Rubber Process Oil (RPO) — Supplier from Turkey & UAE
Aromatic extender oil for tyre, belting & industrial rubber compounding. Light and Heavy viscosity grades, full COA & MSDS, shipped to Africa, Asia and the Middle East.
| 📐 Aromatic / Naphthenic base | 🚢 FOB Iskenderun & Mersin | 📋 Full COA & MSDS | 🌍 Africa · Asia · Middle East |
| 20–50Viscosity @100°C (cSt) | 200–240°CFlash Point | 2Grades — Light & Heavy | 2Loading Ports |
What Is Rubber Process Oil?
Rubber Process Oil (RPO) is an aromatic-rich fraction obtained from the vacuum distillation of crude petroleum, known in refining terms as Raffinate. Its mixed-ring carbon structure and double-bond content give it strong solvency and compatibility with rubber polymers, which is why it is used industry-wide as a processing aid and extender oil in rubber compounding.
During compounding, RPO reduces the viscosity of raw rubber, improves dispersion of carbon black and other fillers, and adds flexibility to the vulcanized product. Heavy RPO in particular is developed as an extender oil for styrene-butadiene rubber (SBR) production — dark in colour, with strong compatibility across most rubber types, used where colour is not a critical parameter, such as tyres, conveyor belting, and battery cases.
Zumrut International Kimya sources RPO from major Middle Eastern production bases and ships FOB from its Turkey terminals.
Light Rubber Process Oil — Technical Specifications
| Property | Test Method | Unit | Specification |
|---|---|---|---|
| Kinematic Viscosity @ 100°C | ASTM D-445 | cSt | 20–35 |
| Flash Point | ASTM D-93 | °C | 200–230 |
| Density @ 15°C | ASTM D-1298 | g/cm³ | 1.01 |
| Refractive Index | ASTM D-1218 | — | 1.55 |
| Oil Type | — | — | Aromatic |
| Colour | Visual | — | Dark brown |
Heavy Rubber Process Oil — Technical Specifications
| Property | Test Method | Unit | Grade 1 | Grade 2 |
|---|---|---|---|---|
| Kinematic Viscosity @ 100°C | ASTM D-7042 | cSt | 30–40 | 40–50 |
| Flash Point | ASTM D-92 | °C | 230 | 240 |
| Aniline Point | ASTM D-611 | °C | Max 45 | Max 40 |
| Pour Point | ASTM D-97 | °C | Max +36 | Max +27 |
| VGC (typical) | ASTM D-2501 | — | 0.96 | 0.97 |
| Density @ 15.6°C | ASTM D-4052 | kg/m³ | 1,010 | 1,020 |
| Carbon Type — CA | ASTM D-3238 | % | — | 35–45 |
| Carbon Type — CN | 20–25 | |||
| Carbon Type — CP | 30–40 |
Carbon type distribution (CA/CN/CP) per ASTM D-3238 is confirmed for Grade 2 (40–50 cSt) from our official Technical Data Sheet; Grade 1 carbon-type breakdown available on request.
