Norseal Silicone Rubber Solutions

The Norseal Silicone Advantage

Saint-Gobain® Norseal Silicone Rubber is a family of high-performance products featuring a unique chemical structure that provides high temperature stability and general inertness unavailable in any other elastomer. As a result, Norseal Silicone Rubber works in applications where no other material can be used. These high performing products are frequently used in a variety of applications and many markets including military, aerospace, electronics, life science, transportation, LED lighting, electric vehicles (EV) and packaging.

Silicone Features & Benefits

  • Silicone offers a very unique combination of properties not possible in other materials, including
    high temperature resistance combined with low compression set and a non-stick surface. Silicone
    is the only material that can satisfy these specifications.
  • Extreme temperature resistance ensures all inherent properties are maintained and material
    remains elastomeric over a wide temperature range of -100°F to +500°F.
  • Weather, moisture, ozone, UV and fungus resistance mean extended service life in outdoor
  • Superior compression set resistance results in quick recovery in gasketing applications.


  • Aerospace
  • Rail
  • Electronics
  • Lighting
  • Industrial
  • Military
  • Life Science
  • Food Industry
  • Automotive-Electric Vehicle


Norseal Silicone Rubber is odorless, tasteless and non-toxic. It contains no acid-producing chemicals; therefore, is non-corrosive and non-staining. Silicone Rubber has excellent
weatherability because it is unaffected by sunlight, ozone and/or extremely moist or dry conditions and will not support the growth of fungus. The service life of Norseal Silicone Rubber in room temperature applications is virtually unlimited.

Thermal Stability

Silicone’s physical properties are not adversely affected by prolonged exposure to temperatures from -100°F to +500°F. In addition, it can withstand intermittent exposure to even higher temperatures (Time/Temperature Resistance). Silicone far outdistances other elastomers in resistance to thermal degradation and outperforms in general service life, compression set resistance, electrical strength and non-stick properties. Silicone also delivers good chemical and fluid resistance. Although it may swell in contact with some solvents, the rubber will return to its original dimensions, usually without permanent deterioration after the solvent has evaporated. At elevated temperatures, Norseal Silcone Rubber will outgas far less than other silicone elastomers. If they should burn, they will produce a non-conductive white ash and odorless, non-toxic smoke.

Compression Modulus

Compression modulus refers to the amount of pressure required to compress a piece of rubber to a certain percentage of original thickness. Compression Modulus (see below) shows the values for silicone sponge, solid and foam. Testing was performed on ½" thick cylindrical specimens.

Problem Solver

Our reputation for solving tough design problems is based on over 65 years of silicone rubber experience. And we are committed to developing and supplying the highest quality products and technical assistance that meet your exact needs. Bring us your most demanding silicone rubber requirements and we’ll deliver a Norseal Silicone Rubber product that exceeds your expectations.

Silicone Sponge Rubber

The full line of Norseal Silicone Sponge Rubber is designed for a variety of gasketing, cushioning, insulating and protecting applications, with a wide range of temperatures and environments. Our experts can help you chose the proper product for your requirements, including formulations designed for general gasketing, flame retardant cushions, specification grade, solvent resistant gaskets and weather seals.

Key benefits of our closed cell sponge include thermal stability over a wide temperature range, excellent compression set resistance, ozone and UV resistance. All closed-cell Norseal Silicone Sponge products are subjected to the most extreme post-cure cycle process in the industry in order to lower material out-gassing for cleaner operation in critical applications. Alternatively, non-post-cured competitive silicone rubber is known to have high out-gassing, which causes contamination issues in electronics and safety concerns in the aerospace industry.

Product Range

R10400 – Unparalleled flame retardant properties with enhanced solvent resistance; thicknesses down to and including 1/16" pass UL 94 with a V-0 rating. Available in medium grade.

R10404 – A thermally conductive silicone sponge rubber, this material offers electrical isolation and compression set resistance.

R10450 – Features a unique construction with fiberglass reinforcement providing dimensional stability. Available in medium grade.

R10460 – Flame retardant (UL 94 HB) and especially resistant to compression set. Available in medium grade.

R10470 – General-purpose silicone sponge, appropriate for most applications. Available in medium and firm grades.

R10480 – Features an extremely low compression set and maintains resiliency even under extended compression. Available in soft and medium grades.

R10490 – Excellent solvent resistance Fluorosilicone grade for use as a gasket where it is necessary to contain fluids that would degrade normal silicone sponge and solid materials. Temperature range of -80°F to +400°F.


  • Press relief pads
  • Electric meters
  • Military specification grade gasketing
  • Lighting gaskets
  • Drones
  • Digital signage
  • Space exploration

Silicone Solid Rubber

The Norseal Silicone Solid Rubber line includes specification grade, high-performance grade and electrically conductive grade products. Products range in thicknesses from .031" (.79mm) to 1/4" (6.35mm) in durometer, hardness from 30-70 on the Shore A scale. Temperature ratings generally range between -100°F to +500°F (-73°C to +260°C).

