Santoprene 101-64: specs and equivalent grades
Soft, black thermoplastic vulcanizate (TPV) from Celanese for molding, extrusion and blow molding. Published data from the current Celanese sheet, grades to ask about, and how to request a quote from one gaylord.
Request a QuoteThe short answer
Santoprene 101-64 is a soft, black, polyolefin-based thermoplastic vulcanizate (TPV) from Celanese. Celanese recommends it for parts that need excellent flex fatigue resistance and notes excellent ozone resistance. The current sheet (revised 2026-08-12) lists Shore A 70 on a 15 second reading (ISO 48-4 / ISO 868); the 64 in the grade name is a grade designation, not the measured hardness. It also gives density 0.97 g/cm³, tensile stress at break 6.47 MPa, elongation at break 450 % and compression set of 25 % at 70°C, 24 h (ISO 815). Celanese does not publish a melt flow rate; it says the grade is shear dependent. These are typical values; confirm them on the current producer data sheet. The closest grade to ask about is Celanese’s natural, colorable Santoprene 201-64. No grade is a drop-in replacement.
Also written as: Santoprene 101-64 TPV, Santoprene 101-64 black. Santoprene was an ExxonMobil brand until Celanese bought the business in December 2021, so older paperwork may say ExxonMobil. The 64 in the name is not the current measured hardness: the sheet lists Shore A 70 at 15 seconds. Quote the full grade code from your drawing or bag label.
Buying Santoprene 101-64: one gaylord to a railcar · supplier COA on every prime lot · ships from 22+ partner warehouse locations · a polymer chemist reviews every request · we aim to quote within 1–3 business days
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Santoprene 101-64 specs from the data sheet
Typical values from Celanese’s Santoprene 101-64 data sheets (SI and US units, Celanese Materials Database, revised 2026-08-12). Typical values are not specifications; the lot COA shows what you actually receive. Values only compare at the same test method and condition. Values for the natural 201-64 are not mixed in here; see the equivalents table.
| Property | Value | Test method or note |
|---|---|---|
| Producer (brand owner) | Celanese | Data sheet revised 2026-08-12 (Celanese Materials Database). Formerly an ExxonMobil brand |
| Polymer | Thermoplastic vulcanizate (TPV), polyolefin based, black, soft | ISO 1043 resin identification TPV. Celanese says it is recyclable within the manufacturing stream |
| Process | Injection molding, multi-injection molding, extrusion (including small tubing and sheet), coextrusion, blow molding (injection and extrusion) | As listed on the sheet |
| Melt flow | Not published | Celanese says the grade is shear dependent: viscosity is high at low shear and drops as shear rate rises |
| Density | 0.97 g/cm³ (970 kg/m³; 0.035 lb/in³) | ISO 1183 |
| Mold shrinkage, parallel / normal | 3.2 % / 0.8 % | ISO 294-4, 2577; 2.0 mm, at least 24 h after molding (Celanese method TPE-X0080) |
| Hardness | Shore A 70 (15 second reading) | ISO 48-4 / ISO 868, 15 second delay. The 64 in the grade name is a grade designation, not this measured value |
| Tensile stress at break, perpendicular | 6.47 MPa (938 psi) | ISO 37 |
| Tensile stress at 100 % elongation, perpendicular | 2.83 MPa (410 psi) | ISO 37 |
| Elongation at break, perpendicular | 450 % | ISO 37 |
| Tear strength, normal | 23 kN/m | ISO 34-1 |
| Compression set | 25 % (70°C, 24 h); 44 % (125°C, 70 h) | ISO 815 |
| Heat aging, 150°C, 168 h | Tensile strength −9.4 %; elongation at break −7.7 %; Shore A +1.3 | ISO 188 |
| Brittleness temperature | −60°C (−76°F) | ASTM D746; ISO 812 also −60°C |
| UL 94 flame rating | HB at 1.5 mm and 1.0 mm, UL recognized; UL files QMFZ2.E80017 and QMFZ8.E80017 | UL 94 / IEC 60695-11-10 |
| Relative thermal index | 90°C electrical (1.5 and 3.0 mm); 90°C strength at 1.5 mm, 95°C at 3.0 mm | UL 746B |
| Outdoor and detergent suitability | UL 746C f1 (outdoor); UL 749 f3 and UL 2157 f4 (detergent) | As listed on the sheet |
| Automotive interior burn rate | FMVSS class B; 24 mm/min at 2 mm | ISO 3795 (FMVSS 302) |
| Relative permittivity, 60 Hz | 2.5 | IEC 62631-2-1 |
| Drying | 80°C / 176°F for at least 3 h in a dehumidifying dryer; max moisture 0.08 % | Producer injection data. Extrusion: 82°C for 3 h |
| Melt / mold temperature, injection | Melt 185–220°C, optimum 200°C (392°F); mold 10–50°C, optimum 30°C (86°F); max regrind 20 % | Producer injection data. Extrusion melt 196°C (385°F) |
| Compatibility | Incompatible with acetal and PVC | Producer processing note |
| Automotive approvals listed | BMW GS93042; Ford WSD-M2D379-A1 and WSS-M9P9-D2; GM GMW15813P-TPV-(EPDM+PP)-Type 5; Hyundai MS220-05 Type B and MS220-31 Type A1; Mercedes-Benz DBL5562; SAIC SMTC 5 320 024; Stellantis 55248_02 EMP70; VW 50123 | As listed on the sheet. A Renault line is marked special part approval only |
| Food contact | Not stated on the sheet | Ask Celanese for a statement for the exact grade |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
How to read the hardness: Celanese reports Shore A 70 after a 15 second delay (ISO 48-4 / ISO 868). Durometer readings drop the longer the indenter stays on the sample, so a 1, 3 or 5 second reading on the same specimen reads higher than the 15 second value. The 64 in the grade name is therefore not a shorter-delay version of this reading; treat it as a grade designation. Readings also shift with specimen type (molded or extruded) and thickness, so compare hardness only at the same standard, delay time and specimen.
