Material selection
Choose silicone for temperature extremes and weathering, EPDM for economical outdoor water sealing, NBR for oil resistance and FKM for harsher chemicals.
DRAWING-BASED CUSTOM PARTS
Custom Silicone Rubber Washers
Flexible silicone washer rings that seal, cushion and electrically isolate hardware in hot, cold and weather-exposed assemblies.
Custom die-cut or molded silicone rubber washers with material, durometer and geometry selected for the joint environment.
Engineered Custom Silicone Rubber Washers
Silicone washers add a resilient interface beneath fasteners, fittings and covers. They can be flat, stepped or molded with lips depending on whether the priority is sealing, damping, electrical isolation or protecting a finished surface.
Material approach
Silicone retains flexibility across a wide temperature range and has strong resistance to UV, ozone and outdoor aging.
Key features
- Wide temperature range
- flexible compression seal
- UV and ozone resistance
- custom ID/OD
- die-cut or molded construction.
Custom Specifications
Typical values for reference only. Final material grade, tolerance and dimensional capability are confirmed after drawing review.
| Material | Silicone rubber |
|---|---|
| Thickness range | 0.3-12 mm |
| Typical thickness | 1-3 mm |
| Size range | Inner diameter 1-150 mm; outer diameter 3-300 mm |
| Temperature range | -60 to 230 C |
| Hardness range | Shore A 20-80 |
| Tolerance | Typically +/-0.15 mm die-cut profile; molded dimensions by drawing |
| Standards | FDA and LFGB food-contact grades, UL 94 options and RoHS/REACH documentation by compound. |
MATERIAL SELECTION
Silicone Rubber Washers Material Comparison
Use this as a starting point only; the selected grade and construction are confirmed against the drawing and application.
| Material | Primary strength | Selection focus | Best fit |
|---|---|---|---|
| Solid silicone | Silicone retains flexibility across a wide temperature range and has strong resistance to UV, ozone and outdoor aging. | Choose silicone for temperature extremes and weathering, EPDM for economical outdoor water sealing, NBR for oil resistance and FKM for harsher chemicals. | High-temperature appliances, lighting, outdoor fixtures, electronics, food equipment, laboratory hardware and vibration-sensitive fasteners. |
| silicone sponge | Elastic recovery, dielectric behavior, low-temperature flexibility, compression set and tear strength depend on compound and hardness. | Choose silicone for temperature extremes and weathering, EPDM for economical outdoor water sealing, NBR for oil resistance and FKM for harsher chemicals. | High-temperature appliances, lighting, outdoor fixtures, electronics, food equipment, laboratory hardware and vibration-sensitive fasteners. |
| EPDM | Elastic recovery, dielectric behavior, low-temperature flexibility, compression set and tear strength depend on compound and hardness. | Choose silicone for temperature extremes and weathering, EPDM for economical outdoor water sealing, NBR for oil resistance and FKM for harsher chemicals. | High-temperature appliances, lighting, outdoor fixtures, electronics, food equipment, laboratory hardware and vibration-sensitive fasteners. |
PRODUCT EXAMPLES
Custom Part Gallery
CONVERTING OPTIONS
Manufacturing & Finish Options
Match washer hardness and thickness to the clamp load; too-soft washers can extrude while too-hard washers may not seal uneven surfaces.
Custom Die Cutting
A repeatable route for defined profiles after tooling and project review.
Custom Die Cutting →CNC Knife Cutting
A flexible route for complex profiles and variable project volumes.
CNC Knife Cutting →Custom Gasket Prototyping
Sample parts for fit, material and assembly validation before production.
Custom Gasket Prototyping →DESIGN REVIEW
Engineering Guide
Practical points to include when selecting foam and preparing a drawing for review.
Geometry and thickness
Keep enough radial width around the hole to spread load and use a backing washer when a small fastener head could cut into the elastomer.
Assembly performance
For a sealing washer, design around controlled compression and verify the actual mating-surface finish, fastener torque and thermal cycle.
Production route
Match washer hardness and thickness to the clamp load; too-soft washers can extrude while too-hard washers may not seal uneven surfaces.
Applications / Where It Fits
Custom die-cut or molded silicone rubber washers with material, durometer and geometry selected for the joint environment. The final specification is established around the drawing and operating requirements.
When This Part May Not Be the Best Choice
Fuel and petroleum-oil exposure, high-pressure metal-to-metal flange joints, or highly abrasive moving interfaces.
Alternative parts to consider
Custom Die-Cut Silicone GasketsCustom Molded Silicone SealsEPDM Foam WashersPROJECT DELIVERY
Manufacturing Capabilities
Available options are confirmed against the selected material, drawing and order requirements.
| Capability | Options |
|---|---|
| Manufacturing process | Flatbed die cutting, waterjet cutting, compression molding and liquid silicone molding |
| Adhesive options | None, acrylic PSA, silicone PSA and selective placement adhesive. |
| Surface options | Smooth, matte, textured, clear, translucent and colour-matched surfaces. |
| Custom options | ID, OD, thickness, cross-section, durometer, colour, silicone grade, adhesive and packaging. |
| Standards | FDA and LFGB food-contact grades, UL 94 options and RoHS/REACH documentation by compound. |
Drawing Requirements
Recommended drawing formats
Please include
- fastener size
- required sealing land
- clamp load
- temperature range and material exposure
For a precise custom silicone rubber washers quotation, provide fastener size, required sealing land, clamp load, temperature range and material exposure.
Frequently Asked Questions
Can silicone washers be used outdoors?
Yes. Silicone resists UV, ozone and weathering well, making it suitable for many outdoor assemblies.
Are silicone washers electrically insulating?
Standard silicone is electrically insulating; confirm the required dielectric performance for the selected compound and thickness.
Can you mold a washer with a sealing lip?
Yes. Molding can add lips, steps and captive geometry that flat die cutting cannot create.
Which rubber should I use for oil exposure?
NBR or FKM is usually better suited than standard silicone for petroleum-oil exposure.
What should a drawing include for custom silicone rubber washers?
Include fastener size, required sealing land, clamp load, temperature range and material exposure.
Can custom silicone rubber washers be supplied for production assembly?
Yes. Match washer hardness and thickness to the clamp load; too-soft washers can extrude while too-hard washers may not seal uneven surfaces. Delivery format, liner configuration and packaging are specified for the assembly workflow.
How is the right custom silicone rubber washers construction selected?
Choose silicone for temperature extremes and weathering, EPDM for economical outdoor water sealing, NBR for oil resistance and FKM for harsher chemicals. The drawing and operating conditions establish the final construction.
CONTINUE YOUR RESEARCH
Related Parts, Materials & Capabilities
DRAWING-BASED MANUFACTURING
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