What Is the Difference between Silicone Resin and Silicone Rubber

As much as we can get both silicon resin and silicon rubber from the same silicon-based compounds, they differ in many aspects.

We are going to have a critical analysis of how they compare from their physical properties to application.

What Is Silicon Resin?

Silicone Structure
Silicone Structure

We can describe this synthetic polymer using its silicon and oxygen (Si-0) bonds that can combine with other organic compounds on silicon atoms.

Their unique three-dimensional structural properties make them extremely stable and highly versatile in their applications.

What Is Silicon Rubber?

This is a rubber-like elastomer that is chemically composed of a silicone polymer that is combined with other molecules such as carbon, hydrogen and oxygen. Silicone rubber unique molecular structure grants them unique features such as durability and a very high resistance to extreme temperatures.

Differences Between Silicone Resin And Silicon Rubber

Now that we have a clear picture of the difference between these two, we can dive straight into how the two differ. We are going to critically analyze both physical and chemical properties of the two and how they compare.

Silicon Resin Silicon Rubber
Chemical composition A cross-linked network composed of silicon and oxygen Chain-like structure of silicon and oxygen which can either be linear or slightly branched
Structure Three-dimensional structure that has a rigid network Soft and flexible structure that is elastic
Temperature tolerance Ranges between -50°C to about 200°C Ranges between -60°C to around 250°C
Resistance to weather They can withstand UV radiation and extreme weather conditions They can withstand UV radiation and any form of environmental ageing
Mechanical properties They are very rigid and highly brittle Have high elasticity with good flexibility
Durability It is very durable and extremely stable in harsh conditions They extremely durable and highly resilient when exposed to mechanical stress
Applications We use them in encapsulations, protective coatings. Insulation and in adhesives We use them in making gaskets, various medical devices, flexible connectors and hose tubings
Cost A bit pricey based on their specialized applications There is a variation in price but is usually cost-effective for your different applications
Processing Its process requirements involve special formulations and curing conditions Their curing techniques makes processing very easy and efficient
Curing They have to cure under heat Curing takes place at room temperature with or without heat
Chemical resistance Displays very high resistance to various chemicals Fairly good resistance to various solvents and chemicals

You now clearly understand some of the key differences between silicon rubber and silicon resin. We have showcased their unique properties and you can apply either of the two in your various industry applications.


With its rigid nature and thermal stability, you can easily apply silicon resins in electrical insulations or encapsulating materials for insulation. On the contrary, silicone rubber thrives on its elastic and flexible nature that makes it ideal for gasket and medical device applications that rely on mechanical resilience.

More resources:

What are the Different Processing Methods for Silicone Rubber – Source: LEGENDAY

Understanding UL94v-0: Silicone Rubber – Source: LEGENDAY

Polyurethane vs Silicone Rubber – Source: LEGENDAY

Are Silicone Rubber Buttons Good for You? – Source: LEGENDAY

What is Silicone Rubber Calendering – Source: LEGENDAY

Silicone-based Paints and Coatings – Source: LEGENDAY


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