General Purpose Silicone Sponge Extrusions
expanSil™ GP
General-purpose closed-cell silicone sponge extrusions for flexible sealing across a wide range of densities
expanSil™ GP is a versatile family of general-purpose, closed-cell silicone sponge extrusions for flexible sealing in applications that require environmental resistance, dependable performance, and long service life. Through our preferred supplier relationship, SRP helps customers identify the right GP grade and source the material for broad-use industrial and commercial sealing applications.
With a wide density range and strong resistance to ozone, UV, and weathering, expanSil GP is a dependable starting point when the application needs reliable silicone sponge performance without requiring a more specialized family.
Why Choose expanSil™ GP
expanSil GP combines the versatility of a general-purpose silicone sponge extrusion family with the performance advantages needed for reliable long-term sealing across a wide range of environments.
- General-purpose, closed-cell silicone sponge extrusion family
- Available in a wide range of densities to match sealing force requirements
- Operating temperature range from -60°C to 230°C (-76°F to 446°F)
- Excellent resistance to ozone, UV, and environmental exposure
- Flame-retardant performance meeting UL94 HB and FAR 25 / JAR 25 requirements
- Low water absorption for improved environmental sealing
- Suitable for flexible sealing, gap filling, and joined gasket designs
- Available with pressure-sensitive adhesive (PSA) backing
- Offered as tubes, cords, profiles, strips, sections, joined rings, and gaskets
Common Applications for expanSil™ GP
expanSil GP is commonly considered for applications that need dependable closed-cell sealing performance across varying environments and operating conditions.
- Joined gasket assemblies
- Gap fillers and flexible seals
- Environmental and weather-resistant enclosures
- High-temperature sealing applications
- General-purpose sealing across industrial and commercial equipment
- Applications requiring a balance of flexibility and sealing force
Available GP Grades
expanSil™ GP is available in a range of grades to support different density and sealing-force requirements. Review the options below to find the best fit for your application.
Data Sheets
Need Help Sourcing the Right expanSil™ GP Grade?
Tell us about your application, operating temperature, sealing geometry, environmental exposure, and any current material or part number you are replacing. SRP can help narrow the right GP grade and support the sourcing process through our preferred supplier.
Share your application details, performance requirements, existing part information, or a drawing, and our team will review your request and follow up with next steps.
RELATED BLOGS
Need Help Sourcing expanSil™ GP?
Tell us about your application, operating temperature, sealing geometry, environmental exposure, and any current material or part number you are replacing. Our team will review your request and follow up with next steps.