Custom Silicone Cords for Stable Sizing, Bulk Orders, and Industrial Use
Pandasoft manufactures custom silicone cords for sealing, filling, O-ring splicing, equipment assembly, repair kits, and distributor stock programs.
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MOQ from 500 pcs for existing mold projects
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New custom mold projects from 500-1,000 pcs
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Sample delivery in 6-8 days by express
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Mass production in 2-4 weeks after sample approval
Browse by Cord Profile & Application
Custom silicone cords for sealing, cushioning, and mechanical isolation -- available in round, hollow, D-profile, P-profile, square, and application-specific profiles.
Round Solid Silicone Cord
A dense, flexible silicone cord for general sealing, gap filling, cushioning, and industrial assembly applications.
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Square Silicone Cord
A square-profile silicone cord designed for applications that need wider contact area, stable placement, and improved sealing or cushioning support.
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Silicone Sponge / Foam Cord
A lightweight, compressible silicone cord for cushioning, sealing, vibration reduction, and applications that require softer compression performance.
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High Temperature Silicone Cord
A silicone cord made for high-temperature environments, suitable for heat sealing, industrial equipment, ovens, and thermal insulation applications.
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Metal Detectable Silicone Cord
A detectable silicone cord for food, pharmaceutical, and processing environments where contamination control and equipment safety are important.
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4 Questions to Find the Right
Custom Silicone Cord
No materials science degree required. Work through Pandasoft's four questions to lock in material, structure, hardness, and dimensions -- find the right silicone cord in under three minutes.
Specification selection is simpler than it looks. Answer the four questions below and you'll map your requirements directly to a complete set of concrete specifications.
Solid or Sponge?
Solid vs Sponge -- the first fork in the road
This is the first decision point. It directly determines the sealing mechanism and feel of the cord.
Solid Cord
Dense structure with strong compression resistance, tear resistance, and wear resistance. Ideal for seals under mechanical stress, O-ring fabrication, vibration damping, and general cable/wire protection.
Sponge Cord
Closed-cell interior -- soft, compressible, and lightweight. Seals by closing gaps under low closure force. Best for irregular gap filling, door and cover sealing, thermal insulation, and vibration isolation. Typical hardness: 20-30 Shore A.
What Media or Environment Will the Cord Contact?
Determines the correct material grade
Matching the grade to the contact media and operating conditions is the key to preventing swelling and premature aging.
Standard Silicone (VMQ)
High-temperature, weathering, ozone, and UV resistance. Covers the vast majority of general sealing and outdoor applications.
Fluorosilicone (FVMQ)
All VMQ benefits plus resistance to oils, fuels, and solvents. For automotive, aerospace, and fuel-contact environments.
Food-Grade FDA Silicone
Compliant with FDA 21 CFR 177.2600. Non-toxic and odorless for direct food and beverage contact.
Metal Detectable Silicone
Fragments detectable by metal detectors. Engineered specifically for food processing lines to prevent foreign body contamination.
How Soft or Hard Do You Need It?
Shore A Hardness -- compression fit vs. durability
Hardness governs how well the cord compresses to form a seal and how long it holds up under load. Most silicone cords fall in the Shore A 30-70 range.
Soft
30-40 Shore AEasy to compress with excellent surface conformance. Best for low closure-force sealing and large cross-section O-rings.
Medium
50-60 Shore ABalanced softness and resilience. The most versatile hardness for general sealing and O-ring cord stock -- 60 Shore A is the standard O-ring wire hardness.
Hard
70-80 Shore AResists deformation, wear, and mechanical stress. Suitable for high-pressure sealing or as a lightweight plastic part replacement.
O-Ring / Precision Seal -- or General Routing?
End use determines diameter tolerance and processing
The intended application determines your requirements for diameter precision and downstream processing.
O-Ring / Precision Seal Fabrication
Requires tight diameter tolerances and a smooth surface finish. Cord is vulcanized end-to-end to form custom-diameter O-rings. A structurally sound joint is essential for long-term sealing integrity.
