TPV vs TPE is a common question when a rubber part moves to injection molding or extrusion. Strictly, TPV is one kind of thermoplastic elastomer (TPE). In everyday buying, though, “TPE” usually means a soft compound based on SEBS, so the real choice is between a TPV and an SEBS-based TPE. They look and feel alike at room temperature but behave very differently when hot, under compression or in oil. As a formulation development partner, SYCHEM TECH supplies both and helps compounders and molders choose.
Short answer: choose TPV for seals, gaskets and boots that must keep their shape under compression at higher temperatures (up to about 135 °C) or in contact with oil. Choose an SEBS-based TPE for soft-touch grips, very soft parts, colourful consumer goods and two-shot overmolding onto PP, ABS, PA or PC/ABS, where service stays below about 110 °C and cost matters.
TPV vs TPE: what the two terms mean
TPE is the whole class of rubber-like materials that melt and can be molded like plastics. It has five main families: TPS (styrenic, based on SEBS or SBS), TPV, TPU, TPEE and TPO. When a buyer asks for “TPE” without naming a family, they almost always mean a TPS compound: SEBS blended with oil, PP and filler.
TPV (thermoplastic vulcanizate) is made by dynamic vulcanization. EPDM rubber is mixed with polypropylene and crosslinked while it is being mixed, so it ends up as tiny cured rubber particles in a continuous PP matrix. The PP lets the material melt and flow; the cured rubber gives it rubber-like recovery that survives heat.
An SEBS-based TPE has no chemical crosslinks. Its hard polystyrene end blocks cluster into domains that tie the soft rubbery chains together. Those physical links are strong at room temperature but soften as the temperature rises, which is why SEBS compounds lose shape-holding sooner than TPV.
TPV vs TPE comparison table
| Property | TPV | SEBS-based TPE (TPS) |
|---|---|---|
| Structure | Crosslinked EPDM rubber particles in a PP matrix | SEBS (or SBS) block copolymer compounded with oil and PP |
| How it holds its shape | Chemical crosslinks in the rubber phase | Physical polystyrene domains |
| Hardness range | 40A–60D | 30A–50D |
| Maximum service temperature | About 135 °C | About 110 °C |
| Compression set when hot | Low; the main reason TPV is used for seals | Rises faster as temperature climbs |
| Oil and solvent resistance | Fair to excellent, depending on grade | Poor |
| UV and weathering | Good | Fair to good; UV-stabilized grades available |
| Two-shot overmolding | Bonds to PP; high-flow grades to PP, ABS and PA | Bonds to PP, ABS, PA, PC/ABS and PMMA |
| Softest grades | About 40A | Down to about 30A, with a soft, silky feel |
| Colour | Mostly black or natural | Easy to colour across a broad range |
| Density | 0.9–1.0 g/cm³ | 0.9–1.2 g/cm³ |
| Recycling | Thermoplastic; scrap can be reground | Thermoplastic; scrap can be reground |
| Relative price | Usually higher | Usually lower for general grades |
Hardness, temperature and resistance ratings are from our TPV and TPE product page. They are typical family ranges, not specifications; every grade differs, so ask for the TDS of the exact grade.
When TPV is the better choice
- Automotive sealing: door and window seals, cowl and drip rail seals, luggage rack seals
- Dust boots: blow-molded suspension and steering rack boots in harder grades such as 40D
- EV charging port and fuel cap seals, using high-flow grades that bond to PP, ABS or PA
- Building and construction: window and door profiles, pipe gaskets and expansion joints
- Industrial seals and hose parts that see oil, chemicals or flex fatigue
- Replacing vulcanized EPDM rubber to cut weight, cycle time and scrap; see POE vs EPDM for how the rubber options compare
When an SEBS-based TPE is the better choice
- Soft-touch grips on tools, handles, toothbrushes and household goods
- Two-shot overmolding onto PP, ABS, PA, PC/ABS or PMMA without adhesives
- Very soft parts below about 40A, and gels
- Coloured consumer products where a broad colour range matters
- Automotive exterior seals overmolded on PP or ABS, such as cowl, rear lamp and active grille seals, using UV-stabilized grades
- Medical tubing and personal-care parts based on clean SEBS; see SEBS vs SBS for the base polymer choice
TPV vs TPE for seals and gaskets
Sealing is where the difference shows most. A seal works only while it pushes back against the surface it seals. Compression set measures how much of that push is lost after the seal has been squeezed for a long time, and heat makes it worse.
