supplying silicone rubber

Competitive Pricing, extensive inventory, short lead times

Solid Silicone Sheet

Available in commercial, food and military grades. Excellent for sealing and gasketing.

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silicone SPONGE sheet

Available in soft, medium and firm densities. Excellent Ozone and UV resistance for outdoor applications.

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customer experience

From communication to delivery, we’re focused on providing everything you need to help your business thrive.

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application support

If you need help with an application, specification or material selection, our team will work with you to figure it out.

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We ensure the effective supply of silicone throughout North America by partnering with expert service-oriented organizations.

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premium silicone rubber

solid & sponge rolls/sheets

Who we help

National Silicone provides solid silicone sheet, silicone sponge sheet, molded silicone, extruded silicone, and silicone base to our customer partners in North America and Europe. By joining our growing network of users, you gain access to high performance materials that are cost-effective. Produced at a former DOW Corning facility, we understand quality and consistency are the key to reliability which leads to material success in many applications.

strengths & Benefits of Silicone Rubber

  • Thermally stable over a wide range of temperatures (-60°C to 230°C)
  • Heat aging characteristics: Excellent
  • Ozone and UV resistance: Excellent
  • Weathering characteristics: Excellent
  • Oxidation resistance: Excellent
  • Resistance to alkali substances: Excellent
  • Electrical insulating properties: Excellent
  • Thermal insulating properties: Excellent
  • Food Safe: Yes
  • Oil Resistance: Good

key solid silicone specifications

  • Hardness: 40 to 80 Shore A
  • FDA: Meets FDA ingredient requirements
  • MIL: Meets A-A-59588 CL2A/2B (ZZ-R-765) requirements
  • Fiberglass Insert: Meets AMS 3320 requirements (1-2 ply fiberglass)

key silicone sponge specifications

  • Sponge Density: Soft, Medium (AMS3195), Firm (AMS3196)
  • UL: Meets UL94V-0 requirements
  • UL: Meets UL94 HB requirements (grey/blue sponge)

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Solid Silicone Sheet

Commercial Grade, FDA, Military Specifications

Formulated from a high silicone polymer mixture and manufactured in continuous rolls, we offer 3 grades of silicone sheet; Commercial, FDA and Military (ZZ-R). All possess excellent performance characteristics and are an outstanding choice for many gasket or sealing applications.


  • Thicknesses (in) –  1/16 to 1/2
  • Typical roll length (ft) –  50 to 100
  • Typical roll width (in) –  36 to 72
  • Surface finishing – Smooth finish, both sides
  • Colors – Red/orange, black, others available
  • Standard grades – Commercial, FDA food, mil-spec
  • Specialty grades – AMS3301, AMS3302, AMS3303, AMS3304, ZZ-R-765/A-A-5988 Class 2A/2B, EN45545-2, JISZ 2801:2000

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Silicone SPONGE Sheet

SOFT, Medium and Firm Density

Offering soft, medium (AMS3195) and firm (AMS3196) density closed cell silicone sponge. These materials have excellent compression set properties and are manufactured in continuous rolls, with a fabric impression surface finish on both sides. Delivering exceptional performance, National Silicone sponge materials are highly versatile and best suited for gasket, insulation or vibration damping applications.


  • Thicknesses (in) – 1/16 to 1/2
  • Typical roll length (ft) – 25 to 100
  • Typical roll width (in) – 36
  • Surface finishing – Smooth & fabric impression for all densities
  • Cell structure – Closed cell
  • Colors – Red/orange, grey, black, others available
  • Standard grades – Soft density, medium density (AMS3195) and firm density (AMS3196)
  • Specialty grades – ASTM D1056 2D1, ASTM D1056 2D2, FDA, FAR25.853 Horizontal/Vertical, EN45545-2, MIL-R-6130C/ASTM D6575 Type 2, Grade B, ISO 6916-2 Type 2, Class D

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Molded Silicone Parts

solid & sponge Silicone

Standard or custom, National Silicone can deliver molded parts in both solid and sponge silicone. Processes include compression molding, injection molding, and transfer molding. These processes allow for a number of products to be created across hardness’s and properties, including gaskets, seals, bumpers, pads, plugs and more.