General Routing / Gap Filling
Wider diameter tolerance is acceptable. Supplied by the meter in coils or cut to fixed lengths. No precision joining required.
Available Delivery Formats
Pandasoft Quick Reference Table
Match your application to the recommended specification in seconds.
| Your Application | Recommended Structure | Recommended Material | Suggested Hardness |
|---|---|---|---|
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Pressure Sealing / O-Ring Fabrication
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Solid | VMQ or FVMQ | 50-70 A |
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Door / Cover Low-Pressure Gap Seal
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Sponge | VMQ Sponge | 20-30 A |
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Food & Beverage Equipment Sealing
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Solid
Sponge
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FDA Food-Grade Silicone | 40-60 A |
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Food Line Foreign Body Prevention
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Solid | Metal Detectable Silicone | 50-60 A |
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Oil / Fuel Environment Sealing
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Solid | Fluorosilicone (FVMQ) | 60-70 A |
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Outdoor / High-Temp Vibration Isolation & Routing
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Solid | VMQ High-Temp Grade | 50-70 A |
* Hardness ranges are indicative. Final specification depends on part geometry, compression ratio, and operating conditions. Pandasoft's engineering team can assist with exact grade selection.
Still unsure which spec fits your application?
Send Pandasoft your drawing, sample, or application description. Our engineering team will recommend the right material grade, hardness, and delivery format -- typically within one business day.
Built for Stable Custom Silicone
Cord Production
Pandasoft is a factory-direct B2B silicone products manufacturer with production capacity, engineering support, and quality control systems for custom and bulk orders.
16,000+
sqm Production Space
7+
Years Experience
Extrusion Production
Continuous silicone cord and tube extrusion with precision dimensional control.
Factory Floor
9 production and assembly lines supporting up to 1.2M pcs monthly output.
Mold Machining
CNC and EDM machining with 800+ existing molds and ±0.05 mm tolerance capability.
Quality Inspection
4-step QC process with IQC, IPQC, AOI, and AQL 2.5/4.0 final inspection standards.
Quality Testing for
Custom Industrial Silicone Parts
Every custom industrial silicone order follows controlled quality checks, covering raw material testing, dimensional inspection, hardness testing, mechanical performance tests, in-process inspection, final inspection, and compliance support for industrial applications.
Dimension Inspection
Shore A Hardness Testing
Tensile Strength Testing
Tear Strength Testing
Compression Set Testing
Heat Aging Testing
Color Difference Testing
Visual Defect Inspection
Why Silicone Cord Unit Price Is About
Far More Than Diameter
Same diameter, wildly different price. Pandasoft evaluates every quote against your complete project requirements -- so you can compare cost and quality on a level playing field. Here are the six real drivers behind silicone cord pricing.
Biggest Cost Driver
Material Grade
Standard industrial VMQ is the most economical. Food-grade (FDA), medical-grade (USP Class VI), fluorosilicone (FVMQ), flame-retardant, and metal-detectable silicone are specialty formulations -- more expensive raw materials, stricter production requirements.
Medical-grade silicone requires biocompatibility testing; fluorosilicone carries a premium for its fuel and oil resistance. Specifying the wrong grade either inflates cost unnecessarily or risks failing compliance audits.
Hidden Cost Driver
Hardness & Tolerance
Shore A hardness affects the compound formulation. But tolerance requirements are the real hidden cost lever. Silicone has a natural shrinkage rate of ~2-4%, and the softer the compound, the harder it is to control dimensions.
Tight tolerances on soft cord demand precision tooling and tighter process control. Over-specifying tolerances where they aren't needed adds unnecessary cost. For sealing O-rings and dimension-sensitive applications, tight tolerances are non-negotiable.
Geometry Matters
Diameter & Profile
Diameter affects material volume, but profile shape has an equally significant impact. Solid round cord is the most standard and economical. Square, custom-profile, hollow, and sponge/foam sections require dedicated extrusion dies and more complex process control.
Larger diameters use more material and cost more per meter -- but you can't cross-compare prices across different profiles. A hollow D-profile and a solid round cord of the same diameter have completely different price baselines.
