Premium Chemically Inert Silicone Oil for Professional Mold and Lubrication Applications
Silicone Oil 100 cSt is a colorless, chemically inert polydimethylsiloxane (PDMS) fluid with a viscosity of 100 cSt and a density of 0.965 g/cm³ at 25°C. With a flash point exceeding 300°C, a pour point of -55°C, and a surface tension of 20.9 mN/m, Silicone Oil 100 cSt offers an excellent balance between fluidity and film retention. The 100 cSt grade is the most versatile in the range: thin enough for even spreading on complex surfaces, thick enough for a durable lubricating and release film. Food grade version (PC grade) available in accordance with EC 1935/2004 and FDA 21 CFR 173.340.
Key Benefits
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Flash Point >300°C: High thermal stability – safe for use at elevated temperatures in most industrial processing applications.
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Viscosity 100 cSt at 25°C: Most versatile grade in the range – combines good spreading with durable film retention on vertical and complex surfaces.
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Pour Point -55°C: Retains its liquid properties at low temperatures – suitable for applications in cold environments.
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Surface Tension 20.9 mN/m: Excellent wetting – even spreading as a release coating on molds and dies.
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Food grade compliant with EC 1935/2004 and FDA 21 CFR 173.340: Certified for applications requiring indirect food contact – usable as an anti-foaming agent or lubricant in the food industry.
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Chemically non-reactive: Does not react with addition or condensation silicones, most plastics and elastomers – safe as an additive without undesirable side reactions.
Typical Applications
- Release agent for rubber, polyurethane, epoxy and metal injection molding – durable release film on complex mold surfaces
- Additive to addition and condensation silicones (1–10%) to reduce hardness and increase fluidity
- Anti-foaming agent in non-aqueous systems – effective in small quantities
- Lubricant for plastic and elastomer surfaces – excellent lubricating properties without material degradation
- Electrical insulating fluid and damping fluid in electrical and electronic equipment
- Raw material for cosmetic formulations and personal care products (INCI: Dimethicone)
Processing instructions (as an additive in silicones):
- Weigh the desired amount of component A of your silicone and add component B according to the mixing ratio information sheet.
- Stir the mixture well.
- Add the silicone oil to the silicone mixture and stir again. Vary between 1 and 10% oil by total weight. An addition of approximately 8% reduces the Shore A hardness by about 3 to 5 points.
- Keep the percentage below 10%: more than 10% oil can unacceptably reduce the final strength of the cured silicone.
- Process the mixture within the pot life of your silicone.
⚠️ Note: Silicone oil does not cross-link in the silicone and will slowly leach out under continuous stress or over time, leaving a greasy film on the mold. Please consider this for long-term mold applications.
⚠️ Thermal stability: Polydimethylsiloxane slowly begins to thermally degrade above approximately 150°C, releasing formaldehyde gas, among other things. For applications at temperatures above 150°C, good extraction or ventilation is recommended.
Compliance & Certification
Silicone Oil 100 cSt in the PC grade (food-safe version) complies with EC 1935/2004 and EC 10/2011 for materials in contact with foodstuffs, with FDA 21 CFR 173.340 (anti-foaming agent as a secondary direct food additive), and with the BfR recommendation "XV Silicones". For standard industrial applications, the standard technical datasheet values apply.
Produced by AToro B.V., specialist in high-quality silicones and silanes for industrial and technical applications, based in the Netherlands.
Professional Support
Are you unsure about the correct viscosity for your application, or do you have questions about the usability of silicone oil in a certified food-grade environment? Contact us for technical datasheets, processing manuals, or product advice.
