Silicone Products Silicone Tubing

What Is Silicone Tubing?

Silicone tubing is a hollow, solid silicone rubber extrusion used for fluid transfer, sealing, insulation, protective sleeving, and other demanding industrial and commercial applications. Its dense, rubber construction provides flexibility, durability, and dimensional stability while maintaining reliable performance across a wide range of temperatures and environmental conditions.

Bellofram Elastomers manufactures custom silicone tubing in virtually any combination of inner diameter (ID) and outer diameter (OD) up to a maximum 2.5" OD. Available in durometers ranging from 30 to 80 Shore A, tubing dimensions, wall thickness, hardness, and formulation can be tailored to meet specific application requirements.

Key Takeaways

• Silicone tubing is a hollow, solid silicone rubber extrusion used for fluid transfer, sealing, insulation, and protective sleeving.
• Available in custom inner diameter (ID) and outer diameter (OD) combinations up to 2.5" OD.
• Available in durometers ranging from 30 to 80 Shore A.
• Designed for continuous operating temperatures from -85°F to +400°F.
• Solid silicone construction provides flexibility, durability, and dimensional stability.
• Silicone offers resistance to thermal cycling, UV, ozone, aging, and environmental stress.
• Flame-retardant versions are available to meet UL 94 V-0 and UL HB requirements.
• FDA-compliant and NSF 51 certified material options are available.
• Available in bulk rolls, cut lengths, or fabricated to meet unique product requirements.

Why Choose Solid Silicone Tubing?

Solid silicone tubing combines the flexibility of silicone rubber with the strength and dimensional stability of a dense, non-cellular construction. This makes it a versatile option for applications ranging from fluid transfer and insulation to sealing and protective sleeving.

Because both the inner and outer diameter can be customized, engineers can specify the required internal fit, wall thickness, overall diameter, and material hardness around the application rather than relying on a limited selection of standard tubing sizes.

Benefits of Solid Silicone Tubing

BENEFIT	WHY IT MATTERS
Custom ID and OD	Allows tubing dimensions and wall thickness to be tailored to specific fluid transfer, sealing, insulation, sleeving, and installation requirements.
Solid Silicone Construction	Provides flexibility, mechanical durability, and dimensional stability for demanding applications.
30–80 Shore A Durometers	Allows material hardness and flexibility to be matched to the mechanical requirements of the application.
Wide Temperature Range	Maintains reliable performance across continuous operating temperatures from -85°F to +400°F.
Environmental Resistance	Resists thermal cycling, UV, ozone, aging, and environmental stress for reliable performance in demanding environments.
Flexible Supply Options	Can be supplied in bulk rolls, cut lengths, or fabricated configurations to meet specific manufacturing and assembly requirements.
Specialty Formulations	Flame-retardant, FDA-compliant, NSF 51 certified, and other application-specific formulations are available.

Silicone Tubing Size and Material Options

Bellofram Elastomers manufactures solid silicone tubing in custom ID and OD combinations to support fluid handling, sealing, insulation, protective sleeving, and other application requirements.

Solid Silicone Tubing Options

OPTION	AVAILABLE CAPABILITY
Profile	Hollow, solid silicone rubber tubing.
Inner Diameter (ID)	Custom ID dimensions available to match internal fit and application requirements.
Outer Diameter (OD)	Available in custom OD dimensions up to a maximum of 2.5".
Wall Thickness	Determined by the selected combination of inner and outer diameter.
Durometer	Available in hardnesses ranging from 30 to 80 Shore A.
Temperature Range	-85°F to +400°F.
Custom Formulations	Materials can be tailored to functional, environmental, flammability, or regulatory requirements.

Standards and Specialty Silicone Tubing

Bellofram Elastomers offers solid silicone tubing formulations for applications requiring enhanced flammability performance or materials suitable for regulated environments.

Solid Silicone Tubing Standards and Specialty Options

OPTIONS	TYPICAL APPLICATION
UL 94 V-0	Flame-sensitive applications requiring enhanced vertical-burn performance.
UL HB	Applications requiring horizontal-burn flammability performance.
NSF 51	Food and beverage equipment requiring appropriate certified and FDA compliant materials.
Custom Formulations	Application-specific solid silicone compounds tailored to performance and environmental requirements.

Solid Silicone Tubing vs. Silicone Sponge Tubing

The primary difference between solid silicone tubing and silicone sponge tubing is material construction. Solid silicone tubing uses dense, non-cellular silicone rubber for greater mechanical durability and dimensional stability, while silicone sponge tubing has a closed-cell structure that provides lower density and greater compressibility.

