Tin vs. Platinum Cure Silicone: Comparison

Tin vs. Platinum Cure Silicone: Comparison


Understanding the differences between platinum liquid silicone rubber and tin cure silicone rubber is crucial for selecting the appropriate one for your specific application.

In this article, we will compare the properties of platinum liquid silicone rubber and tin cure silicone rubber, including:

  • Toxicity
  • Durability
  • Detail reproduction
  • Temperature resistance
  • Resistance to chemicals and UV radiation

Toxicity: Comparing Toxic vs. Non-Toxic Properties

Tin cure silicone rubber often contains potentially toxic elements such as tin catalysts, which may cause health concerns when used without proper precautions.

In contrast, platinum liquid silicone rubber is a non-toxic alternative that provides a safer working environment, making it ideal for applications where direct contact with the material is necessary, such as lifecasting.

Durability and Longevity

Platinum liquid silicone rubber exhibits superior durability and longevity compared to tin cure silicone rubber. It can withstand repeated use and aging without significant degradation, making it suitable for applications requiring long-lasting molds or prosthetics.

Tin cure silicone rubber, while durable to some extent, may experience faster deterioration over time.

Ability to Capture Details

When it comes to capturing intricate details, platinum liquid silicone rubber excels. Its excellent flow characteristics and low viscosity enable it to replicate fine textures and minute features accurately.

Tin cure silicone rubber, on the other hand, may struggle to capture intricate details with the same level of precision, potentially resulting in less accurate reproductions.

Temperature Resistance

Platinum liquid silicone rubber exhibits exceptional temperature resistance, allowing it to withstand both high and low temperatures. This property makes it suitable for applications such as mold making for casting materials that require elevated curing temperatures.

Tin cure silicone rubber, while heat-resistant to some degree, may not perform as reliably under extreme temperature conditions.

Resistance to Chemicals, Acids, and UV Radiation

Platinum liquid silicone rubber offers superior resistance to chemicals, acids, and UV radiation. It can withstand exposure to a wide range of chemicals, including solvents and acids, without experiencing significant degradation or loss of physical properties.

Tin cure silicone rubber may be more susceptible to damage when exposed to certain chemicals or UV radiation.

Other Properties and Considerations

Platinum liquid silicone rubber possesses additional noteworthy properties such as excellent tear resistance, high elongation, a longer working time, and shorter curing time compared to tin cure silicone rubber. These properties make it well-suited for complex mold making projects that require flexibility and extended workability. 


Platinum liquid silicone rubber offers advantages in terms of non-toxicity, durability, detail reproduction, temperature resistance, and resistance to chemicals and UV radiation.

However, tin cure silicone rubber may have its merits in certain applications, including lower cost. It is crucial to assess the specific needs and considerations of your project to make an informed decision on which material to choose.

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