Grades to ask about instead of Santoprene 101-64
The closest option is Celanese’s natural, colorable Santoprene 201-64, which has nearly the same published properties and processing window. Celanese does not publish melt flow for either grade, so flow is matched only by the same processing temperatures on the sheets. None is a drop-in replacement. If your part, drawing or automotive spec names Santoprene 101-64, any change needs that approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Santoprene 201-64 | Celanese | Not published (same 200°C optimum melt on its sheet) | 0.97 g/cm³ (ISO 1183) | Shore A 69 (15 second reading); tensile stress at break 7 MPa; 100 % modulus 2.6 MPa; elongation 450 %; tear 22 kN/m; compression set 25 % (70°C, 24 h) and 44 % (125°C, 70 h) | Natural and colorable rather than black, with almost the same published numbers. Its RTI is higher for electrical use (100°C vs 90°C). Its automotive list is shorter: Ford WSD-M2D379-A1 and Stellantis 55248_02 EMP60, with GM as a special parts approval only. Check your spec before you switch. Sheet revised 2026-08-12. Quote this alternative › |
From each producer’s published data; typical values, confirm on the current producer data sheet. Brand owners and grade names change.
Need it a little harder? Santoprene 101-73 is the next black grade up: Shore A 78 on a 15 second reading, tensile stress at break 7.98 MPa and compression set 27 % at 70°C, 24 h. It is not an equivalent because the hardness is 8 points higher. For a much harder black grade, see Santoprene 101-80 (Shore A 87 on a 15 second reading). We did not list TPVs from other producers: none publish a melt flow we could match, and their hardness and compression set are often reported at different dwell times and test lengths. Ask us if you want one quoted. For the wider choice of rubber-like materials, see TPV vs. EPDM.
Typical uses for Santoprene 101-64
Celanese describes Santoprene 101-64 as a versatile TPV for a wide range of applications and recommends it where excellent flex fatigue resistance is needed. The sheet supports these uses:
- Molded and extruded parts that flex repeatedly and see ozone
- Automotive parts covered by the approvals on the sheet (BMW, Ford, GM, Hyundai, Mercedes-Benz, SAIC, Stellantis and VW specifications)
- Outdoor parts (UL 746C f1) and appliance parts exposed to detergent (UL 749 f3, UL 2157 f4)
- Small tubing, sheet, coextruded and blow-molded parts
What to check before you switch
- Owner check: the current sheet is issued by Celanese. Older paperwork may say ExxonMobil. Confirm on your quote who issues the COA and any compliance letters.
- Hardness check: the name says 64 but the current sheet lists Shore A 70 at 15 seconds (ISO 48-4 / ISO 868). If a drawing calls for Shore A 64, confirm the standard and delay time it means before you treat 101-64 as a match, and write the hardness, standard and delay time you need on the RFQ.
- Compare compression set at the same standard, temperature and time. Seals depend on this number. See seal compression set problems.
- Shrinkage is very different by direction: 3.2 % in flow and 0.8 % across flow on the sheet. A substitute can change part dimensions even at the same hardness.
- Keep it away from acetal and PVC in the barrel. Celanese lists Santoprene TPV as incompatible with both.
- Dry it. Celanese recommends desiccant drying for 3 hours at 80°C. See our resin drying guide.
- Check fluids and oils for your actual service conditions, and run a trial on your tool or die for shrinkage, surface finish and any bond to a hard substrate.
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Buying Santoprene 101-64: price, lead time and lot size
- Lot size. From one gaylord to a railcar. See gaylord, LTL and truckload for typical weights per box.
