When you need a material that can handle extreme heat, harsh chemicals, and tight tolerances all at once, the list of options gets short fast. Calendered silicone sheets have become a go-to solution across some of the most demanding industries in the world, and for good reason. From aerospace to automotive, these sheets deliver consistent performance where it matters most.
What Is Calendered Silicone and How Is It Made?
The name might sound technical, but the core idea is straightforward. Calendering is a manufacturing process where raw silicone material is fed through a series of precision rollers under high pressure. Those rollers compress and shape the silicone into flat, continuous sheets or rolls with a controlled thickness and a smooth, uniform surface.
The process starts with a silicone compound formulated to meet specific performance requirements. From there, it moves through the calendering machine, which sets the thickness and surface finish. Once complete, the sheet can be cured or left uncured, depending on the application.
The result is a product with tight dimensional tolerances and consistent properties throughout. This matters when parts need to fit precisely or perform reliably in the field.
What Makes Calendered Silicone Worth Using?
Calendered silicone sheets and rolls offer a combination of properties that not many other materials can match. Silicone maintains its physical properties across a wide range of temperatures, from well below freezing to extreme heat, making it suitable for environments where other materials would crack, harden, or degrade. It also holds up well against oils, solvents, and many industrial chemicals, and resists UV radiation and outdoor weathering.
Silicone bends and stretches without losing its structural integrity. This flexibility allows it to conform to irregular surfaces and maintain an effective seal even under movement or vibration.
One of the real advantages of silicone compounding is the ability to engineer the material for specific needs. Formulations can be adjusted for high strength, low compression set, electrical conductivity, food contact compliance, and more. The material can be tailored to fit the application, not just selected off a shelf.
The calendering process also produces sheets and rolls with precise, repeatable dimensions. That consistency matters in applications where a gasket or seal must perform the same way every time.
Where Is Calendered Silicone Used?
Calendered silicone is found across a wide range of industries, and its versatility is a big part of why it is so widely used.
Gaskets and Seals
One of the most common uses is in gaskets and seals. Sheets are die-cut or water-jet cut into the exact shape needed. Because silicone compresses and recovers well, it creates reliable seals in applications with vibration or thermal cycling.
Electrical Insulation
Silicone has strong dielectric properties, meaning it resists the flow of electricity effectively. Calendered silicone sheets and rolls are used to insulate wires, cables, and electronic components. Certain formulations can also be engineered for EMI/RFI shielding applications.
Several industries rely on calendered silicone sheets and rolls as part of their everyday operations. These include:
- Aerospace, where materials must perform in extreme temperatures and low-pressure environments.
- Automotive, where engine heat, vibration, and chemical exposure are constant concerns.
- Medical, where biocompatibility and the ability to withstand sterilization are required.
- Military and defense, where materials must meet strict specifications and hold up in demanding conditions.
- Energy and utilities, where protective and insulating components are critical to safe operation.
- Construction, where seals and protective materials face ongoing environmental exposure.
What Specifications and Finishes Are Available?
Many industries require materials that meet documented standards. Calendered silicone can be formulated to meet a wide range of specifications, including FDA 21 CFR 177.2600 for food contact, MIL-Specs for defense applications, ASTM D2000, AMS specifications for aerospace, and UL, NSF, and RoHS compliance.
Durometer can be specified across a range from 10 Shore A up to 90 Shore A. Sheet thickness can be produced from as thin as 0.005 inches up to 0.250 inches, with widths up to 42 inches. Sheets are available in continuous rolls or cut to size.
Getting a sheet into a usable form often requires additional steps. Fabrication services can convert a continuous roll into finished components ready for assembly. Common finishing operations include die-cutting and water-jet cutting for precision shapes or PSA application to add an adhesive backing for easier installation.
Having these capabilities in-house helps streamline the process from raw material to finished part, reducing lead times and keeping quality consistent throughout.
Work With Reiss Manufacturing
Reiss Manufacturing has spent over 80 years helping industries find silicone solutions that actually hold up on the job. Our calendered silicone is produced using in-house compounding, calendering, and fabrication capabilities, so we control quality at every stage of the process.
Whether you need a standard formulation or something engineered to a specific industry specification, our team is ready to help. We work with customers in aerospace, automotive, medical, military, construction, and energy sectors to develop calendered silicone products that perform in the real world.
Ready to get started? Request a quote or explore our calendering capabilities to learn more about what we can produce for you!
Calendered Silicone FAQs
Calendered silicone sheets are flat, continuous sheets of silicone rubber produced by feeding silicone compound through a series of precision rollers. The process creates sheets with uniform thickness and a smooth surface finish.
Sheets and rolls can be produced in thicknesses from 0.005 inches to 0.250 inches and in widths up to 42 inches. They are available in continuous rolled lengths or cut to size.
Yes. Formulations can be developed to meet FDA 21 CFR 177.2600 for food contact and other specifications.
Calendered silicone sheets and rolls are available from 10 Shore A on the softer end to 90 Shore A on the firmer end, depending on what the application requires.
Yes. Sheets and rolls can be supplied in either a cured or uncured state, depending on the customer's downstream process and application needs.