Often referred to as “red rubber” because historical offerings were red in color, Norseal Silicone Solid Rubber also comes in clear, grey, black and green with minimum quantity restrictions.

Product Range

Series 300-700 – Specification-grade general purpose sheet goods, available in thicknesses up to 1/4" and withstanding temperatures from -100°F to +500°F.

Series 9030-9070 – Specification-grade continuous general purpose yard goods produced in 36" wide continuous lengths for the most efficient utilization of material, minimizing waste.

Series 9200 – Providing great tensile strength and tear resistance, this series is tougher and more resilient than general-purpose silicone and can withstand temperatures from -100°F to +400°F.


  • Environmental gasketing
  • Aircraft wings and helicopter blades
  • Vibration damping and cushioning
  • MRI/CAT Scan cabinets
  • Flood lights and spotlights
  • Commercial appliances
  • Military equipment

Reinforced Solid Rubber

Norseal Silicone Reinforced Solid Rubber with fiberglass increases the product’s dimensional stability for high-pressure applications, while functioning over a wide temperature range. Most products feature different solid silicone rubber durometers (hardness) on both sides of the fiberglass reinforcement. We also offer a product with a closed cell silicone sponge on both sides of the fiberglass substrate. Materials are available in yard goods and sheets, with and without pressure-sensitive adhesive on one side. Thicknesses range from .031" (.79mm) up to .125" (3.17mm). Products are designed for various ranges of pressure and temperature resistance.

Product Range

3320 – General purpose press pad developed to meet AMS 3320; for temperatures up to 350°F (177°C) and pressure up to 500 psi. Resistant to lubricating oil along with excellent compression set resistance.

4032/4050 – Thin, flexible and abrasion resistant; typically chosen for flexible gasketing applications.

4100 – FAR 25.853 flame retardant material available in 3 thicknesses. Contact Customer Care for additional information.

4420 – Specially formulated for thermal stability and long life under extreme heat and pressure for extended dwell times; formulated for increased temperature resistance up to 400°F (204°C) and pressures up to 500 psi.

4444 – Uniquely designed to give better reversion resistance; features a special crush-resistant fiberglass, making it excellent for press pads in high-temperature and pressure lamination applications; for increased temperature resistance up to 400°F (204°C) and pressures up to 1000 psi.

4480 – Our most reversion resistant silicone compound, 4480 is designed for use in applications involving the tough combination of prolonged high-pressure confinement (up to 1000 psi) at temperatures up to 600°F (315°C).


  • Press pads for PCB laminations Engine compartments
  • High-strength gasketing
  • Flexible circuit boards
  • Printed circuit boards
  • Military aircraft
  • High pressure gaskets

Silicone Foam

Low-density, flame-retardant Norseal Silicone Foam yard goods provide outstanding performance for industries ranging from aviation and mass transit to automotive, electronics construction and furniture. Available as Norseal F-12 and F-20 Silicone Foam Rubber, these materials provide excellent flame retardance with low toxicity and smoke generation in a conformable expanded cellular material.

Non-corrosive for use with metals and in hostile environments, Norseal Silicone Foam has a low compression set. Applications include fireblocks, thermal barriers, noise and vibration dampeners, insulation and high-performance gaskets or seals. Its weather, moisture, ozone, UV and fungus resistance make it the perfect gasketing material for outdoor applications.

Available thicknesses range from 1/32" (0.8mm) to 1" (25.4mm). The standard color is grey for both F-12 and F-20, but other options including white and black are available, with minimum quantity requirements.

Product Range

F-12 – Has a modified cell structure and is produced in a low density for light gasketing and insulation applications. F-12 silicone foam combines unique flame retardancy and low toxic gas emission properties with excellent compression set resistance, conformity and low density. Combining two or all of these properties makes F-12 the ultimate fire blocking silicone foam for fire- and heat-resistant gaskets, seals and cushioning, as well as radiant heat shields and insulation blankets. Standard product features one smooth side and one slightly textured side; smooth both sides is available as a custom option. Available thicknesses range from 1/32" (0.8mm) to 1" (25.4mm).

F-20 – Features a finer cell structure (closed-cell) and is produced in a medium density design for mass transit and transportation applications. F-20 offers excellent compression set resistance and is often the product of choice in aircraft, aerospace, mass transit, military and electronic applications with extremely stringent smoke, flame and toxicity requirements. F-20 offers excellent resistance to environmental conditions, making it an excellent choice for both indoor and outdoor sealing and gasketing applications. Standard offering is smooth both sides for excellent sealing attributes. Available thicknesses range from 1/32" (0.8mm) to 0.5" (12.7mm).