Solid Silicone Tubing vs. Silicone Sponge Tubing

FEATURE	SOLID SILICONE TUBING	SILICONE SPONGE TUBING
Construction	Dense, non-cellular silicone rubber.	Closed-cell silicone sponge.
Density	Denser and heavier, solid elastomer construction.	Lighter-weight hollow profile construction.
Compression	Firmer and less compressible, providing greater structural support and mechanical stability.	Highly compressible and suited for lower closure-force sealing.
Gap Filling	Best suited where a firmer, more dimensionally stable tube is required.	Well suited for sealing applications requiring greater conformability and cushioning.
Typical Priority	Mechanical durability, dimensional stability, fluid transfer, protective sleeving, and firmer sealing.	Compression sealing, cushioning, insulation, environmental protection, and low closure force.

For applications requiring a lighter, more compressible hollow extrusion, explore our Silicone Sponge Tubing.

Common Applications for Solid Silicone Tubing

Solid silicone tubing is used across industrial and commercial applications where a flexible, durable hollow extrusion is needed for fluid transfer, insulation, sealing, protection, or sleeving.

Common Applications for Solid Silicone Tubing

APPLICATION	HOW SOLID SILICONE TUBING HELPS
Fluid Transfer	Provides a flexible hollow pathway for compatible liquids and other media in industrial and commercial equipment.
Protective Sleeving	Provides a flexible protective layer around wires, components, tubing, and other assemblies.
Electrical and Electronics	Provides insulation and protection around sensitive electrical and electronic components.
Industrial Equipment	Provides durable fluid handling, sealing, insulation, and component protection in demanding machinery and assemblies.
Food and Beverage Equipment	FDA-compliant and NSF 51 certified options can support applicable food processing and beverage handling applications.
Medical and Pharmaceutical Equipment	Specialty silicone formulations can support applicable fluid handling, insulation, and protective applications in regulated environments.
Outdoor Equipment	Resistance to UV, ozone, thermal cycling, and environmental stress supports reliable performance in outdoor applications.
Custom Assemblies	Custom ID, OD, wall thickness, and durometer allow tubing to be tailored around unique component and assembly requirements.

Custom Silicone ID and OD Tubing

One of the biggest advantages of Bellofram Elastomers' silicone tubing is the ability to customize both the inner and outer diameter.

Bellofram Elastomers can manufacture virtually any ID/OD combination up to a maximum of 2.5" OD. This allows engineers to specify internal fit, overall diameter, wall thickness, and material hardness around the application rather than selecting from a limited range of standard silicone tube sizes.

Custom silicone tubing can be designed around:

• Required inner diameter and internal fit.
• Outer diameter and available installation space.
• Wall thickness.
• Fluid transfer requirements.
• Required flexibility or rigidity.
• Durometer requirements.
• Temperature exposure.
• UV and ozone exposure.
• Flammability requirements.
• Food, beverage, pharmaceutical, or medical equipment requirements.

For more complex cross-sectional geometries beyond a hollow round tube, explore our Silicone Profiles.

For solid round extrusion without a hollow center, explore our Silicone Cords.

Solid Silicone Tubing for Fluid Transfer and Protective Sleeving

Unlike silicone sponge tubing, solid silicone tubing can support applications where the hollow center serves a functional purpose beyond compression sealing. Depending on the selected formulation and application requirements, the tube can provide a pathway for compatible fluids or function as flexible protective sleeving around another component.

Custom ID, OD, wall thickness, and durometer give engineers control over the tube's fit and mechanical characteristics. Bellofram Elastomers can then supply the tubing in bulk rolls, cut lengths, or fabricated configurations to support downstream manufacturing and assembly.

When Should You Choose Solid Silicone Tubing?

Solid silicone tubing may be the right solution when your application requires a hollow round profile combined with the durability and dimensional stability of dense silicone rubber.

Solid silicone tubing may be ideal when:

• A hollow round extrusion fits the application.
• Custom ID and OD dimensions are required.
• Fluid transfer or protective sleeving is required.
• Greater mechanical durability and dimensional stability are important.
• A durometer between 30 and 80 Shore A is required.
• Operating temperatures range from -85°F to +400°F.
• Resistance to UV, ozone, aging, or thermal cycling is important.
• UL 94 V-0 or UL HB flame performance is required.
• FDA-compliant or NSF 51 certified material is needed.
• An OD up to 2.5" is required.
• Bulk rolls, cut lengths, or fabricated tubing is preferred.

Why Choose Bellofram Elastomers for Silicone Tubing?

Bellofram Elastomers combines silicone material expertise and extrusion capabilities to manufacture custom solid silicone tubing around application-specific dimensions, hardnesses, and performance requirements.

Bellofram Elastomers offers:

• Virtually any inner diameter and outer diameter combination.
• Maximum outer diameter up to 2.5".
• 30 to 80 Shore A durometers.
• Dense, non-cellular solid silicone construction.
• Continuous temperature capability from -85°F to +400°F.
• Resistance to UV, ozone, aging, environmental stress, and thermal cycling.
• UL 94 V-0 and UL HB flame-retardant options.
• FDA-compliant and NSF 51 certified options.
• Bulk rolls, cut lengths, and fabricated tubing options.
• Custom formulations and dimensions.
• U.S.-based manufacturing and technical support.

Frequently Asked Questions About Silicone Tubing