Product Overview
Reliable custom rubber parts for industrial applications
Quick Answer
Colored custom rubber O-ring assortments in different materials are supplied for industrial sealing, OEM assembly, repair kits and distributor inventory. NBR, EPDM, FKM, Silicone, HNBR and CR materials are available. Inner diameter, cross-section, color, Shore A hardness, dimensional tolerance, size quantity, packaging and labeling can be customized.
Colored Custom Rubber O-Ring Assortments — All Materials, Any Color, Any Size, AS568A / ISO 3601 Standard & Custom
Colored custom rubber O-ring assortments are multi-size sealing kits supplied in different elastomer materials for industrial assembly, maintenance and distributor inventory. Materials can include NBR, EPDM, FKM, Silicone, HNBR, CR and application-specific compounds. Inner diameter, cross-section, color coding, hardness, tolerance, quantity per size and packaging can be customized according to buyer requirements.
Product Overview
Colored custom rubber O-ring assortments are designed for buyers who need organized sealing kits with multiple sizes, colors and material grades. Each O-ring is a molded circular elastomer seal with a round cross-section, installed in a groove and compressed between compatible mating components. Different colors can help identify material type, compound grade, size group or application category during storage and assembly. The assortment can be configured for OEM production, MRO repair kits, industrial distributors or equipment service programs. Final selection depends on the groove design, contact media, operating temperature, pressure, motion type, Shore A hardness, dimensional tolerance and packaging method.
Product Specifications
| Attribute | Value |
|---|---|
| Product Name | Colored Custom Rubber O-Ring Assortment |
| Materials Available | NBR, EPDM, FKM (Viton®), VMQ Silicone, HNBR, CR (Neoprene), Fluorosilicone (FVMQ), FFKM, AFLAS, Butyl (IIR), PU (Polyurethane), NR |
| Colors Available | Black, Red, Brown, Green, Blue, White, Yellow, Orange, High-Visibility Green, Translucent, Custom color-match |
| Hardness Range | Shore A 40–90 |
| Standard Series | AS568A Imperial; ISO 3601 Metric; DIN 3771; BS 1806; JIS B2401 |
| CS Range | 0.5 mm to 12.0 mm |
| ID Range | 0.5 mm to 2,000 mm |
| Temperature Range | -60°C to +320°C (compound-dependent) |
| Assortment Kit Options | 225-pc / 15-size; 382-pc / 30-size; 436-pc / 36-size; 1,000-pc+ custom BOM kits |
| Custom Options | Color-match, custom compound formulation, dual-compound kits, labelled compartments, PPAP, FDA, MIL-Spec documentation |
| Certifications | RoHS, REACH; FDA 21 CFR 177.2600; WRAS; USP Class VI; AS9100; MIL-Spec; NSF/61 |
The Industrial Color Coding System — Why Color Matters
In any industrial environment handling multiple O-ring compounds, visual identification before installation is the single most important quality control step. An O-ring that appears dimensionally identical in two different compounds — NBR and EPDM, for example — will perform correctly in one application and fail immediately in the other. The industry-standard color coding system provides instant, error-free compound identification without requiring chemical testing or label reading at the point of installation.