- Hot, compressed or oily seals: TPV. The cured rubber particles keep pushing back at higher temperatures, and oil-resistant grades handle automotive fluids.
- Mild-temperature seals overmolded on a rigid part: an SEBS-based TPE often works and bonds to more substrates, which can remove an assembly step.
- Test, do not assume: measure compression set at your real service temperature and time, not only at room temperature.
Other TPE families to consider
If neither TPV nor an SEBS-based TPE fits, one of the other families usually does:
| TPE family | Hardness | Max service | Choose it for |
|---|---|---|---|
| TPV | 40A–60D | 135 °C | Seals, weatherstrip, dust boots, under-hood rubber parts |
| TPS (SEBS/SBS) | 30A–50D | 110 °C | Soft touch, two-shot overmolding, colourful consumer parts |
| TPU | 70A–50D | 120 °C | Abrasion and scratch resistance, interior soft pads, footwear |
| TPEE | 65A–72D | 150 °C | Oil and heat: CVJ boots, air intake hoses, bellows |
| TPO | 40D–50D | 120 °C | Semi-rigid parts such as airbag covers, low density |
Processing tips for TPV and SEBS-based TPE
- Drying: TPV usually needs drying before molding to avoid splay and bubbles. SEBS compounds normally do not, unless the supplier says so.
- Two-shot bonding: adhesion depends on the pairing of grade and substrate. Tell the supplier the substrate, and run peel tests on real parts.
- Regrind: both can be reground, but keep TPV and SEBS scrap apart; mixing them weakens both.
- Stabilization: both families contain PP and rubber that need protection during processing and in service; check the antioxidant and HALS package for heat and outdoor parts.
- Shrinkage and flow: TPV generally needs higher melt temperatures and shear to fill thin sections; high-flow TPV grades exist for overmolding.
TPV vs TPE cost: compare the finished part
A general-purpose SEBS-based TPE usually costs less per kilogram than TPV. That is the right comparison only if both meet the part’s temperature, compression set and oil requirements. A cheaper TPE seal that loses its sealing force in a warm car or an engine bay costs far more in warranty claims than the material saved. Where the requirements are mild, the SEBS route is usually the economical one, especially when overmolding removes an assembly step.
Frequently asked questions
Is TPV a TPE?
Yes. TPV is one family of thermoplastic elastomers. In trade use, “TPE” usually means an SEBS-based compound, which is why TPV and TPE are often compared as if they were separate materials.
Is TPV the same as EPDM?
No. TPV contains EPDM rubber, but the rubber is crosslinked as small particles inside polypropylene, so TPV melts and can be injection molded or extruded. Solid vulcanized EPDM cannot be remelted.
Can TPV replace EPDM rubber?
In many seals, profiles and boots, yes. TPV is lighter, needs no curing step and its scrap can be reused. For the highest temperatures or the lowest compression set, vulcanized EPDM may still be needed.
Which is softer, TPV or TPE?
SEBS-based TPE goes softer: down to about 30A, against about 40A for TPV. Both reach semi-rigid hardness in the 50D–60D range.
Which is better for overmolding?
SEBS-based TPE bonds to more substrates: PP, ABS, PA, PC/ABS and PMMA. TPV bonds mainly to PP, with special high-flow grades for ABS and PA.
Get a TPV or TPE recommendation
Still weighing TPV vs TPE? Tell us the part, target hardness, service temperature, any oil or chemical contact, the substrate for overmolding and your annual volume. We will suggest a family and grade, email you the TDS and arrange samples. Contact our technical team or write to info@sychemtech.com.
Related products: our TPV and TPE range (TPV, TPS, TPU, TPEE and TPO), SEBS and SBS base polymers including LCY SEBS, POE elastomers, and all specialty elastomers. For styrenic parts, see also the ABS grade selection guide.
