Wacker AK 35 - Linear Silicone Oil for Release Agents and Lubricants

Premium Linear Silicone Oil for Professional Release Agent and Lubricant Applications

WACKER® AK 35 is a linear, non-reactive polydimethylsiloxane (PDMS) fluid with a kinematic viscosity of approximately 35 mm²/s at 25°C. As a pure PDMS oil, this product distinguishes itself from organic mineral oils by an exceptionally stable property profile over a wide temperature range, from a -60°C pour point to a flash point of over 205°C. WACKER® AK 35 is colourless, odourless and highly chemically inert, making it suitable for a wide range of industrial and technical applications where high purity, low surface tension and reliable performance are required.

Key Benefits

• Viscosity 35 mm²/s at 25°C: Stable fluidity with minimal change over a wide temperature range – ideal for processes where consistent flow properties are essential.
• Flash Point >205°C (ISO 2719): Excellent thermal safety in processing environments with elevated temperatures – reduced fire risk compared to mineral oils.
• High Chemical Inertness: Does not react with most substrates and process chemicals – protects the process and extends the service life of moulds and equipment.
• Low Surface Tension (0.021 N/m): High surface activity ensures excellent spreading on complex geometries and effective separation between mould and product.
• Pour Point -60°C: Maintains liquid properties at low temperatures – suitable for applications in cold environments and cryogenic process lines.
• No Hazardous Classification (GHS/CLP): Not classified as a hazardous substance – simplifies REACH compliance, storage and transport (no ADR classification).

Typical Applications

• Release agent for rubber, plastic and composite moulds – prevents adhesion without leaving residues on the final product
• Lubricant for plastic-on-plastic and plastic-on-metal contacts and for rubber seals and O-rings
• Antifoaming agent in industrial production processes, paints and varnishes
• Dielectric fluid for electrical and electronic equipment such as transformers and switches
• Heat transfer fluid in closed systems with a temperature range from -60°C to above 200°C
• Additive for polishes, textile and fibre auxiliaries and surface treatments

Processing Instructions:

1. Before use, check that the fluid is clear and free of contaminants.
2. Apply the product by brush, cloth, spray or immersion depending on the application. When used as a release agent: apply a thin, even layer to the mould surface.
3. When atomising or spraying: ensure adequate ventilation and wear a half-mask respirator (FFP1) if necessary.
4. Avoid mixing with water or short-chain alcohols – WACKER® AK 35 is immiscible with polar solvents. When using with solvents: first perform a small-scale test.
5. Store the product in a dry, cool environment at a maximum of 50°C, away from direct sunlight and flames.

Produced by Wacker Chemie AG, a global market leader in the development and production of silicones for industrial and technical applications.

Professional Support

WACKER® AK 35 is available in multiple packaging sizes and can be mixed with other AK silicone oils to custom-adjust the desired viscosity. Please contact us for technical datasheets, application advice or information on specific viscosity variants.