Complete Color-Material-Application Reference Master Table
| O-Ring Color | Primary Compound(s) | Temp Range | Key Chemical Resistance | Primary Applications |
|---|---|---|---|---|
| ⚫ Black | NBR (Nitrile) | -40°C to +100°C | Petroleum oil, hydraulic fluid, diesel, fuel | Hydraulics, pneumatics, fuel systems, gearboxes |
| ⚫ Black | EPDM | -50°C to +150°C | Water, steam, glycol, ozone | HVAC, water treatment, outdoor piping |
| ⚫ Black | FKM Standard | -20°C to +200°C | Chemicals, solvents, fuels | Chemical plant, offshore (black FKM variant) |
| ⚫ Black | FFKM | -20°C to +320°C | Near-universal | Semiconductor, pharma extreme service |
| ⚫ Black | CR (Neoprene) | -40°C to +120°C | Moderate oil, ozone, UV | Marine, refrigeration, outdoor electrical |
| 🔴 Red / Brick Red | VMQ Silicone | -60°C to +250°C | Water, mild chemicals; FDA compliant | Food processing, pharma, automotive, HVAC |
| 🟤 Brown | FKM (Viton®) Standard | -20°C to +200°C | Broadest chemical spectrum; oil, fuel, solvents | Chemical, oil & gas, aerospace, automotive |
| 🟢 Green | FKM GLT / GFLT (Low-Temp) | -40°C to +200°C | Full FKM chemical resistance + cold flexibility | Cold climate, solar thermal, Arctic O&G |
| 🟢 Green | HNBR | -40°C to +150°C | Hot oil, ozone, oilfield chemicals | Oilfield, automotive, hot oil systems |
| 🔵 Blue | FVMQ (Fluorosilicone) | -65°C to +200°C | Fuel, oil AND wide temp range | Aerospace fuel systems, MIL-spec |
| 🔵 Blue | VMQ Metal-Detectable | -60°C to +200°C | Food contact; X-ray & metal detector detectable | Food processing contamination control |
| ⚪ White | VMQ Silicone (FDA) | -60°C to +250°C | Zero-pigment; pharma-grade | Pharmaceutical direct contact, medical devices |
| ⚪ White | EPDM (FDA) | -50°C to +150°C | Water, steam; FDA compliant | Food/beverage water contact |
| ⚪ White | NBR (FDA) | -40°C to +100°C | Oil, grease; FDA compliant | Dairy, food-grade oil/grease contact |
| ⚪ White / Opaque | PTFE-Encapsulated | -60°C to +200°C | Near-universal chemical inertness | Chemical process, pharmaceutical |
| 🟡 Yellow | NBR (High-Visibility) | -40°C to +100°C | Oil, hydraulic fluid | Safety-color-coded hydraulic maintenance |
| 🟡 Yellow | FKM (High-Visibility) | -20°C to +200°C | Chemical, fuel | Safety-coded chemical plant maintenance |
| 🟠 Orange | VMQ Silicone | -60°C to +250°C | High temp; custom ID color | OEM proprietary color coding |
| 🟢 Hi-Vis Green | NBR / FKM | Compound-dependent | Compound-dependent | High-visibility safety maintenance kits |
| 🔵 Clear / Translucent | PU (Polyurethane) | -35°C to +80°C | High-pressure hydraulic, abrasion | High-pressure hydraulic cylinders |
Complete Material Compound Guide
⚫ NBR — Nitrile Butadiene Rubber (Black Standard / White FDA / Yellow Hi-Vis)
The world’s highest-volume O-ring compound. Outstanding petroleum oil, mineral hydraulic fluid, diesel, grease, and fuel resistance at the lowest cost of any performance rubber compound.
| Property | Value |
|---|---|
| Temperature | -40°C to +100°C |
| Oil / hydraulic fluid | ✅ Excellent |
| Water | ✅ Good |
| Ozone / UV | ❌ Poor — indoor only |
| Standard color | Black |
| FDA color | White |
| Hi-visibility color | Yellow |
| Standard hardness | Shore A 70 |
⚫ EPDM — Ethylene Propylene Diene Monomer (Black Standard / White FDA)
Universal compound for water, steam, HVAC, and outdoor service. WRAS-approved and FDA-compliant grades available in white for potable water and food contact applications.
| Property | Value |
|---|---|
| Temperature | -50°C to +150°C |
| Water / steam | ✅ Excellent |
| Ozone / UV | ✅ Excellent |
| Oil | ❌ Poor |
| Standard color | Black |
| FDA/WRAS color | White |
| Standard hardness | Shore A 70 |
🔴 VMQ Silicone — Vinyl Methyl Siloxane (Red Industrial / White FDA / Blue Metal-Detectable)
Widest operating temperature range of any standard O-ring compound. Red is the universal industrial identification color; white/translucent for pharma direct contact; blue metal-detectable for food processing contamination control.
