Silicone Products Silicone Sponge Profiles

Bellofram’s silicone sponge profiles are engineered for demanding sealing applications that require both complex shapes and superior flexibility. Manufactured through precise silicone sponge extrusion, our closed cell silicone sponge profiles offer consistent performance and durability in extreme environments. Whether you need a simple cord or a custom profile with intricate geometry, Bellofram provides the solution.

We offer a wide range of extruded silicone sponge profiles to meet diverse application needs. Standard shapes include rectangles, tubes, and silicone sponge cords, as well as more specialized configurations like U-profiles, P-profiles, double-P-profiles, D-profiles, T-profiles, and E-profiles. Our full in-house die-making capabilities allow us to create both standard and highly customized profiles to fit your exact sealing or gasketing requirements.

Formulated for durability and flexibility, our extruded silicone foam products are manufactured using proprietary in-house silicone mixing. This enables us to offer profiles with a broad range of compression deflection ratings — from ASTM D 1056 2D1 (soft density) to ASTM D 1056 2D5 (extra firm density). Each profile is capable of withstanding continuous temperatures from -85°F to +400°F, making them well-suited for applications exposed to thermal extremes.

A notable feature of these custom silicone sponge profiles is their self-forming skin, which enhances resistance to water absorption and environmental elements. This makes them ideal for sealing enclosures, absorbing vibration, insulating components, or providing cushioning in outdoor or high-humidity settings.

Our silicone foam extrusions are designed to meet a range of regulatory and industry-specific standards. Flame-retardant versions are available in every density, compliant with UL 94 V-0, UL HB (horizontal burn), and other flame-resistance standards. For food and beverage or medical applications, we offer fully certified NSF and ANSI 51 versions made with FDA compliant materials. We’re also a certified supplier of BMS 1-23 and BMS 1-60 products for aerospace use, giving engineers confidence in material performance and traceability.

To accommodate branding, assembly, or aesthetic preferences, our silicone sponge extrusion products are available in any color. This customization helps products integrate more seamlessly into your end-use application, both functionally and visually.

With industry-proven performance, broad customization options, and compliance with critical certifications, Bellofram’s extruded silicone sponge profiles deliver reliability, flexibility, and sealing performance for the most complex and critical applications.