Polydimethylsiloxane (PDMS) Viscosity Guide & Application Overview

Dimethicone (PDMS) Viscosity Guide & Application Overview

 Product Overview

Dimethicone (PDMS) is a versatile organosilicon polymer well known for its exceptional chemical stability, low surface tension, thermal resistance, and biocompatibility. Its viscosity varies across a wide range, offering tailored solutions across different industrial uses.

Viscosity classification of Dimethicone

PDMS can prepare silicone fluids with different viscosities according to its degree of polymerization and different processing techniques. The common PDMS viscosities are Dimethicone 10 cSt, Dimethicone 50 cSt, Dimethicone 100 cSt, Dimethicone 350 cSt and Dimethicone 1000 cSt, etc.. Each viscosity of PDMS has its own special properties and application areas.

Factors affecting Dimethicone viscosity

The viscosity of Dimethicone  is affected by many factors, including molecular weight, molecular structure, degree of polymerization, and temperature. Generally speaking, the higher the degree of polymerization and the higher the molecular weight, the higher the viscosity, and an increase in temperature will reduce its viscosity.

Viscosity Grades & Recommended Applications

Technical Specifications

• Structure: [-Si(CH₃)₂O-]ₙ

• Viscosity Range: 5 ~ 1,000,000+ cSt

• Appearance: Colorless transparent liquid (low/mid viscosity), semi-flow or gel (high viscosity)

• Density (25°C): 0.96–0.98 g/cm³

• Refractive Index (25°C): 1.400–1.410

• Customizable End Groups: -OH, -CH₃, -Vinyl

Procurement Tips

1. Target Industry & Use Cases (e.g., personal care, coatings, electronic encapsulation)

2. Viscosity Grade & Temperature Stability

3. Formulation Compatibility of Final Product

Polydimethylsiloxane has good chemical stability and physical properties, and its viscosity is also one of the important parameters affecting its properties and application areas. PDMS with different viscosities are applied in different fields and have unique performance performance. Understanding the difference of Dimethicone viscosity and its influence will help us to better select and apply this silicone compound. 

Ecovia  supplies Dimethicone (Dimethyl Silicone Fluid) grades from 5cSt to over 1,000,000cSt with customizable end groups and packaging options, meeting the high-performance needs of global buyers in the chemical industry.