Silicone Products Silicone Profiles

What Are Solid Silicone Profiles?

Solid silicone profiles are custom extruded silicone rubber shapes used for sealing, gasketing, insulation, vibration control, and environmental protection. Unlike silicone sponge profiles, solid silicone profiles have a dense, rubber construction that provides greater firmness, mechanical durability, and dimensional stability.

Bellofram Elastomers manufactures solid silicone extrusion profiles in standard and custom geometries, including rectangles, cords, tubing, U-profiles, P-profiles, double-P profiles, D-profiles, T-profiles, E-profiles, and other application-specific shapes. With in-house die-making capabilities, custom silicone profiles can be engineered around unique sealing, mounting, and assembly requirements.

Key Takeaways

• Solid silicone profiles are dense, rubber extrusions used for sealing, gasketing, insulation, and environmental protection.
• Standard shapes include rectangles, cords, tubing, U-, P-, double-P-, D-, T-, and E-profiles.
• Bellofram Elastomers has in-house die-making capabilities for custom silicone extrusion profiles.
• Available in durometers ranging from 30 to 80 Shore A.
• Designed for temperatures from -85°F to +400°F.
• Flame-retardant formulations are available to meet UL 94 V-0 and UL HB requirements.
• FDA-compliant and NSF 51 certified silicone profile options are available.
• Profiles can be manufactured in custom colors and sizes.
• Common applications include aerospace, automotive, HVAC, medical, electronics, industrial equipment, and environmental sealing.

Why Choose Solid Silicone Profiles?

Solid silicone profiles combine silicone rubber’s temperature stability and environmental resistance with a dense, durable extrusion construction.

Because profile geometry can be tailored to the assembly, engineers can design specific sealing surfaces, retention features, channels, contact points, and mounting configurations rather than adapting a generic sealing component to the application.

Benefits of Solid Silicone Profiles

BENEFIT	WHY IT MATTERS
Custom Profile Geometry	Allows the extrusion shape to match specific sealing surfaces, channels, mounting features, and assembly requirements.
Dense Solid Construction	Provides greater firmness, mechanical durability, and dimensional stability than cellular silicone sponge profiles.
Wide Durometer Range	Hardnesses from 30 to 80 Shore A allow flexibility and firmness to be matched to application requirements.
Wide Temperature Range	Maintains performance from -85°F to +400°F across demanding hot and cold environments.
Environmental Resistance	Silicone supports long-term performance in applications exposed to heat, cold, UV, ozone, and changing environmental conditions.
Industry-Specific Formulations	Flame-retardant, FDA-compliant, and NSF 51 certified options are available for specialized applications.
Custom Colors and Sizes	Profiles can be tailored to functional, identification, branding, or aesthetic requirements.

Available Solid Silicone Profile Shapes

Bellofram Elastomers manufactures both standard and fully custom solid silicone extrusion profiles. In-house die making allows the profile cross-section to be designed around the application rather than limiting customers to off-the-shelf shapes.

Common Solid Silicone Profile Shapes

PROFILE TYPE	TYPICAL USE
Rectangles	Flat compression sealing, cushioning, and gap filling.
Tubing	Hollow round sealing, fluid handling, and flexible insulation applications.
Cords	Simple round sealing, gasketing, and gap filling.
U-Profiles	Edge protection, channel sealing, and panel applications.
P-Profiles	Sealing where a bulb and attachment section are required.
Double-P Profiles	Applications requiring multiple sealing contact points.
D-Profiles	Door, enclosure, and panel sealing.
T-Profiles	Retention, edge sealing, and custom mounting configurations.
E-Profiles	Multi-contact sealing and complex gasketing applications.
Custom Profiles	Designed around customer-specific geometry, compression, and installation requirements.

Solid Silicone Profile Material and Performance Options

Bellofram Elastomers offers solid silicone extrusion profiles in multiple hardnesses, sizes, colors, and specialty formulations.

Solid Silicone Profile Options

OPTION	AVAILABLE CAPABILITY
Durometer	30 to 80 Shore A.
Temperature Range	-85°F to +400°F.
Profile Geometry	Standard shapes and fully custom cross-sectional designs.
Colors	Custom color options are available.
Flame-Retardant Options	Formulations available to meet UL 94 V-0, UL HB, and other application-specific flammability requirements.
Food and Water Contact Options	FDA-compliant and NSF 51 certified silicone profiles are available for applicable regulated environments.
Custom Die Making	In-house die-making capabilities support both standard and highly customized extrusion designs.

Standards and Specialty Solid Silicone Profiles

Bellofram Elastomers can formulate solid silicone extrusion profiles for applications with specialized flammability, food-contact, water-contact, and environmental requirements.

