Across a wide variety of applications, both PORON® Urethane and BISCO® Silicone foams offer the Compression Set Resistance (C-set) to maintain reliable pressure force to fill and seal gaps consistently, withstanding collapse caused by the stresses of compression and temperature over time. These superior gap filler foams are flexible yet reliable, offering long-term durability to fill gaps caused by variations in manufacturing tolerances or environmental changes that may occur in a broad range of operating conditions.

Aircraft Interiors

Whether you ned to fill gaps between components in commercial new build, regional jet, business jet, MRO, or VIP aircraft, Rogers delivers the safest, most reliable foam for your gap-filling application. BISCO® Silicones are approved to Federal Aviation Regulations (FAR) for aircraft interiors, providing consistent gap filling across temperatures ranging from -55°C to 200°C, and are specified to many OEM material specifications including Boeing and Airbus. BISCO® silicone gap fillers provide superb flame resistance and fire protection, along with superior compression set resistance, delivering a safe and reliable fit for critical gap-filling applications.

Automotive Interiors and Exteriors

From bumper to bumper and roof to underside, PORON® Cellular Urethanes and BISCO® Cellular Silicones provide superior gap filling solutions for door panels, instrument panels, HVAC systems, engine compartments, fuel systems, lighting enclosures and more in automotive applications. Flexible gap fillers often function to seal out water and dust, reduce noise, shock, vibration and provide long-term gap filling in both standard automotive and hybrid electric applications. Both material families meet or exceed many automotive specifications.

Hybrid Electric Vehicle Battery Packs

Battery cells in HEV battery packs expand and contract as they charge and give off energy, so the gap filling material needs to withstand hundreds of thousands of cycles in synchronization with the cells’ actions. PORON® Cellular Urethanes and BISCO® Cellular Silicones offer low C-set, allowing the materials to maintain effectiveness as a gap filler while withstanding the continuous cycling of the cells.

Industrial Applications

In industrial enclosures, motor mounts, HVAC units and more, PORON® Urethane foams have a unique ability to produce a very consistent level of force across a range of compressions in gap filling applications. This allows the designer to predict the material’s behavior across varied dimensional tolerances.  When an even wider range of environmental or temperature conditions must be met, BISCO® Silicone foams withstand collapse caused by the stresses of compression and temperature over time.

Portable Electronics

Today’s thin, portable devices are extremely sensitive to even slight manufacturing variations and tolerances. That’s why designers rely on PORON® Urethanes offered in a broad portfolio of thin, compressible gap filler options for phones, tablets and other devices. The PORON® Urethanes Gap Filling Tool will assist you in identifying the proper PORON materials for your gap filling applications.

Railcar Gap Filling

Railcar designers choose BISCO® Silicones for long-term gap-filling performance for railcar systems and components. For electrical enclosures, roof mounts, lighting, HVAC and a wide variety of applications, BISCO silicones meet or exceed rail industry specifications and standards while providing highly consistent gap filling to prevent squeaks, leaks, rattles and vibration noise. These silicone gap-filling materials offer outstanding durability and fire resistance, meeting the fire standards for low flame, low toxicity that are critically important for passenger safety.

Related Products

BF-1000 Very Soft Silicone Foam

Rogers BF-1000 Extra Soft Cellular Silicone offers the compressibility, softness and durability needed for various sealing and cushioning applications.

EC-2130 Silicone EMI Shield

Rogers BISCO EC-2130 electromagnetic shields are electrically conductive silicones used to reduce EMI and RFI.

EC2265 Electrically Conductive

Rogers BISCO EC2265 Electrically Conductive Silicone dissipates heat from electrostatic discharge.

Flame Resistant Sponge Silicone

Rogers BISCO Flame Resistant Sponge Silicones are closed cell silicone sponge sheet materials designed for flame resistant applications.

FPC Silicone Fire Barrier

Rogers BISCO FPC Fire Protective Covering is a patented specialty silicone foam designed to resist flame burn-through at extremely high temperatures.

HT-1200 Series Silicone Rubbers

Rogers BISCO HT-1200 series of general purpose silicone rubbers are firmer in nature, ideal for use in general industrial type applications.

HT-6000 Series Silicones

Rogers BISCO HT-6000 series of performance solid silicones offer enhanced sealing capabilities for medical and industrial appliance applications.

HT-800 Medium Silicone Foam

Rogers BISCO HT-800 Medium Cellular Silicone offers the lightness of foam with the enhanced sealing capabilities of sponge rubber.

HT-820 Firm Silicone Foam

Rogers BISCO HT-820 Firm Cellular Silicone provides enhanced durability and sealing in a wide range of environmental conditions and applications.

HT-840 Extra-Firm Silicone Foam

Rogers BISCO HT-840 Extra Firm Cellular Silicone provides enhanced durability with the excellent sealing properties of sponge rubber.

HT-870 Soft Silicone Foam

Rogers BISCO HT-870 Soft Cellular Silicone is a firmer, denser version of our BF-1000 Silicone and offers the ability to seal and cushion within a wide range of applications.

IF-200 Tear Resistant Foam

Rogers BISCO IF-200 foam is an abrasion-resistant material that can withstand harsh environments with minimal risk of tearing.

MF1® Bun Silicone

Rogers BISCO MF1 Bun silicone offers superior durability and fire resistance in a wide range of cushioning applications.

MS Medical & Life Science Series

Rogers BISCO MS Medical & Life Science Series is a suite of high-performance silicone foams and solids for medical and life science applications.

PORON® Industrial Polyurethanes

Rogers line of PORON® Industrial Polyurethanes provide durable, long-term performance in industrial applications.

RF-120 Silicone Heat Shield

Rogers BISCO RF-120 silicone is a specialty reflective foam capable of both insulating against heat and reflecting it away.


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