- Where it ships from. 22+ partner warehouse locations. Lead time is confirmed with your quote.
- Price. We do not publish prices because they move with feedstock, freight and order size. What moves your price most: lot size, black versus a natural or custom color, ship-to region, and whether you need Santoprene 101-64 itself or can accept a matched alternative. See how resin is priced and the monthly market update.
- Paperwork. Supplier COA on every prime lot (what a COA shows). Ask for the producer’s UL file or automotive approval letters if your part needs them. Payment terms are confirmed with your quote.
- Trying an alternative? Samples (~50 lb) are available upon credit approval, or start with one gaylord as a trial lot. Custom compounding and color are available.
- If Santoprene 101-64 itself is not available. If we cannot source it, we tell you, then quote a matched alternative with a side-by-side comparison.
Send the grade and color, your annual volume and ship-to location. A polymer chemist reviews every request before we quote. For several grades at once, use the resin RFQ template.
Trade names belong to their owners. ResinBridge is not affiliated with these producers; grade names are used only to identify the material. Data reflects published sheets as of November 2026.
Sources
- Celanese Santoprene 101-64 data sheet, SI units (Celanese Materials Database, revised 2026-08-12, PDF)
- Celanese Santoprene 101-64 data sheet, US units (Celanese Materials Database, revised 2026-08-12, PDF)
- Celanese Chemille grade page: Santoprene 101-64 (description, color, approvals)
- Celanese Santoprene 201-64 data sheet, SI units (revised 2026-08-12, PDF)
- Celanese Chemille grade page: Santoprene 201-64
- Celanese Santoprene 101-73 data sheet, SI units (revised 2026-08-12, PDF)
- Celanese Santoprene TPV product page (brand owner)
Common questions
What is Santoprene 101-64?
Santoprene 101-64 is a soft, black, polyolefin-based thermoplastic vulcanizate (TPV) from Celanese. It runs on standard thermoplastic equipment for injection molding, extrusion and blow molding. Celanese recommends it for parts that need excellent flex fatigue resistance and notes excellent ozone resistance. It was an ExxonMobil brand until December 2021.
What is the hardness of Santoprene 101-64?
Celanese’s current sheet lists Shore A 70, read after a 15 second delay (ISO 48-4 / ISO 868). The 64 in the grade name is a grade designation, not the value on the current sheet. A different delay time does not explain the gap: a shorter reading on the same specimen gives a higher number, not a lower one. When you compare sheets or write an RFQ, state the Shore A value, the standard and the delay time.
What is the melt flow of Santoprene 101-64?
Celanese does not publish a melt flow rate for this grade. The sheet says Santoprene TPV is shear dependent: viscosity is high at low shear and drops as shear rises, and temperature has little effect. Smaller gates and higher shear help it fill.
What is the difference between Santoprene 101-64 and 101-73?
Both are black Celanese TPVs with the same density (0.97 g/cm³). 101-73 is harder (Shore A 78 vs 70 at 15 seconds) and stronger (tensile at break 7.98 vs 6.47 MPa). Compression set is close: 27 vs 25 % at 70°C, 24 h, and 41 vs 44 % at 125°C, 70 h. Their automotive approval lists differ.
What is equivalent to Santoprene 101-64?
No grade is a drop-in replacement. The closest grade to ask about is Celanese’s Santoprene 201-64, the natural, colorable version with nearly the same published values (Shore A 69, compression set 25 % at 70°C). Its automotive approval list is shorter, so check your spec. Compare data sheets, run a trial and get approval if your part names 101-64.
Is Santoprene 101-64 UL listed or food contact compliant?
Celanese lists UL files QMFZ2.E80017 and QMFZ8.E80017, UL 94 HB recognition at 1.5 mm and 1.0 mm, UL 746B relative thermal indices of 90°C (95°C for strength at 3.0 mm) and UL 746C f1 outdoor suitability. The sheet does not state food contact compliance.
How do you dry and mold Santoprene 101-64?
Celanese recommends desiccant drying for at least 3 hours at 80°C to 0.08 % moisture or less. Injection melt is 185–220°C with a 200°C optimum, mold 10–50°C, and up to 20 % regrind. Keep acetal and PVC out of the barrel; Celanese lists them as incompatible.
Can ResinBridge quote Santoprene 101-64?
Yes. Send the grade and volume. A polymer chemist reviews every request, and we quote Santoprene 101-64 where we can source it, or a matched alternative, and say which one. Orders start at one gaylord; U.S. and Canada only.
If your grade is not listed, tell us what you run. We source commodity, engineering and specialty resins.
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What to send for an accurate quote
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- Fill type and percentage, if any
- Melt flow, if you know it
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- Ship-to city and state or province
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