The amount you can compress silicone depends on the specific application, but an optimal range is commonly recommended for effective use.
According to optimal compression guidelines, the sweet spot for compressing silicone is between 35% and 40%. This range is considered ideal for both sponge and solid silicone rubbers, ensuring good sealing performance without over-compressing the material.
Optimal Compression Range
While silicone can technically be compressed beyond this range (potentially up to its point of failure or permanent deformation), compressing silicone within the 35%-40% window offers several benefits:
- Effective Sealing: Provides sufficient contact pressure to create a reliable seal against dust, liquids, or gases.
- Material Longevity: Reduces the risk of permanent set (material not returning to its original shape) and premature wear.
- Predictable Performance: Ensures the silicone gasket or component functions consistently over time and temperature changes.
The provided reference highlights this range:
The ideal amount of compression will depend on the specifics of your application. Even so, it is commonly agreed that the sweet spot for compression is between 35% and 40% for both sponge and solid silicone rubbers.
Here's a simple breakdown based on typical recommendations:
| Silicone Type | Optimal Compression Range |
|---|---|
| Sponge Rubber | 35% - 40% |
| Solid Rubber | 35% - 40% |
Note: This optimal range is a guideline for achieving effective sealing and maximizing material life, not necessarily the absolute maximum compression the material can withstand before failure.
Practical Considerations
When designing applications using silicone, aiming for compression within this optimal range is crucial. Exceeding it can lead to:
- Increased compression set
- Reduced lifespan
- Potential cracking or tearing
On the other hand, compressing too little (e.g., below 10-20%) might result in inadequate sealing.
Engineers often design enclosures or components to limit the compression applied to silicone seals or gaskets, ensuring they fall within the recommended 35-40% range for best performance and durability.