Want to find out more, contact us today.

Sample end uses include:

  • Bellows
  • Bumpers
  • Diaphragms
  • Gaskets
  • O-rings
  • Pads
  • Plugs
  • Seals
  • Silicone parts bonded to rubber, metal or plastic
  • Specialty packaging & custom labeling
  • Silicone parts with PSA or adhesive

Silicone extrusions

cords, profiles, Sections & tubing

National Silicone’s extruded product line includes both solid and closed cell sponge silicone. Available across durometers and densities in many shapes, cords, tubes, and profiles. Manufactured in continuous lengths, these parts are ideal for many uses including insulators, thermal shields, seals, and vibration damping.

Want to find out more, contact us today.

Sample extrusions include:

  • Cording
  • Profiles
  • Rectangular Sections
  • Square Sections
  • Tubing
  • Tubing (FDA)

Silicone BASE


National Silicone offers base silicone for many standard high temperature vulcanizing (HTV), high consistency rubber (HCR) and liquid silicone rubber (LSR) grades. Perfect for use in your own mixing and compounding operations.

Want to find out more, contact us today.

Grades available include:

  • Anti Static for Molding
  • Electrical Insulating for Molding
  • Food Contact Grade for Molding
  • High Rebound Grade for Molding
  • High Strength Grade for Molding
  • Ultra Low Hardness for Molding
  • General Purpose for Molding & Extrusion
  • Modified Rubber for Molding & Extrusion
  • Flame Retardant for Molding, Extrusion & Fumed Grades
  • Fumed High Strength & High Transparency for Molding & Extrusion
  • High Temperature Resistant Silicone for Standard, General & Fumed Grades
  • Self Lubricating Rubber for Fumed, Fumed High Strength & Precipitated Grades

silicone applications

common uses for silicone products

If you need a rubber product that can hold up in tough working conditions, silicone rubber is an ideal option. It is rapidly becoming the material of choice for end users wanting a high quality rubber that comes with a long service life. From sealing and insulating to vibration damping and gasketing, the resilience and flexibility of silicone lends itself well to both interior or exterior uses.

It is an excellent choice for applications where extreme temperature fluctuations occur or where environmental factors such as exposure to UV, ozone and general weathering exist. Below is a brief outline of some common applications for silicone products:

Used to prevent leakage into (or from) the joined objects while under compression.

Noise Reduction:
Used for acoustic dampening and to reduce high volume sound.

Vibration Dampening:
Used to reduce the amount of energy that’s produced by a given product.

Due to the rubber’s flexible nature silicone can be used for precise sealing needs.

Silicone rubber is designed to stop the process of heat and electricity from spreading.

Thermal Insulation:
Stops unwanted heat from entering through to the other side of an application.

Thermal Shielding:
Can act as a shield by absorbing excessive heat.

Protects light enclosures from a range of elements (water, dust and moisture, high temperatures).

What we do

fast, KNOWLEDGEABLE, dependable

How We Provide Quality Silicone Products

We deliver quality silicone materials to help businesses and their customers thrive. This means providing silicone rubber strong enough to hold up through the toughest working conditions. Whether you’re looking for cushioning, insulation, sealing, noise reduction or any other of the many benefits silicone can provide, we have the service, application knowledge and inventory to get you exactly what you need.

Our dedication to great products and services comes from our appreciation of our customers. We aim to build long-term relationships where we can work closely with customer partners to help select materials, solve application issues or product design challenges.

With end users ranging from the largest OEM’s in the world to small independents, our focus of delivering on quality, price and responsiveness has been critical to the success of our silicone in the industrial marketplace.

The best business decisions are well-informed ones, which is why National Silicone materials are sold through a network of preferred converters and distributors. This exclusive group is armed with the tools and resources to ensure our shared end users receive the best possible experience.

To order what you need, locate one of our distribution partners and let them know the silicone materials you need. You can also order directly online through our connect with us form (below) or by reaching us at 1-888-814-6599.