| Property | Value |
|---|---|
| Temperature | -60°C to +250°C |
| FDA 21 CFR 177.2600 | ✅ Available |
| Oil | ❌ Poor |
| CIP/SIP resistance | ✅ Excellent |
| Industrial color | Red |
| FDA / pharma color | White / Translucent |
| Metal-detectable color | Blue |
| Standard hardness | Shore A 70 |
🟤 FKM — Fluorocarbon Elastomer / Viton® (Brown Standard / White FDA)
Broadest chemical resistance of any standard O-ring elastomer. Brown is the universal identification color for standard FKM 75A. White/off-white FDA-grade FKM for food and pharmaceutical applications per 3-A Sanitary Standards.
| Property | Value |
|---|---|
| Temperature | -20°C to +200°C |
| Chemical resistance | Outstanding — broadest spectrum |
| Oil / fuel / solvents | ✅ Excellent |
| Standard color | Brown |
| FDA color | Brown / White |
| Standard hardness | Shore A 75 |
🟢 FKM GLT / GFLT — Low-Temperature Fluorocarbon (Green)
Extended low-temperature FKM retaining full chemical resistance. Green is the universal identification color distinguishing low-temp FKM from standard brown FKM.
| Property | Value |
|---|---|
| Temperature (GLT) | -40°C to +200°C |
| Temperature (GFLT) | -55°C to +200°C |
| Chemical resistance | Same as standard FKM |
| Color | Green |
| Hardness | Shore A 70 |
🟢 HNBR — Hydrogenated Nitrile (Green)
Hot oil service compound extending NBR performance to +150°C. Green color shared with low-temp FKM — distinguish by compound designation on packaging.
| Property | Value |
|---|---|
| Temperature | -40°C to +150°C |
| Oil resistance | Excellent |
| Ozone resistance | Good |
| Color | Green |
| Hardness | Shore A 70–80 |
🔵 FVMQ — Fluorosilicone (Blue)
The aerospace compound combining silicone’s wide temperature range (-65°C to +200°C) with FKM-equivalent fuel and oil resistance. Blue is the standard identification color. Specified to MIL-R-25988 for aerospace fuel system O-rings.
| Property | Value |
|---|---|
| Temperature | -65°C to +200°C |
| Fuel / oil resistance | ✅ Good |
| Wide temp flexibility | ✅ Excellent |
| MIL-Spec | MIL-R-25988 |
| Color | Blue |
| Hardness | Shore A 60–70 |
⚪ PTFE-Encapsulated O-Ring (White / Silver)
Solid FKM or VMQ silicone O-ring core encapsulated in a seamless PTFE jacket. Combines PTFE’s near-universal chemical inertness and non-stick surface with the elastomeric spring-back of the rubber core. White or silver appearance.
| Property | Value |
|---|---|
| Chemical resistance | Near-universal (PTFE jacket) |
| Temperature | -60°C to +200°C |
| FDA compliant | ✅ Yes |
| Appearance | White / Silver |
| Applications | Chemical process, pharmaceutical, food |
🔵 Clear / Transparent — PU (Polyurethane)
The compound for very high-pressure dynamic reciprocating sealing. Clear/translucent appearance. PU has the highest abrasion resistance and pressure capability of any standard O-ring material — rated to 400+ bar with back-up rings.
| Property | Value |
|---|---|
| Temperature | -35°C to +80°C |
| Abrasion resistance | Outstanding |
| Max pressure | 400+ bar (with back-up rings) |
| Oil resistance | Good |
| Color | Clear / Translucent |
⚫ FFKM — Perfluoroelastomer (Black / Yellow-Green)
The ultimate performance O-ring compound — near-universal chemical resistance and continuous service to +320°C.
