Zhejiang Jiacheng New Material Co., Ltd. is one of the leading manufacturers and suppliers of colorful custom fkm o-ring in China, also supports customized service. Welcome to wholesale bulk high quality colorful custom fkm o-ring in stock here from our factory. If you have any enquiry about quotation and free sample, please feel free to email us.

Manufacturer of Custom FKM O-Rings: Accurately Colored Viton & Molded Rubber Seals

Precision Color Matching: Accurate color formulation using Pantone and RAL color systems (Red, Green, Blue, Brown, Yellow, White, and Custom).
Tooling Cost Savings: There are more than 10,000 mold sets available, and there is no tooling charge for both standard and popular non-standard sizes.
Material Integrity: Completely pure Viton®/FKM polymer compound that complies with FDA, NSF61, REACH, and RoHS regulations.
Engineering support includes quick prototyping prior to mass production and complete DFM (Design for Manufacturability) research.

Obtain a Free DFM Analysis and Engineering Quote for Your Custom Rubber Seals

Do you require non-standard rubber seals or custom-molded colored FKM O-rings? Send us your technical specifications right now.
How It Operates:

Upload your 2D and 3D CAD designs (supported formats include.STEP,.STP,.IGS,.DWG,.DXF, and.PDF).
Indicate the working conditions (Hardness Shore A, Fluid/Chemical exposure, and Temperature).
Select your personalized Pantone or RAL color.
Within 12 to 24 hours, our top sealing engineers will examine your files and submit a comprehensive quote along with engineering comments.

Submit CAD Drawings for Instant Free Quote

(100% Confidentiality Promised | NDA Available Upon Request)

Strictly Standardized B2B Customization Process (Design to Mass Production)

In order to guaranty flawless dimensional tolerances, precise color consistency, and batch-to-batch repeatability for high-performance applications, SJK, a specialized Custom FKM O-Ring Manufacturer, follows a rigorous 4-stage standardized manufacturing lifecycle.

Stage 1: DFM & Technical Design Verification

For shrinkage rates, mold flash control, parting line location, and lip design, our technical staff assesses your 2D/3D CAD models (.STEP,.IGS,.PDF).
To maximize sealing performance and lower manufacturing costs, we offer quick Design for Manufacturability (DFM) recommendations.

Stage 2: Rapid Tooling & Sample Prototyping

In-House Mold Shop: Quick mold development is guarantyd by precise CNC mold processing (5–10 business days for specialized tools).
Free Tooling Option: To avoid paying tooling expenses entirely, look thru our database of more than 10,000 ready-to-use molds.
Dimension inspection reports accompany First Article Inspection (FAI) samples.

Stage 3: Color Validation and Advanced Material Testing

FKM compound formulation that is tailored to your hardness (50–90 Shore A), chemical, and thermal requirements.
To guaranty adherence to designated RAL/Pantone codes, color spectrum testing is done with accurate spectrophotometers.
thorough testing that includes fluid resistance, compression set, elongation at break, and tensile strength.

Stage 4: Automated Production and Quality Control

Zero internal void flaws are guarantyd using liquid silicone/rubber injection systems and vacuum compression molding.
Prior to shipment, 100% Automatic Optical Inspection (AOI) sorting equipment confirm important dimensions and surface integrity.
Every delivery batch comes with material test certifications (COA) for complete traceability.

More Than 10,000 Ready-Made Molds With Precise Pantone/RAL Color Formulation

1. Huge In-House Mold Stock (Zero Tooling Fee Advantage)
The initial tooling costs for creating custom molded rubber seals is frequently rather significant. Over 10,000 standard (AS568, ISO 3601, JIS B2401, DIN 3771) and non-standard O-ring mold sets are kept up to date in SJK's active collection.
Our staff evaluates our current inventory to determine whether a mold suits your dimensions before billing for new tooling, saving you thousands of dollars in upfront tooling expenditure and reducing lead times by weeks.

