PDMS Silicone Antifoam
PDMS silicone antifoam — polydimethylsiloxane, the classic and most powerful silicone antifoam. Highly effective surface foam control at very low treat rates for engine and industrial oils.
The classic, powerful silicone antifoam
Foam ruins lubrication — it carries air into pumps, accelerates oxidation and causes overflow. PDMS silicone antifoam controls surface foam powerfully at very low treat rates.
PDMS (polydimethylsiloxane) silicone antifoam is the classic and most powerful foam-control additive. Insoluble silicone droplets dispersed in the oil destabilize foam bubbles at the surface, collapsing foam rapidly at very low treat rates (parts per million). It is highly effective at controlling surface foam in engine oils, industrial oils and many lubricants. The trade-off to manage is air release: too much silicone, or poor dispersion, can slow the release of entrained air, so dose and dispersion are controlled carefully — in air-release-critical oils like turbine oils, silicone-free types may be preferred. It is part of the antifoam agents range.
PDMS Silicone Antifoam — typical properties
Representative typical values for PDMS silicone antifoam. Indicative only — exact values vary by grade and are confirmed on the TDS and batch COA.
| Property | Typical Value | Method / Note |
|---|---|---|
| Appearance | Cloudy liquid / emulsion or oil dispersion | Grade-dependent |
| Active type | Polydimethylsiloxane (PDMS) | Silicone |
| Typical treat rate | Very low (ppm level) | Highly effective |
| Foam control | Powerful (surface foam) | Classic antifoam |
| Air release | Manage dose/dispersion | Trade-off |
| Viscosity (silicone) | Grade-dependent (cSt) | Various grades |
| Function | Antifoam | Surface foam control |
Typical values for guidance only — not a specification. Request the TDS for the specific grade you need; the COA reports actual measured values for your batch.
Where PDMS silicone antifoam is used
Engine Oils
Surface foam control in passenger car and diesel oils. See engine oil additives.
Industrial Oils
Powerful foam control for gear, circulating and many industrial oils.
Gear Oils
Controls foam in churning gearsets. See transmission fluid additives.
General Lubricants
Low-dose foam control across a wide range of oils.
Why formulators choose PDMS silicone antifoam
Powerful at low dose
Highly effective surface foam control at parts-per-million treat rates.
Classic proven chemistry
Polydimethylsiloxane — the established, reliable antifoam standard.
Broadly effective
Controls surface foam across engine, gear and industrial oils.
From sample drum to ISO tank
Sinolook supplies PDMS silicone antifoam at any scale, from formulation samples to commercial bulk, to over 60 countries.
Frequently asked questions
What is PDMS silicone antifoam used for?
How does silicone antifoam work?
What is the difference between foam control and air release?
Why is the treat rate of silicone antifoam so low?
Can Sinolook provide TDS, MSDS and COA?
Request PDMS silicone antifoam from Sinolook
Tell us your target grade, application and volume — we'll send the TDS, a batch COA and a delivered quotation within 24 hours.
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