Silicone Oil 1000 cSt – Polydimethylsiloxane for Moulds & Industrial Lubrication

Premium Chemically Inert Silicone Oil for Professional Mould and Lubrication Applications

Silicone Oil 1000 cSt is a moderately viscous, colourless, and chemically inert polydimethylsiloxane (PDMS) fluid with a viscosity of 1000 cSt and a density of 0.970 g/cm³ at 25°C. With a flash point over 300°C, a pour point of -50°C, and a surface tension of 21.2 mN/m, Silicone Oil 1000 cSt provides a robust, durable film with excellent damping and lubricating properties. The 1000 cSt viscosity is ideally suited for applications requiring a long-lasting lubricant or release film, as a damping fluid in mechanical systems, and as a heavier additive to substantially soften silicones. Food-grade version (PC grade) available in accordance with EC 1935/2004 and FDA 21 CFR 173.340.

Key Benefits

• Flash Point >300°C: High thermal stability – safe for continuous use at elevated temperatures in industrial processing and lubrication applications.
• Viscosity 1000 cSt at 25°C: Thick-flowing with high film retention – stays on vertical and complex surfaces longer than lower grades.
• Pour Point -50°C: Retains its liquid properties at low temperatures – suitable for applications with large temperature fluctuations.
• Surface Tension 21.2 mN/m: Excellent wetting – forms an even, durable protective film on moulds and machine parts.
• Food grade compliant with EC 1935/2004 and FDA 21 CFR 173.340: Certified for applications requiring indirect food contact – can be used as an anti-foaming agent or lubricant in the food industry.
• Excellent Damping Properties: High viscosity absorbs vibrations and mechanical shocks – suitable as a damping fluid in hydraulic and mechanical systems.

Typical Applications

• Release agent for rubber, polyurethane, and epoxy – durable release film that remains on complex mould surfaces for a long time
• Additive for addition and condensation silicones (1–10%) to substantially reduce hardness
• Damping fluid in mechanical and hydraulic systems – high viscosity provides excellent shock and vibration damping properties
• Lubricant for heavily loaded plastic and elastomer contacts – long-lasting lubricating film
• Electrical insulating agent and damping fluid in electrical and electronic equipment
• Anti-foaming agent in industrial processes – effective in non-aqueous systems

Processing Instructions (as an additive in silicones):

1. Weigh out the desired amount of your silicone's A-component and add the B-component according to the mixing ratio datasheet.
2. Stir the mixture thoroughly.
3. Add the silicone oil to the silicone mixture and stir thoroughly – the higher viscosity requires a bit more mixing force than lower grades. 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.
4. Keep the percentage below 10%: more than 10% oil can unacceptably reduce the final strength of the cured silicone.
5. Process the mixture within your silicone's pot life.

Conformity & Certification

Silicone Oil 1000 cSt in PC grade (food-safe version) complies with EC 1935/2004 and EU 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 as a damping fluid or in a food-grade environment? Contact us for technical datasheets, processing manuals, or product advice.