High Performance Silicone Sheet Rubber | National Silicone

National Silicone

Competitive Pricing, extensive inventory, short lead times

Silicone foam

New automotive purposed silicone foam was approved and listed for GMW16392 Class 2 Type 2.


Solid Silicone Sheet

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


silicone sheet rubber

solid & sponge sheet

National Silicone specializes in supplying solid silicone sheet and closed cell silicone sponge/foam sheet. Our products are designed for premium performance and are an ideal choice for gaskets, seals and vibration management applications in industries ranging from automotive to food & beverage to military & defense. Produced at a former Dow Corning facility, we understand quality and consistency are the key to reliability which leads to material success in critical applications.

Silicone Sheet Rubber Sample Board | National Silicone

99.97% Quality Rating

We believe in supplying quality silicone. In 2019 we delivered 99.97% quality to our customers.

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Technical support

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

View Silicone Uses

5 million in inventory

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

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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)

99.97% quality delivered in 2019

Our customers rely on an uninterrupted supply of quality consistent silicone materials in order to keep their customer base happy, and machines running smoothly. As a result, in 2019 we delivered 99.97% quality to our customers. Hence, only 0.03 percent of the material that was delivered was claimed for credit against the purchases our customers made.

Speak with a product specialist about your needs

Call 1-888-814-6599

Solid Silicone Sheet

Commercial, FDA, Military Grades

Our series of solid silicone sheet are constructed using a high silicone polymer mixture which translates to exceptional performance across all durometers. Designed with a long service life in mind, these materials provide excellent resistance to chemicals, fluids, and extreme temperature environments. Manufactured in continuous rolls, in three grades, with a smooth surface finish on both sides. These products are currently available for sale in North America, Europe & Asia.

  • Commercial Grade Solid Silicone (40-80 duro)
  • FDA Grade Solid Silicone (40-80 duro)
  • Military Grade Solid Silicone (40-80 duro)

Go to Commercial Grade Solid Silicone Product Page
Go to FDA Grade Solid Silicone Product Page

Silicone SPONGE Sheet

SOFT, Medium and Firm Density

Our series of closed cell silicone sponges are excellent for conditions that require a soft compressible material with high-performance properties. Designed to provide extra strength and durability, these materials are versatile and are idea choice in extreme temperature environments for gaskets and sealing applications. Manufactured in continuous rolls, in three firmness grades, with a fabric impression surface finish on both sides. These products are currently available for sale in North America, Europe and Asia.

  • Soft Density Closed Cell Sponge
  • Medium Density Closed Cell Sponge (AMS3195)
  • Medium Density Fire Retardant Closed Cell Sponge
  • Firm Density Closed Cell Sponge (AMS3196)

Go to Silicone Sponge Soft Product Page
Go to Silicone Sponge Medium Product Page
Go to Silicone Sponge Medium Flame Retardant Product Page
Go to Silicone Sponge Firm Product Page

Automotive Silicone Foam

Medium Density

Our medium density closed cell silicone foam is formulated to meet GM Worldwide specification GMW16392 Class 2, Type 2. This specification covers silicone foam materials used for sealing various components within vehicles. Our silicone foam material is recommended for applications where the operating temperature range is -55 °C to +200 °C. It is manufactured in continuous rolls, with a fabric impression surface finish on both sides. This product is currently available for sale in North America, Europe and Asia.

Go to Silicone Foam Product Page

Silicone BASE


We offer silicone base 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. These products are currently available for sale in North America, Europe & Asia.

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

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products in development

coming soon

We are continually working to expand the number of high performance silicone products we can offer to our customer and the marketplace. Below is a high level overview of the materials we are currently working on commercializing. If you have a question about one of these items please contact us and we will be happy to give you more details.

  1. LSR sponge sheet: UL-94 V-0
  2. Fiberglass solid sheet: AMS3320
  3. Fiberglass sponge sheet: AMS3195
  4. High strength solid sheet: ZZR-765 / A-A-59588B Class 3B
  5. Fluorosilicone solid sheet: MIL-R-25988B Type 2 Class 1
  6. Conductive solid sheet: N/A
  7. Reversion resistant: N/A
  8. Medical grade: USP Class VI & FDA 21 CFR 177.2600

What We Do

fast, supportive, knowledgeable

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.

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.

Silicone Sheet Rubber | National Silicone