  • Gasket seal for outdoor lighting
  • Seat cushioning
  • Medical equipment
  • Electronic vehicle (EV)
  • Access panel seals for railcar applications
  • Mass transit gasketing and insulation
  • Engine gaskets for aerospace

SNS Silicone Tapes

Norseal Silicone SNS Tapes provide all of the benefits of our silicone rubber in an easy-to-apply, pressure-sensitive adhesive tape form. Compressible and flexible, it can conform to irregular surfaces, wrap over cylinders or be formed to produce right angles. Applications include gasketing, vibration damping and thermal insulation. The tape reduces the need for expensive die-cut parts – you don’t pay for the center. Available with both high and low temperature silicone adhesive and aggressive, strong anchorage acrylic pressure-sensitive adhesive on one side. Norseal SNS Tapes can be supplied with closed cell sponge backing (SNS 100S, SNS 200A), fiberglass-reinforced closed cell sponge (SNS 300AR), soft and thin solid silicone (SNS 440S, SNS 440A) or flame retardant foam backing (SNS 512AF).

Product Range

100S – General-purpose closed cell sponge with silicone pressure-sensitive adhesive; available in thicknesses from 1/16" to 1/4" (1.59 mm to 6.35 mm).

200A – General-purpose closed cell sponge with acrylic pressure-sensitive adhesive; available in thicknesses from 1/16" to 1/4" (1.59 mm to 6.35 mm).

300AR – Reinforced silicone closed cell sponge with aggressive acrylic pressure-sensitive adhesive; available in thicknesses from 1/16" to 3/16" (1.59 mm to 3.18 mm).

440S – A 1/32" thick Shore A durometer silicone solid with a high-temperature silicone adhesive.

440A – Combines 30 durometer soft and conformable solid rubber with a high-adhesion acrylic adhesive for an excellent 1/32" (0.79 mm) thick gasket material. Shore A 30 durometer with aggressive acrylic pressure-sensitive adhesive.

512AF – Soft, conformable flame-retardant silicone foam backing with film-supported aggressive acrylic pressure-sensitive adhesive; available in thicknesses from 1/16" to 1/2" (1.59 mm to 12.7 mm).

520AF – Medium density closed cell flame-resistant foam with a film-supported acrylic pressure-sensitive adhesive; available in thicknesses from 1/16" to 1/2".

Temperature Range for PSA

Acrylic PSA: -20°F to + 325°F ( -29°C to +163°C)

Silicone PSA: -100°F to + 500°F (-73°C to + 260°C)


  • Outdoor light gasketing
  • Electronic packaging weather gasketing
  • Flame retardant insulation used in transportation
  • Light weight gasketing for aerospace
  • Thermal insulation
  • Military- Communication systems Walkie talkies

Thermally & Electrically Conductive Products

Our ThermaCool® family of high performance thermally conductive gap fillers provides solutions to difficult thermal management applications. These products can be used to fill gaps and enhance thermal performance of the electrical system.

Product Range

TF1818 – Silicone coated fabric offering high temperature capability and conformability in a heat sink gasket.

TF1867, 1869, 1877, 1979 and Furo 400 Series – Thermally conductive coated fabrics providing thin, cost-effective heat transfer capability. All products can be supplied with a thermally conductive acrylic adhesive on one side.

TC100 – Unsupported thermally conductive solid silicone rubber. This material offers thermal conductivity along with electrical isolation for heat transfer applications.

TC100U – Similar to TC100 but supplied in uncured configuration. Refrigerated storage is required.

EC102 – electronically conductive solid silicone. Featuring a unique chemical structure that gives it a high temperature stability and general inertness not available in any other elastomer.

TC2006, TC3006 and TC3008 are extremely compressible Gap Fillers to complement our ThermaCool family.


  • Outdoor light gasketing
  • Electronic packaging weather gasketing
  • Flame retardant insulation used in transportation
  • Light weight gasketing for aerospace
  • Thermal insulation
  • Military- Communication systems Walkie talkies

Providing Protection in Extreme Environments

Markets / Applications


  • Fire-retardant thermal insulation and seals
  • Wire harness protection
  • Acoustic attenuation
  • Vibration damping pads
  • Floor seals

Transportation (Rail & Auto)

  • Lighting enclosures
  • HVAC seals
  • Access panel seals
  • Electric vehicle battery pack seals


  • Press pad for flex
    and multi-layer circuitry
  • Thermally conductive gaskets
  • Static dissipative seals
  • LCD screens


  • Decal press pad machines
  • Membranes for laminated wood fabrication
  • Commercial lighting
  • High temperature gaskets
  • Environmental seals
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