| Property | Value |
|---|---|
| Temperature | -20°C to +320°C |
| Chemical resistance | Near-universal |
| Color | Black / Yellow-Green |
| Applications | Semiconductor, extreme pharma, refinery |
| Cost | Very High |
Custom Color Options — Full Capability
Any O-ring in any color is achievable through pigment compounding. Common reasons for custom color specification:
| Custom Color Application | Color Specified | Compound | Purpose |
|---|---|---|---|
| OEM Assembly Error-Proofing | Unique OEM color | Any | Poka-yoke — wrong part immediately visible |
| Multi-Circuit System Coding | Circuit-specific color | Any | Identify which O-ring belongs to which system |
| Safety / High-Visibility | Hi-Vis Yellow/Green/Orange | NBR / FKM | Maintenance safety — O-ring visible after removal |
| Food Metal-Detectable | Blue | VMQ / EPDM | X-ray and metal detector detectable |
| Regulatory ID | Compound-standard colors | All | Global industry standard color codes |
| Branding | Brand color | VMQ / NBR / EPDM | Branded replacement parts packaging |
| Grade Differentiation | Multiple shades | FKM | Distinguish GLT (green) from standard (brown) |
Custom colors available in all standard compounds. Minimum order for custom color: typically 500–1,000 pieces per size depending on compound; consult for specific requirements.
FDA & Food-Grade Colored O-Ring Assortments
| Color | Compound | Standard | Key Compliance |
|---|---|---|---|
| White | VMQ Silicone | FDA grade | FDA 21 CFR 177.2600; NSF-51; USP Class VI |
| White | EPDM | FDA grade | FDA 21 CFR 177.2600; 3-A Sanitary |
| White | NBR | FDA grade | FDA 21 CFR 177.2600; dairy/egg contact |
| White | FKM | FDA grade | FDA 21 CFR 177.2600; 3-A Sanitary |
| Blue | VMQ Silicone | Metal-detectable | X-ray detectable; metal detector detectable |
| Red | VMQ Silicone | Industrial FDA | FDA 21 CFR 177.2600 standard red grade |
Application Market — Colored O-Ring Assortment by Industry
Hydraulic & Pneumatic Equipment Maintenance
Standard black NBR 225-pc to 1,560-pc AS568A kits cover the complete range of hydraulic cylinder, valve, pump, and fitting O-ring maintenance requirements. Multi-compound kits adding brown FKM cover synthetic hydraulic fluid systems and high-temperature service.
Chemical Process Plants
Brown FKM 436-piece kit provides coverage for the majority of chemical plant O-ring maintenance requirements. 5-compound master kits (NBR + EPDM + FKM + HNBR + VMQ) provide full plant maintenance coverage from a single kit. Color coding enables immediate compound verification before installation in safety-critical chemical plant O-ring positions.
Food & Beverage Processing
White FDA-grade multi-compound kits — VMQ, EPDM, and FKM — for all processing equipment O-ring maintenance. Blue metal-detectable VMQ for food contact points where HACCP contamination control mandates detectable components. Complete FDA documentation supplied with every kit.
Automotive OEM & Aftermarket
Color-coded OEM production kits with proprietary compound colors for error-proofing on assembly lines. Aftermarket service kits combining black NBR (general), brown FKM (fuel systems), and green HNBR (high-temp oil systems) cover the complete vehicle O-ring maintenance requirement. PPAP Level 3 documentation for OEM supply programs.
Aerospace & Defense
Blue FVMQ kits for fuel system O-ring maintenance to MIL-R-25988. Green FKM GFLT kits for cold-climate aircraft fuel and hydraulic system O-rings to AMS7410. AS9100-certified supply with full material traceability and first-article inspection reports.