Compliance Cost
Certification Requirements
When FDA, USP Class VI, 3-A, NSF-51, UL, EN45545-2 flame-retardant, or military spec (A-A59588 / AMS) certifications are required, costs rise measurably. These certifications demand stricter raw materials, testing, documentation, and batch traceability.
When comparing quotes, always verify whether the competing supplier's price includes equivalent certification coverage. Comparing a "bare" price against a "certified" price is an apples-to-oranges comparison that can create serious downstream compliance risk.
Value-Added Processing
Fabrication & Delivery Form
Is the cord supplied on reels by the meter, cut to fixed lengths, or vulcanized into spliced O-rings or frame seals? Each step up in fabrication adds processing cost. Extruded cord sold by the meter is the baseline.
Spliced seamless O-rings require additional vulcanized joint processing, and joint quality directly affects sealing reliability -- this is a genuine value-add beyond raw extrusion. Fixed-length cutting also adds labor and waste management costs. Specify only what your application requires.
Economies of Scale
Order Volume & Tooling
Non-standard and custom profiles typically require a dedicated extrusion die -- a one-time tooling investment. The larger the order volume, the more that tooling and setup cost is amortized across units, driving the per-meter price down.
Small prototype runs carry a higher unit price; large production runs reduce it significantly. Quoting a unit price without knowing the order volume is meaningless. Pandasoft's quotes factor in tooling, order quantity, and long-term partnership potential to give you an accurate total cost picture.
What Drives Cost Up -- At a Glance
| Cost Factor | Lower Cost | Higher Cost |
|---|---|---|
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Material Grade
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Industrial VMQ | Medical-grade / Fluorosilicone (FVMQ) / Metal-detectable |
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Hardness & Tolerance
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Standard tolerance | Tight tolerance (especially on soft compounds) |
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Profile Shape
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Solid round | Custom profile / Hollow / Foam / Sponge |
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Certification Requirements
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No special certification | FDA / USP Class VI / Flame-retardant / Military spec |
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Fabrication Form
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Reel supply by the meter | Fixed-length cutting / Spliced O-rings or frame seals |
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Order Volume
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High volume -- cost amortized | Small batch / New tooling required |
Pandasoft's Approach
Comparing per-meter price alone is how projects go wrong.
A lower headline price can mask a lower material grade, wider tolerances, or missing certifications -- all of which create real risk downstream. Pandasoft starts by understanding your complete project requirements: application, media compatibility, certifications, tolerances, volume, and delivery form. Then we give you a comprehensive quote so you can compare cost and quality on the same baseline -- and buy with confidence.
Silicone Cord Options Matched
to Your Application
Different applications require different material, size, color, and packaging choices. Pandasoft helps buyers define the right specification before production.
Dimension 1
Shape / Profile
The most common customization dimension. Beyond standard round profiles, options include square, rectangular, trapezoidal, O-ring, D-shaped, grooved, and fully custom cross-sections produced with dedicated extrusion dies per drawing.
Dimension 2
Structure Type
Solid: Dense, medium-to-high closure force. Default choice for most sealing applications.
Sponge / Foam: Closed-cell structure, very low closure force. Ideal for fragile substrates or low-pressure sealing.
Hollow: Easier compression, reduced material weight.
Co-extruded: Different materials or hardness zones within a single cord profile.
With Insert: Metal or fiber core embedded for enhanced tensile strength and rigidity.
Dimension 3
Size & Tolerance
Diameter typically ranges from approx. 1 mm to 40 mm; larger sizes available on request. Metric and imperial units both supported.
Solid Cord
ISO 3302-1 E1/E2
Sponge Cord
ISO 3302-1 E3
Cut Length
ISO L2 Grade
O-Ring Seals
High Precision
Dimension 4
Hardness / Shore A
Customizable across 20-90 Shore A. Standard working range is 40-80 Shore A, with 60 Shore A as the most common general-purpose value.
