expanSil™ Silicone Sponge Extrusions
Access proven silicone sponge extrusion families for broad-use sealing, high-temperature environments, aerospace and specification-driven requirements, flame-critical applications, long-life sealing, and food-contact needs. Through our preferred supplier relationship, SRP helps customers identify the right expanSil™ material family and source it for the demands of the application.
Why Source expanSil™ Through SRP
When buyers are evaluating silicone sponge extrusion options, the challenge is often not finding a material name — it is identifying the right family for the application. SRP helps simplify that process by supporting family selection around heat, flame performance, specification requirements, service life, and food-contact needs.
- Responsive quoting for new and replacement opportunities
- Help choosing the right expanSil family for the application
- Access to proven material families through our preferred supplier
- Support for heat, flame, aerospace/spec, and hygienic requirements
Why Engineers Choose expanSil™ Silicone Sponge Extrusions
expanSil silicone sponge extrusions are selected for reliable sealing, environmental resistance, and long-term performance across a range of demanding applications.
- Regulatory-compliant material options, including food-contact, flame, aerospace, and specification-driven grades
- Consistent performance across grades and densities
- Low compression set for long-term sealing reliability
- Wide operating temperature range for demanding environments
- Excellent resistance to ozone, UV, and weathering
- Closed-cell construction for effective sealing and low water absorption
Choose the expanSil™ Family That Fits Your Application
From broad-use sealing to high-heat, aerospace/spec-driven, flame-critical, long-life, and food-contact applications, expanSil silicone sponge extrusions are available in specialized families to match the demands of the job.
expanSil™ Family Comparison Guide
| expanSil Family | Best Fit | Why It Stands Out | Key Specs | Available Grades |
|---|---|---|---|---|
| GP | Broad-use industrial and commercial sealing | General-purpose closed-cell silicone sponge with a wide density range | -60°C to 230°C; UL94 HB; FAR 25 / JAR 25 | GP200, GP250, GP350, GP400, GP450, GP530 |
| THT | High-heat environments | Enhanced temperature resistance for sealing, insulation, and gap filling | -60°C to 270°C; UL94 HB; FAR 25 / JAR 25 (horizontal) | THT200, THT250, THT350, THT400, THT530 |
| US2D | Aerospace and defense | ASTM D1056 2D grades with AMS-approved options in the broader family | -60°C to 230°C; ASTM D1056 2D1–2D4; AMS 3195 / 3196 options | US2D1, US2D2, US2D3, US2D4 |
| V-0 | Flame-critical applications | High flame resistance with low smoke toxicity | -60°C to 230°C; UL94 V-0 | Super-Soft, Soft, Soft-Medium, Medium, Medium-Firm, Firm |
| FR | High-temperature seals needing added flame resistance | Flame-retardant option when added fire resistance is needed | -60°C to 230°C; UL94 V-1; FAR 25 (Vertical) | FR200, FR250, FR400, FR530 |
| XR | Long-life sealing where replacement is difficult | Ultra-low compression set for extended service life | -60°C to 230°C; UL94 HB; FAR 25 / JAR 25 (Horizontal) | XR Medium, XR Medium-Firm, XR Firm |
| FDA | Food, beverage, and pharmaceutical sealing | Food-grade closed-cell silicone sponge for direct food contact applications | -60°C to 230°C; FDA; BfR XV; EC 1935/2004 | FDA350, FDA Medium |
Explore expanSil™ Formulations
A broad range of silicone sponge extrusion families engineered for sealing, insulation, and long-term performance across demanding applications.
expanSil™ Silicone Sponge Extrusion Products
expanSil silicone sponge materials are available through our preferred supplier in a range of extrusion formats to support sealing, insulation, and environmental protection requirements.
expanSil™ Silicone Sponge Cord
Silicone sponge cord is a strong fit for sealing applications that need dependable compression, environmental resistance, and performance in harsh conditions. Cord is often used in cut-to-length seals and joined-ring style gasket applications.
expanSil™ Silicone Sponge Profile
Silicone sponge profiles are a good fit when the sealing surface, enclosure geometry, or profile requirement calls for more than a standard cord or section. Profiles can support simple through complex sealing shapes across a wide range of applications.
expanSil™ Silicone Sponge Sections
Square and rectangular sponge sections support channel seals, perimeter seals, and other applications where a defined sealing surface is needed. Specialty options are available depending on the application requirement.
expanSil™ Silicone Sponge Tubing
Closed-cell silicone sponge tubing is available in general-purpose and specialty formulations for applications that need compressible sealing in a tubular format.
Custom expanSil™ Silicone Sponge Extrusions
By working closely with the customer we firstly assess the application and problem (if any) that is being experienced. We can then design the profile needed to perform and also the correct silicone grade to fit the application. Following production of a prototype, the design will be tested to ensure the product performs exactly as specified.
Need Help Sourcing the Right expanSil™ Extrusion?
Tell us about your application, operating environment, required format, and any heat, flame, aerospace, or food-contact requirements. SRP can help narrow the right expanSil family and support the sourcing process through our preferred supplier.