Your Guide to Sourcing Custom Silicone Sponge Extrusions

What’s the most critical element of product design? It often comes down to the materials and how well they support the application.

That’s why SRP is excited to announce we now have direct access to a specialized manufacturer of silicone sponge extrusions: ​​expanSil™ by Silicone Engineering. 

To learn more about the features and available products in the expanSil line, visit our dedicated page, which provides all the key details. 

Why use customized silicone sponge extrusions? 

What’s the advantage of sourcing silicone sponge extrusions through SRP? 

Customization: You can customize it and get exactly what you need. Thanks to our direct access to expanSil™ products, all your silicone sponge extrusions are made-to-order. You can select from a wide range of shapes, widths, and colors to perfectly suit your application.

Higher quality: When material quality is essential, sourcing your silicone extrusions from SRP offers a superior alternative to off-the-shelf products. Unlike purchasing stock items, you’ll have sponge extrusion that meet your exact specifications and are manufactured by a company with a strong reputation for quality control. 

Supply chain stability: Customization ensures enhanced reliability and performance, while also reducing the risk of supply disruptions. By working with SRP for your custom extrusions along with all your other custom converted materials, you’ll streamline your vendor relationships. With fewer vendors comes better pricing and improved efficiency.

How to get a quote for custom silicone extrusions 

To help you begin your order with SRP, use our checklist on what you need to know for a smooth, hassle free process. 

For custom silicone extrusions, the order process will depend on whether you’re working with an existing formulation or if you’re seeking a new formulation for a new application. 

What do I need to get a quote on an existing extrusion? 

For a fast and accurate quote from SRP, please provide the following information: 

1. A drawing (if available)
2. Material specifications
3. Color requirements 
4. Length requirements 
5. Per purchase quality and frequency
6. Estimated Annual Usage (EAU) to help secure the best freight rates
7. Current packaging method (e.g., coiled, boxed, reel or bagged)

Additional tips for hassle-free ordering 

• When quoting for tubing, providing the Inner Diameter (ID) and wall thickness — rather than the ID and Outer Diameter (OD) — ensures the tubing remains concentric, maintaining a uniform wall thickness. This consistency is essential for structural integrity and reliable performance.
• For extended rolls, material splicing is available to join pieces into a continuous length.
• Note: Silicone Engineering does not extrude shapes with inserts (e.g., wire, metal), dual durometer shapes, or any EMI/RFI conductive materials.

What do I need to get a quote on a new extrusion? 

If you’re sourcing a custom silicone extrusion for a new application, we’ll need a few additional details beyond the basics to get you an exact match:

1. A drawing 
2. A description of the application 
3. Material specifications including
   • Hardness 
   • Compression set 
   • Closure force 
   • Solid or sponge 
   • Adhesive (if needed)
4. Environmental conditions, including:
   • Operating temperature 
   • Chemical resistance 
5. For lighting applications: Light housing lens material (to assess outgassing) 

Your quote will include a recommended material based on an analysis of the information you provided, along with relevant data sheets and cross-sectional tolerances.

SRP: Your Complete Resource for Custom Materials and Components 

Whether you’re seeking a new vendor for silicone sponge extrusion or identifying the best formulation for a new application, our team is here to help. Get started by filling out our online form for your fast and accurate quote today.