Silicone Products Silicone Sponge Rectangles

Bellofram’s silicone sponge rectangles offer a dependable and customizable solution for sealing, gasketing, cushioning, and insulating across a variety of industries. These extruded profiles are designed for flexibility and long-term performance, especially in environments where temperature extremes and material reliability are critical.

Precision Silicone Rectangle Extrusion for Custom Applications

Manufactured through precise silicone rectangle extrusion, these profiles combine the thermal and mechanical advantages of silicone with the compressibility and low water absorption of closed cell sponge. We offer roll material with any combination of thickness and width — up to a 12” usable width — allowing you to source material tailored to your specific application. Whether you need a narrow strip for a door seal or a wide profile for larger assemblies, we can produce it to spec.

Options for Extruded Sponge Rectangles

Our extruded sponge rectangles are available in a range of density grades — from soft to firm — enabling engineers and designers to select the appropriate level of compression resistance and cushioning. Each density type is manufactured in-house using custom silicone formulations, giving you flexibility without sacrificing consistency or quality.

Bellofram’s silicone foam rectangles are suitable for use in a wide range of environments thanks to their broad temperature tolerance. These materials can operate continuously from -85°F to +400°F without loss of physical integrity, making them ideal for indoor or outdoor use, even in thermally demanding or fluctuating conditions.

All of our extruded foam rectangles can be manufactured to meet key industry standards. Flame-retardant versions are available that comply with UL 94 V-0 and UL HB, which are essential for applications requiring enhanced fire safety. We also offer FDA grade and NSF 51 certified options for food and beverage, pharmaceutical, or medical device applications. These certifications ensure the materials used are safe for contact with consumables or sensitive environments while maintaining their physical performance.

Whether used for gasketing in HVAC systems, insulation in electrical enclosures, or cushioning in automotive or aerospace components, Bellofram’s silicone sponge rectangles provide the flexibility, durability, and compliance needed for complex design requirements.

Custom Silicone Rectangle Extrusion Solutions

Custom colors and formulations are available to meet visual, functional, or regulatory specifications. With our broad in-house capabilities, Bellofram is ready to support your needs for high-quality silicone rectangle extrusion that performs reliably in critical applications.