Soft Range
20-40 Shore A
Easy compression, conforms to irregular surfaces
Hard Range
70-90 Shore A
Deformation-resistant, high-wear applications
Dimension 5
Grade & Compound
Select the compound matched to your industry and application requirements. Vulcanization process can be specified as platinum-cured or peroxide-cured.
Platinum-Cured
Peroxide-Cured
Dimension 6
Color
Custom color matching by Pantone or RAL reference. Color coding is also commonly used for product line specification identification and differentiation across part families.
Dimension 7
Fabrication & Delivery Form
Coil / Cut-to-Length
Supplied by the meter on coil, or cut to your specified length for direct assembly or kitting.
Vulcanized Splicing
Heat-vulcanized into seamless O-rings or frame seals. The joint must be structurally sound to maintain sealing integrity -- no weak points.
Secondary Operations
Additional finishing available: punching, bonding, surface treatment, and other post-processing operations as required.
Pandasoft Silicone Cord -- Quick Reference
| Customization Dimension | Available Options |
|---|---|
|
01
Shape / Profile
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Round
Square
Rectangular
Trapezoidal
D-Shape
Grooved
Custom Per Drawing
|
|
02
Structure Type
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Solid
Sponge / Foam
Hollow
Co-extruded
With Insert (Metal / Fiber)
|
|
03
Size & Tolerance
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1-40 mm Diameter
Metric & Imperial
ISO 3302-1 E1-E3
High Precision for O-Rings
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04
Hardness
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20-90 Shore A
Common Range: 40-80 Shore A
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05
Material Grade
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Industrial
Food Grade (FDA)
Medical (USP VI)
Fluorosilicone (FVMQ)
Flame Retardant
Metal-Detectable
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|
06
Color
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Pantone / RAL Custom
Clear
Translucent
White / Black
Red / Blue / Green / Yellow
Spec ID Color Coding
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|
07
Fabrication & Delivery
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Coil (by meter)
Cut-to-Length
Vulcanized O-Ring
Frame Seal Splice
Punching / Bonding / Surface Treatment
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Note: All specifications are confirmed during the pre-production review stage. Pandasoft engineering team provides DFM support and sample approval before mass production.
Flexible MOQ, Clear Lead Times, and a Practical Path to Bulk Supply
Pandasoft supports qualified B2B trial orders and stable bulk production -- from specification review and sample confirmation through to repeat supply.
Existing Mold Projects
Start from 500 pcs when your specification matches an existing mold in our library of 800+ tools.
New Custom Mold Projects
MOQ depends on part size, structure, material, and mold requirements. Confirmed during technical review.
Custom Packaging
Custom packaging available from 1,000 pcs when required for retail, OEM, or branded distribution needs.
Bulk Supply Capacity
Supported by 9 production and assembly lines with 500,000-1,200,000 pcs monthly output for stable repeat orders.
Specification and Sample Confirmation
Send size, material requirement, color, quantity, drawing, sample, or application details. Our engineering team will review your specifications and prepare a matched sample for your evaluation.
Mold and Bulk Production
If a new mold is required, mold development usually takes 15-20 days. Mass production begins after sample approval and is typically completed within 2-4 weeks depending on order volume and part complexity.
Start with a practical trial order, confirm the specification, then scale into repeat production with clearer cost control.
Frequently Asked Questions
Questions Before Starting a Custom Silicone Cord Project.
What is the MOQ for custom silicone cords?
Can you support trial orders?
Can you match a specific color?
Can you make food-grade silicone cords?
How long does sampling and production take?
What information should I send for a quotation?
Get a Free Quote for Your Custom Industrial Silicone Parts
Send us your drawing, sample, photo, or technical requirements. Our engineering team will review your project and provide a practical mold feasibility review and factory quote within 12 hours.
- Free Mold Feasibility Review & Quote
- Direct Factory Pricing
- 12-Hour Expert Response
- Direct Factory Support, No Aggressive Follow-Ups
- Free Samples Available Upon Review
Mold Feasibility Review & Factory Quote
Engineer response within 12h.
Free review for your drawing, sample, material, hardness, tolerance, working environment, and project requirements.
