Santoprene 101-73: specs and equivalent grades
Santoprene 101-73 is a TPV from Celanese. Published specs, grades from other producers to ask about, and how to buy it from one gaylord to a railcar.
Updated October 28, 2026
Request a QuoteThe short answer
Santoprene 101-73 is a thermoplastic vulcanizate (TPV), polyolefin based, black, from Celanese. Density: 970 kg/m³ (0.97 g/cm³, about 0.035 lb/in³). Grades from other producers to ask about include Sarlink TPV 4175 and Permaprene 2800 B-75A. They are not identical, so compare the data sheets and run a trial before switching.
Buying Santoprene 101-73: from one gaylord to a railcar · supplier COA on every prime lot · Santoprene 101-73 or a qualified equivalent, named on your quote · a polymer chemist reviews every request · we aim to quote within one to three business days
Have a part number or drawing callout?
Paste it as written. A polymer chemist will tell you which grade it calls for, suggest equivalents and quote it by email.
Santoprene 101-73 specs from the data sheet
Typical values from the producer’s published data sheet (Santoprene 101-73 (Celanese EN-US and SI data sheets, 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.
| Property | Value | Test method or note |
|---|---|---|
| Producer (brand owner) | Celanese | Data sheet |
| Polymer | Thermoplastic vulcanizate (TPV), polyolefin based, black | |
| Process | Injection molding, extrusion, blow molding, thermoforming | |
| Melt flow rate | Not published | Not published |
| Density | 970 kg/m³ (0.97 g/cm³, about 0.035 lb/in³) | ISO 1183 |
| Hardness | Shore A 78 (15 second reading) | ISO 48-4 / ISO 868 |
| Tensile stress at break, perpendicular | 7.98 MPa (1,160 psi) | ISO 37 |
| Tensile stress at 100% elongation, perpendicular | 3.44 MPa (499 psi) | ISO 37 |
| Elongation at break, perpendicular | 478% | ISO 37 |
| Flexural modulus | Not published | Not published |
| Compression set, 70 °C (158 °F), 24 h | 27% | ISO 815 |
| Compression set, 125 °C (257 °F), 70 h | 41% | ISO 815 |
| Tear strength, normal | 25 kN/m (about 143 lbf/in) | ISO 34-1 |
| Brittleness temperature | -60 °C (-76 °F) | ASTM D746 |
| UL 94 flame rating | HB, UL recognized at 1.5 mm (0.059 in) and 1.0 mm (0.039 in) | UL 94 / IEC 60695-11-10 |
Source data sheets are listed at the bottom of this page. Confirm against the current sheet for your exact grade code and color.
Grades to ask about instead of Santoprene 101-73
These grades from other producers have similar published specs. None is a drop-in replacement: additive packages, flow at molding shear rates, color and approvals differ. If your part, drawing or customer approval names Santoprene 101-73, any change needs your approval and usually a trial.
| Grade | Producer | Melt flow | Density | Key property | How it compares |
|---|---|---|---|---|---|
| Sarlink TPV 4175 | Teknor Apex | Not published (sheet gives capillary viscosity of 340 Pa·s at 206/s and 200 °C) | 0.960 g/cm³ (ISO 1183) | Shore A 75 injection molded and 72 extruded (5 second reading); compression set 31% at 70 °C, 22 h (ISO 815); tensile at break 8.5 MPa across flow (ISO 37); UL 94 HB at 1.0 mm | Close to Santoprene 101-73 in density and hardness range, with similar compression set at 70 °C. The hardness is a 5 second reading against Celanese's 15 second reading, and the compression set test runs 22 h rather than 24 h, so the numbers are not like for like. It lists Ford WSD-M2D380-A1 and GM GMW15813 Type 6 among its specifications, as does Santoprene 101-73. This is not a drop-in replacement. |
| Permaprene 2800 B-75A | RTP Company | Not published | Specific gravity 1.01 (ASTM D792) | Shore A 78 (10 second delay, ASTM D2240); tensile strength 7 MPa (1,000 psi) and elongation 550% (ASTM D412, Die C); compression set 48% at 70 °C, 22 h (ASTM D395 Method B) | Similar hardness and tensile strength, but heavier (1.01 vs 0.97). Compression set is reported by ASTM D395 rather than ISO 815, so it cannot be compared directly with Santoprene's 27%. RTP's HB rating at 1.5 mm comes from RTP's own ASTM D635 testing, not a UL listing. This is not a drop-in replacement. |
From each producer’s published data. Brand owners and grade names change; confirm on the current data sheet.