2. FKM/Viton® Industrial-Grade Color Matching System
Due to high-temperature vulcanization procedures and dark curing chemicals, traditional FKM/Viton® compounds are intrinsically difficult to colorize. In order to provide vivid, reliable Colored Viton Seals without compromising physical performance, SJK has created exclusive fluororubber color-pigment stabilization technology.

Pantone Matching System (PMS) or RAL Classic color codes can be specified for precise color standards.
Color Functions: Color-coded FKM O-rings can distinguish between different material durometers (e.g., 70 Shore A Blue vs. 80 Shore A Green), enhance brand recognition, and minimize assembly errors on multi-line manufacturing floors.
Zero Discoloration: In operating conditions as high as 200°C to 250°C, high-temperature resistant organic pigments guaranty no fading, bleed-through, or degradation.

Technical Details on Custom Molded Rubber Seals

Specification Item	Details
Primary Material	100% Genuine FKM / Fluorocarbon / Viton® Polymer
Color Options	Black, Brown, Green, Red, Blue, Yellow, Orange, White, Gray, or Custom RAL / Pantone Match
Hardness Range	50 to 90 Shore A (±5 Shore A tolerance)
Temperature Range	Standard FKM: -20°C to +200°C (-4°F to +392°F) \| Special Low-Temp FKM: -40°C to +230°C
Supported CAD Formats	.STEP, .STP, .IGS, .X_T, .DWG, .DXF, .PDF
Certifications	ISO9001:2015, IATF 16949, RoHS 3.0, REACH SVHC, FDA 21 CFR 177.2600 (Food Grade available)
Chemical Resistance	Excellent resistance to petroleum oils, synthetic lubricants, acids, fuels, aromatic hydrocarbons, and high vacuum environments.
Production Capacity	5,000,000 pcs / month

Tailored FKM Sealing Options for Vital Industries

As a skilled producer of custom-molded rubber seals, SJK creates colored Viton seals that are suited to certain industrial needs:

Automotive & Powertrain Systems: Fuel fast connections, turbocharger hoses, oil sensors, and injector seals that need to be highly resistant to harsh biofuels and intense engine heat require custom color-coded FKM seals.
High-purity, low-outgassing colored FKM O-rings designed for wafer handling systems and plasma processing chambers are used in semiconductor and vacuum equipment.
Custom cross-section molded rubber seals made to resist strong acids, aromatic solvents, and high-pressure valves are used in chemical and process engineering.
FDA-compliant white, blue, or red FKM O-rings for sanitary fittings, filling pumps, and process lines needing clean-in-place (CIP) and steam-in-place (SIP) durability are available for the food, beverage, and pharmaceutical industries.

Custom FKM O-Rings: Frequently Asked Questions (FAQ)

FAQ

Q1: Can SJK match my precise custom color specifications for FKM and Viton O-rings?

We create unique color compounds that correspond to traditional Pantone or RAL color codes. Our lab uses optical spectrophotometers to verify color fidelity, whether you require branded esthetic seals or color-coded seals for assembly line safety.

Q2: For custom-molded rubber seals, what is your Minimum Order Quantity (MOQ)?

A: MOQs can be as low as 100–500 pieces for typical sizes where we already have molds (from our database of over 10,000 molds). MOQ is determined by seal dimensions and compound requirements for totally custom molded seals that need new tooling. For adaptable prototype-to-mass-production batch possibilities, get in touch with our engineers.

Q3: How long does it take to receive personalized samples and a quote?

A: After obtaining your 2D/3D CAD files, engineering quotes are sent out within 12 to 24 hours. Prototype samples and tooling are usually finished in 7–10 business days.

Q4: Does SJK protect my exclusive product design?

A: Definitely. All client designs, CAD data, and technical specifications are handled with the utmost confidentiality. Before accepting any project files, we are ready to sign a standard Non-Disclosure Agreement (NDA).

Get a Quote

Get in touch with SJK right now to talk about your pressing sealing issues!

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