As a versatile chemical substance, dimethicone has a wide range of viscosity and has different application scenarios from low viscosity to extremely high viscosity. Choosing the right viscosity is critical to the effectiveness of dimethicone as a defoaming agent.

Viscosity selection of dimethyl silicone defoamer
The viscosity range of dimethicone defoamer can range from 5-1000000 centistokes (mm²/s). Dimethicone fluids of different viscosities are suitable for different scenarios and needs:
Low viscosity (5-50 centistokes): suitable for systems that require rapid diffusion and defoaming, such as water-based systems. Low viscosity dimethicone can quickly diffuse in the system and quickly reach the foam surface to exert a defoaming effect.
High viscosity (1000-1000000 centistokes): suitable for oily systems or systems with high durability requirements. High-viscosity dimethicone can maintain the defoaming effect for a longer period of time in these systems, and can better exert its chemical stability and other properties in oily environments.

Application scenarios of dimethyl silicone oil with different viscosities
Low viscosity dimethicone
Application scenarios: water-based systems, rapid defoaming requirements.
Advantages: easy to spread, can quickly reach the foam surface, and quickly defoaming.
High viscosity dimethicone
Application scenarios: oily systems and situations where long-lasting defoaming is required.
Advantages: Good durability and can function stably in oily environments.
Mixing dimethicone fluids of different viscosities
For best results, mix a low-viscosity silicone oil with a high-viscosity silicone oil. For example, mixing three parts of dimethicone with a viscosity of 100 cSt and one part of dimethicone with a viscosity of 12,500 cSt can achieve better defoaming effects in certain application scenarios.
Things to note
Adding amount: The recommended dosage is between 0.001-0.003. The specific dosage should be adjusted according to the actual application scenario.
Conditions of use: Dimethyl silicone defoamer has good water solubility, can be quickly dispersed in water, and has good chemical stability, and is suitable for use in high temperature, strong acid and alkali environments.
In summary, choosing the right viscosity is crucial to the effectiveness of dimethicone as a defoaming agent. Depending on the specific application scenario and needs, you can choose low or high viscosity dimethicone, or achieve the best results by mixing silicone oils of different viscosities.]