HVAC & Building Services
Black EPDM kits for complete HVAC water system O-ring maintenance — pipe fittings, valve bodies, pump seals, instrument connections. Mixed black EPDM + brown FKM kits for facilities with both water and oil systems
Compound Selection Quick-Reference
| If the system contains… | Specify this color / compound |
|---|---|
| Mineral oil, hydraulic fluid, diesel | ⚫ Black NBR |
| Water, steam, glycol, HVAC service | ⚫ Black EPDM |
| Aromatic solvents, chemicals, hot oil >+100°C | 🟤 Brown FKM |
| Cold climate + chemical/oil service (<-20°C) | 🟢 Green FKM GLT |
| Hot oil +100°C to +150°C, oilfield | 🟢 Green HNBR |
| High temp + FDA food/pharma contact | 🔴 Red VMQ Silicone |
| Pharma direct contact, max purity | ⚪ White VMQ or EPDM |
| Food processing — metal detectable required | 🔵 Blue VMQ Silicone |
| Aerospace fuel + wide temp range | 🔵 Blue FVMQ |
| High pressure dynamic (>100 bar) | 🔵 Clear PU |
| Extreme chemical + temperature (>+200°C) | ⚫ Black / Yellow FFKM |
Quality & Compliance
| Standard | Status |
|---|---|
| AS568A dimensional | ✅ Full range all compounds |
| ISO 3601 dimensional | ✅ Full metric range all compounds |
| FDA 21 CFR 177.2600 | ✅ VMQ, EPDM, NBR, FKM available |
| 3-A Sanitary Standards | ✅ Available for food-grade compounds |
| USP Class VI | ✅ VMQ available |
| NSF/51 & NSF/61 | ✅ VMQ and EPDM available |
| WRAS Approval | ✅ EPDM available |
| MIL-R-25988 (FVMQ) | ✅ Blue fluorosilicone |
| AMS7410 (GFLT FKM) | ✅ Green low-temp FKM |
| AS9100 Rev D | ✅ Aerospace supply |
| PPAP Level 3 | ✅ Automotive OEM |
| RoHS / REACH | ✅ All standard compounds |
| EN 10204 Type 3.1 | ✅ Full material certificate on request |
FAQ
What are colored custom rubber O-ring assortments used for?
Colored custom rubber O-ring assortments are used when multiple sealing sizes, materials or application groups must be organized for industrial assembly, maintenance, repair or distributor supply. The O-rings are installed in grooves and compressed between compatible mating components to help reduce leakage.
Why are O-rings supplied in different colors?
Different colors can help identify material type, compound grade, size group or application category during storage, picking and assembly. Color coding can reduce material mix-up, but critical applications should still verify the compound, hardness, size and batch documentation before installation.
Which rubber materials can be included in one custom assortment?
A custom assortment can include NBR, EPDM, FKM, Silicone, HNBR, CR or application-specific rubber compounds. The material combination should be selected according to contact media, operating temperature, pressure, motion type, chemical compatibility and buyer packaging requirements.
Can the size list and packaging be customized?
Yes. The assortment can be customized by inner diameter, cross-section, material, color, quantity per size, label format and packaging type. Options include bulk bags, size-sorted bags, compartment boxes, maintenance kits, mixed-material kits and OEM private-label packaging.
How should buyers select the correct O-ring material?
Material selection depends on the actual contact media and working environment. NBR can be reviewed for oil and hydraulic fluids. EPDM is suitable for water and weather exposure. Silicone can support broad temperature flexibility. FKM can be evaluated for fuels, elevated temperatures and selected chemical media.
Are samples available before bulk assortment production?
Samples are available upon request. Sample planning depends on O-ring size, material, color, Shore A hardness, tolerance, tooling status and packaging format. Please provide a size list, drawing or physical sample so the colored custom rubber O-ring assortment can be reviewed accurately.
Request a Custom Quote
Send your colored custom rubber O-ring assortment size list, drawing, standard reference or physical sample for technical review. Please include ID, cross-section, material, color, hardness, quantity per size, contact media, temperature range, pressure, packaging format and documentation requirements.