Properties Explained
🔬 Aromatic Content — Solvency & CompatibilityRPO’s aromatic-rich structure gives it high solvency power, meaning it blends readily with rubber polymers and disperses carbon black and other fillers evenly through the compound. |
🌡️ Viscosity — ProcessabilityLight RPO (20–35 cSt @100°C) is used where lower compound viscosity and easier flow are needed. Heavy RPO (30–50 cSt @100°C) carries more body and is preferred as an SBR extender oil. |
📏 Aniline Point — Compatibility IndicatorThe aniline point of Heavy RPO (max 40–45°C) indicates aromaticity and solvency — the lower the aniline point, the more aromatic and rubber-compatible the oil. |
⚡ Flash Point & Pour Point — HandlingFlash points of 200–240°C give a safe handling margin during storage and compounding. Heavy RPO’s pour point (max +27°C to +36°C) reflects flow behaviour in cooler climates. |
🧬 Carbon Type Distribution (CA/CN/CP) — ASTM D-3238Heavy RPO Grade 2 shows an aromatic carbon (CA) content of 35–45%, naphthenic (CN) of 20–25%, and paraffinic (CP) of 30–40%. This carbon-type balance is what gives the oil its solvency and compatibility with rubber polymers — the higher the aromatic (CA) share, the stronger the oil’s compatibility with SBR and other rubber compounds. |
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Light vs Heavy RPO — Key Differences
| Parameter | Light RPO | Heavy RPO |
|---|---|---|
| Viscosity @100°C | 20–35 cSt | 30–50 cSt |
| Flash Point | 200–230°C | 230–240°C |
| Typical Use | General rubber compounding, lower-viscosity needs | SBR extender oil, tyres, belting, battery cases |
| Colour Sensitivity | Where colour is less critical | Used where colour is not a critical parameter |
| Aniline Point | Not specified | Max 40–45°C (higher aromaticity) |
Rubber Process Oil Applications
🛞
Tyre ManufacturingExtender oil in SBR-based tyre compounds, improving filler dispersion and processability. |
⚙️
Conveyor BeltingEnhances flexibility in industrial belting compounds where colour is not a critical factor. |
🔋
Battery CasesUsed in dark rubber compounds for battery casings, benefiting from strong polymer compatibility. |
🧵
Hoses & SealsImproves flow and filler dispersion, supporting consistent extrusion and molding. |
🏭
General Rubber GoodsCost-effective processing aid across molded and extruded industrial rubber products. |
🧪
Compound CustomizationLight and Heavy grades let formulators fine-tune viscosity and aromaticity per compound. |
Rubber Process Oil — Live CFR Price Calculator
Select grade, loading port and destination to estimate your CFR price. FOB prices below are updated weekly by our team.
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Current FOB: $850 / MT
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Estimate only — final CFR price confirmed at time of booking. Excludes destination charges, duties, and insurance (add CIF on request).
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Packaging Options for Rubber Process Oil
| Packing Type | Detail | Best For |
|---|---|---|
| New/Used Steel Drum | 180 kg — 80 drums / 20ft FCL | Standard export, small–mid volumes |
| ISO Tank | Bulk liquid shipment | Large-volume repeat buyers |
| Flexitank | Bulk liquid inside standard 20ft container | Cost-efficient bulk without ISO tank logistics |
| Bulk Vessel | On request for large volumes | Large infrastructure / tyre-plant supply contracts |
HS Code & Export Markets
HS Code 2710.19 — Other petroleum oils and oils obtained from bituminous minerals, other than crude — preparations not elsewhere specified. National tariff codes may extend to 8–10 digits; always confirm the exact classification with your local customs authority.
Frequently Asked Questions — Rubber Process Oil
What is Rubber Process Oil used for?
RPO is used as a processing aid and extender oil in rubber compounding — improving flow during mixing and extrusion, aiding filler dispersion, and adding flexibility to tyres, conveyor belting, hoses, and other industrial rubber goods.
What is the difference between Light and Heavy Rubber Process Oil?
Light RPO has a kinematic viscosity of 20–35 cSt at 100°C, while Heavy RPO ranges from 30–50 cSt depending on grade. Heavy RPO is typically used as an extender oil in SBR (styrene-butadiene rubber) manufacturing, where colour is not a critical parameter.
How is RPO packaged for export?
Zumrut ships RPO in new or used 180 kg steel drums (80 drums per 20ft container), ISO tanks, flexitanks, or bulk vessel shipment, loaded from Iskenderun or Mersin.
Why does Heavy RPO specify a maximum aniline point instead of a range?
The aniline point indicates aromaticity and rubber compatibility — a lower value means higher aromaticity and better solvency. Heavy RPO grades cap this at 40–45°C maximum to guarantee a minimum level of compatibility with rubber polymers.
What is the HS code for Rubber Process Oil?
RPO is generally classified under HS Code 2710.19 (other petroleum oils, not crude, preparations not elsewhere specified). Exact national tariff codes vary — confirm with your customs broker before shipment.
Can I get a CFR price for my destination port?
Use the calculator above for an instant estimate, or contact us via WhatsApp with your exact destination and quantity for a firm, booking-ready CFR quote.
Related Products & Pages
| Base Oil SN150–SN650 grades, FOB Turkey |
Recycled Base Oil RC Base Oil SN150 |
Bright Stock High-viscosity residual base oil |
Request RPO Pricing & Specifications
Tell us your required grade, quantity, and destination port — we respond within 24 hours with FOB/CFR pricing and full documentation (COA, MSDS).
