PDMS Viscosity Guide: Choosing the Right Grade
Polydimethylsiloxane (PDMS) viscosity determines flow, spreading, lubricity, and processability. Use the table below to match grade to application.
| Spec | ZEMSIL DM-5 | ZEMSIL DM-50 | ZEMSIL DM-200 | ZEMSIL DM-1000 | ZEMSIL DM-12500 | ZEMSIL DM-60000 |
|---|---|---|---|---|---|---|
| Viscosity (cSt, 25 °C) | 5 | 50 | 200 | 1,000 | 12,500 | 60,000 |
| Appearance | Water-clear fluid | Clear fluid | Clear fluid | Viscous clear | Thick, clear | Semi-gel |
| Pour point | < −65 °C | < −60 °C | < −55 °C | < −50 °C | −40 °C | −35 °C |
| Refractive index | 1.397 | 1.400 | 1.403 | 1.404 | 1.404 | 1.404 |
| Best for | Cosmetics, spreading aids | Mold release, textile | Lubricant base, coatings | Hydraulic / damping fluid | High-damping, gear oil | Sealant base, putty, gap filler |
How to choose
- ▸≤ 50 cSt — carrier fluids, spreading, cosmetics, and light lubrication.
- ▸100–500 cSt — release agents, textile finishing, coatings, and personal care.
- ▸1,000–5,000 cSt — hydraulic systems, shock dampers, sealant base.
- ▸≥ 10,000 cSt — gel bases, grease thickeners, putty, and gap-fill compounds.
Products compared
ZEMSIL DM-5
Polydimethylsiloxane (PDMS)
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ZEMSIL DM-50
Polydimethylsiloxane (PDMS)
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ZEMSIL DM-200
Polydimethylsiloxane (PDMS)
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ZEMSIL DM-1000
Polydimethylsiloxane (PDMS)
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ZEMSIL DM-12500
Polydimethylsiloxane (PDMS)
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ZEMSIL DM-60000
Polydimethylsiloxane (PDMS), Ultra-High Viscosity
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