Silicone Oil 5 cSt – Polydimethylsiloxane for Molds & Industrial Lubrication
Silicone Oil 5 cSt – Polydimethylsiloxane for Molds & Industrial Lubrication
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Premium Chemically Inert Silicone Oil for Professional Mold and Lubrication Applications
Silicone Oil 5 cSt is an extremely low-viscosity, colorless, and chemically inert polydimethylsiloxane (PDMS) fluid with a viscosity of 5 cSt and a density of 0.910 g/cm³ at 25°C. The product has a flash point of 136°C, a pour point of -65°C, and a surface tension of 19.7 mN/m. With the lowest viscosity in the standard PDMS range, Silicone Oil 5 cSt is ideally suited as a super-thin release coating, a penetrating lubricant for the finest mechanisms, and an additive to maximize silicone flowability for optimal degassing. The 5 cSt viscosity offers the highest fluidity and best penetration into very fine and complex surface structures.
Key Benefits
- Viscosity 5 cSt at 25°C: The lowest standard viscosity grade – maximum penetration into fine structures and micropores that higher grades cannot reach.
- Flash Point 136°C: Sufficient thermal stability for room temperature applications – for elevated temperature use, a higher viscosity grade is recommended.
- Pour Point -65°C: Retains its fluid properties in extreme cold – applicable in the most extreme cooling environments.
- Low Surface Tension 19.7 mN/m: Excellent spread as a super-thin release coating – even, minimal film formation on molds and dies.
- Chemically non-reactive: Does not react with addition or condensation silicones, most plastics and elastomers – safe as an additive without unwanted side reactions.
- Colorless and Odorless: Leaves no visible residue – suitable for applications where aesthetic neutrality is required.
Typical Applications
- Super-thin release coating for rubber, polyurethane, epoxy, and metal injection molding – maximum penetration into complex and finely textured surfaces
- Additive to addition and condensation silicones (1–10%) to maximize flowability and facilitate degassing – most effective grade for thin casting silicones
- Anti-foaming agent in non-aqueous systems – effective even in minimal quantities
- Penetrating lubricant for very fine plastic and elastomer mechanisms
- Electrical insulation material in electrical and electronic equipment
- Raw material for cosmetic formulations (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 thoroughly.
- 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% will reduce 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.
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 applicability of silicone oil at elevated temperatures? Please contact us for technical data sheets, processing manuals, or product advice.
Product Properties
- ColorTransparentColor of the finished product
- TransparencyTransparentDegree of transparency
- Viscosity5mPa·sViscosity of the uncured silicone
- Density0.91g/cm³Density of the cured material
Physical Properties
- Flash point136°CMin. temperature at which the product ignites
- Surface tension0.0197N/mSurface tension at 25°C
- Refractive index1.397Refractive index at 25°C
Thermal Properties
- Cold flexibility-65Remains flexible at low temperatures
Electrical Properties
- Electrically insulatingYesPrevents electric current flow
Certification & Safety
- Chemical resistanceResistant to water and weak acids; not resistant to strong acids, bases, and oxidizing agentsResistance to chemicals
- Moisture resistantYesResistant to moisture and water absorption
Application
- Use caseRelease agent, lubricant, defoaming agent, and additive to make silicones maximally fluidIntended use
- Silicone type["Silicone oil","Auxiliary material"]Type of silicone or polymer
Safety Information
Silicone Oil 5 cSt is classified as harmful to aquatic life with long lasting effects (H412, Aquatic Chronic 3) in accordance with Regulation (EC) No 1272/2008. Under normal use, the product poses no acute health hazard: no hazard pictograms or signal words are required. Release of the product into the environment, drains or surface water must be prevented. Recommended personal protective equipment: safety glasses with side shields (EN166) in case of risk of splashes. Note the flash point of 136°C: this is the lowest value in the range. Avoid open flames, sparks and static discharge in the immediate work area. Ensure good ventilation when used in enclosed spaces. Consult the full Safety Data Sheet (SDS) for detailed information on storage, disposal, first aid measures and environmental precautions. The SDS is available via the download button on this page.| Safety Pictograms | Safety Data Sheets (SDS) |
|---|---|
GHS hazard pictograms
Required protection (ISO 7010)
  |
| Signal Word | H‑code | Hazard Statement | P‑codes | P‑statements |
|---|---|---|---|---|
| Warning | H412 | Harmful to aquatic life with long lasting effects | P273 P501 |
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Technical data sheets
Frequently asked questions
What is the delivery time for my order?
Orders placed and paid on working days are in most cases shipped the same day. Weekend orders are processed on the next working day.
Indicative delivery times: Netherlands usually within 1 working day, Belgium and Germany typically 1–2 working days, other countries depending on destination and carrier. These are guidelines, not guarantees: peak periods, public holidays or carrier delays can have an effect.
What is the return policy?
You have 30 days to return after receipt. Email info@siliconesandmore.com within 30 days of delivery with your name and order number. The full conditions are in our return policy.
How can I track my order?
As soon as your order has shipped, you'll receive a track & trace code by email. It can take up to 24 hours before the code is active.
I have a problem with my order – how do I reach you?
Contact us via our contact page or email info@siliconesandmore.com. We're happy to help you quickly.
Can I order as a business?
Yes. Apply for a business account; we review your application within 3 working days. After that you order while logged in and pay on invoice, with payment terms of 14 days after delivery.
EU businesses outside the Netherlands with a valid VAT number order with VAT reverse-charged (0%, intra-community supply). The VAT number is stored in your business account; it cannot be added to an order after it has been placed.