Solid Silicone Profile 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 silicone compounds tailored to mechanical, environmental, and regulatory requirements.

Solid Silicone Profiles vs. Silicone Sponge Profiles

The primary difference between solid silicone profiles and silicone sponge profiles is material construction. Solid profiles provide denser, firmer rubber construction, while silicone sponge profiles contain a closed-cell structure that makes them lighter and more compressible.

Solid Silicone Profiles vs. Silicone Sponge Profiles

FEATURE	SOLID SILICONE PROFILES	SILICONE SPONGE PROFILES
Construction	Dense, non-cellular silicone rubber.	Closed-cell silicone sponge.
Density	Denser and heavier, solid elastomer construction.	Lighter-weight profile construction.
Compression	Firmer and less compressible, providing greater sealing force and mechanical stability.	Highly compressible and suited for lower closure-force sealing.
Gap Filling	Best suited where a firm, dimensionally stable profile is required.	Well suited for uneven gaps and surfaces requiring greater conformability.
Typical Priority	Mechanical durability, dense sealing, firmness, and dimensional stability.	Compression sealing, cushioning, environmental protection, and low closure force.

For applications requiring a lighter, more compressible custom profile, explore our Silicone Sponge Profiles.

Common Applications for Solid Silicone Profiles

Solid silicone extrusion profiles are used where a specific cross-sectional shape must provide reliable sealing, gasketing, insulation, vibration control, or environmental protection.

Common Applications for Solid Silicone Profiles

APPLICATION	HOW SOLID SILICONE PROFILES HELP
Industrial Equipment	Provides durable sealing, insulation, and vibration control in machinery exposed to demanding operating conditions.
Electrical Enclosures	Custom profile geometry helps seal doors, access panels, and equipment housings.
HVAC Systems	Supports sealing around panels, doors, air-handling equipment, and thermal barriers.
Aerospace	Provides temperature-resistant sealing and insulation for demanding operating environments.
Automotive	Supports underhood sealing, environmental protection, and other applications exposed to heat and vibration.
Medical Equipment	Application-specific silicone formulations can support sealing and insulation requirements in regulated equipment.
Food Equipment	FDA-compliant and NSF 51 certified material options are available for applicable equipment requirements.
Electronics	Provides sealing, insulation, and protection around sensitive electrical and electronic assemblies.

Custom Silicone Extrusion Profiles

When an off-the-shelf extrusion cannot meet the application’s geometry, Bellofram Elastomers can develop a custom solid silicone profile around the required cross-section.

Our in-house die-making and silicone extrusion capabilities support custom profile features for:

• Compression sealing
• Retention and mounting
• Edge protection
• Multiple sealing contact points
• Custom channels and grooves
• Irregular mating surfaces
• Thermal insulation
• Vibration control
• Application-specific dimensional requirements

Custom colors and material formulations can also be incorporated to support identification, branding, regulatory, or functional requirements.

For applications requiring especially large cross-sectional geometries, Bellofram Elastomers also manufactures large profile extrusions and supports custom silicone extrusions up to 3.5” OD.

When Should You Choose a Solid Silicone Profile?

A solid silicone profile may be the right choice when the application requires a custom extrusion geometry combined with the firmness, durability, and dimensional stability of dense silicone rubber.

Solid silicone profiles may be ideal when:

• A custom cross-sectional shape is required.
• Greater firmness and mechanical durability are needed.
• A durometer between 30 and 80 Shore A is required.
• Operating temperatures range from -85°F to +400°F.
• The profile must maintain dimensional stability under compression.
• UL 94 V-0 or UL HB flame performance is required.
• FDA-compliant or NSF 51 certified silicone is needed.
• A custom color, size, or profile geometry is required.
• A solid, non-cellular seal is preferred over silicone sponge.

Why Choose Bellofram Elastomers for Silicone Profiles?

Bellofram Elastomers combines in-house silicone extrusion and die-making capabilities to support both standard and highly customized solid silicone profiles. Our process provides control over material formulation, profile geometry, hardness, size, and finished part consistency.

Bellofram Elastomers offers:

• Standard and fully custom profile geometries.
• In-house extrusion die making.
• Durometers from 30 to 80 Shore A.
• Temperature capability from -85°F to +400°F.
• UL 94 V-0 and UL HB flame-retardant options.
• FDA-compliant and NSF 51 certified options.
• Custom colors and sizes.
• Prototype through production-volume manufacturing support.
• Large profile extrusion capabilities up to 3.5” OD.
• U.S.-based manufacturing and technical support.

Frequently Asked Questions About Silicone Profiles