Typical uses for Santoprene 101-73
Celanese describes Santoprene 101-73 as a versatile TPV that combines good physical properties and chemical resistance for use in a wide range of applications, and recommends it where excellent flex fatigue resistance is needed. The sheet also lists automotive OEM approvals, including Ford WSD-M2D380-A1, GM GMW15813P Type 6 and VW 50123.
What to check before you switch
- Compare hardness at the same reading time and specimen type; TPV hardness depends on dwell time and molded vs extruded samples.
- Compare compression set at the same standard, temperature and duration, since seals live or die on this number.
- Check fluid and oil resistance for your actual service fluids rather than relying on general claims.
- Run trials on your tool or die and check shrinkage, surface finish and bonding to any substrate.
- Check whether an automotive or customer specification names Santoprene 101-73; a substitute usually needs formal approval.
Buying Santoprene 101-73 or an equivalent
Send us the grade name, your annual volume and ship-to location. A polymer chemist checks the data sheet and we quote Santoprene 101-73 where we can source it, or a qualified equivalent, saying clearly which one you would get. Orders start at one gaylord. For background on this resin family see TPE and TPV grades and buying guide; 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 October 2026.
Sources
- Celanese Santoprene 101-73 data sheet (US units, Celanese Materials Database, revised 2026-08-12)
- Celanese Santoprene 101-73 data sheet (SI units, Celanese Materials Database, revised 2026-08-12)
- Teknor Apex Sarlink TPV 4175 data sheet
- RTP Company Permaprene 2800 B-75A data sheet
Common questions
What is Santoprene 101-73?
Santoprene 101-73 is a soft, black thermoplastic vulcanizate (TPV) from Celanese. It is polyolefin based, can be run on standard thermoplastic equipment for injection molding, extrusion, blow molding and thermoforming, and Celanese recommends it for parts that need excellent flex fatigue and ozone resistance.
What is the hardness of Santoprene 101-73?
Celanese's current data sheet lists Shore A 78 on a 15 second reading (ISO 48-4 / ISO 868), even though the grade name ends in 73. Celanese does not publish a melt flow rate for this grade; the sheet notes that the material is shear dependent and that its viscosity drops as shear rate rises.
What is equivalent to Santoprene 101-73?
There is no exact equivalent. Teknor Apex Sarlink TPV 4175 and RTP Company Permaprene 2800 B-75A are TPVs in a similar hardness range, but they are tested with different hardness dwell times and compression set methods, and Permaprene is denser. Any switch needs testing and, where required, customer approval.
Is Santoprene 101-73 UL listed or food contact compliant?
Celanese lists UL file QMFZ2.E80017 (Plastics, Component) and QMFZ8.E80017 (Plastics Certified for Canada, Component), 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.
Can ResinBridge quote Santoprene 101-73?
Yes. Send the grade name and volume. A polymer chemist checks it and we quote the grade where we can source it, or a qualified equivalent, and say which. Orders start at one gaylord; U.S. and Canada only.
Need Santoprene 101-73 or an equivalent?
A polymer chemist reviews every request, then matches your grade or finds a qualified equivalent and prices it.
What to send for an accurate quote
- The grade name, from any supplier, or a data sheet
- Color (natural, black or a custom match)
- Fill type and percentage, if any
- Melt flow, if you know it
- Quantity for this order and what you use in a year
- Ship-to city and state or province
Quote Santoprene 101-73 or a qualified equivalent
A polymer chemist checks the data sheet and tells you exactly what you would get before you order.
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