), with intermittent exposure to +250°C (+482°F). They also maintain flexibility down to -40°C (-40°F), making them suitable for both hot and cold applications.
Q: Can I reuse these gaskets?
A: For low-compression applications with careful installation/removal, silicone gaskets can be reused 2-3 times. However, for critical sealing applications (high pressure, temperature, or safety-critical systems), we recommend using new gaskets each time for reliable performance.
Q: Do you offer other colors besides white?
A: This product line is available in white only. For custom colors or special requirements, contact us at Custominsul@Custominsul.com. We can source custom colors for bulk orders (typically 500+ pieces).
Q: How do I choose the right diameter?
A: Measure the opening or pipe outer diameter you need to seal. The gasket diameter should match or be slightly larger (1-2mm) than your measurement for optimal compression fit. Refer to our size tables above for both metric and imperial measurements.
Q: What's your shipping policy?
A: Free standard international shipping is included (delivery in 10-25 business days). For faster delivery, contact us at Custominsul@Custominsul.com to arrange express shipping (4-7 days) with additional fees based on your location.
Why Buy From Custominsul?
🏭 15+ Years Experience
Over 15 years specializing in precision plastic and rubber fabrication for industrial, commercial, and consumer applications worldwide.
🎯 Precision Manufacturing
CNC cutting and die-cutting equipment ensures ±0.1mm dimensional accuracy for reliable sealing performance every time.
📦 Fast Shipping
Large inventory means quick processing. In-stock items ship within 1-2 business days with free standard international shipping.
🔧 Custom Fabrication
Full in-house CNC machining capabilities for custom sizes and shapes. No MOQ required.
💰 Bulk Value
20-piece packs provide better value than buying individual gaskets. Volume discounts available for larger orders.
✅ Quality Guaranteed
Every batch inspected before shipping. Defective products replaced or refunded promptly - your satisfaction is guaranteed.
Ready to Order?
Select your size from the dropdown menu above, add to cart, and receive 20 precision-cut white silicone gasket pads with free standard shipping worldwide.
Need custom dimensions or have questions? Email us at Custominsul@Custominsul.com - Our technical team responds within 1 business day.
✅ Free Worldwide Shipping | 🎯 Precision Cut | 📦 20 Pieces Per Pack | 🔧 15+ Years Experience
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Standard shipping is included in the price of listed standard-size products. For expedited shipping, custom or oversized orders, or a delivery deadline, contact us to confirm available arrangements and any additional charges before ordering. See our shipping policy for details.
Returns and quality problems
Our voluntary return policy covers quality problems; we do not offer change-of-mind returns. This does not limit applicable statutory rights, including withdrawal rights for eligible consumer purchases. For the return process and eligibility, see our refund policy.
If an item is defective, damaged or incorrect, email Custominsul@Custominsul.com with your order number, a description and clear photos. Please contact us before shipping an item back.
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