Rubber extrusion is the process of producing shaped rubber profiles used for sealing, edging, vibration control, and protection. These profiles are essential across industries like automotive, construction, marine, and general manufacturing, where durability and flexibility are key.
At Delta Rubber Limited, we supply a wide range of rubber extrusion profiles, including U channels, door seals, P sections, and more—available in various materials and sizes to suit different applications.
In this blog, we’ll explore what rubber extrusion is, the materials used, the different profile types we offer, and how to choose the right option for your project.
What is Rubber Extrusion?
Rubber extrusion is a manufacturing process that forms rubber into continuous, uniform profiles by forcing uncured rubber through a shaped die. This method allows for the efficient production of long lengths of rubber sections with consistent cross-sections.
Extruded rubber is commonly used for sealing, edge protection, insulation, and impact resistance. The process is ideal for producing profiles like U channels, P sections, door and window seals, and more. These profiles are supplied in coils, cut lengths, or custom-finished parts depending on the application.
Because the extrusion process supports a wide variety of shapes and materials, it’s a cost-effective solution for both standard and custom rubber components used in demanding environments.
Rubber Extrusion Materials
The performance of any rubber extrusion depends heavily on the material used. At Delta Rubber, we primarily supply extrusions made from EPDM, with options also available in Neoprene and Silicone, depending on the application.
EPDM is the most commonly used material for rubber extrusions. It offers excellent resistance to weathering, UV, ozone, and moisture, making it ideal for outdoor and automotive use. It also maintains flexibility over a wide temperature range.
Neoprene provides good resistance to oils, greases, and moderate chemicals, along with solid weather resistance. It’s a suitable choice for industrial environments and some marine applications.
Silicone is used where high temperature resistance or food-grade compliance is required. It performs well in extreme temperatures and remains flexible, making it ideal for specialised sealing and insulation applications.
Each material brings specific strengths, so choosing the right one depends on the environmental conditions and performance needs of your application.
Types of Rubber Extrusion Profiles
Rubber extrusion profiles are manufactured in a variety of shapes to suit different functional needs across industries. Each profile is designed with a specific purpose—whether it’s for sealing against air and moisture, protecting edges, absorbing vibration, or providing insulation. Below is an overview of the main extrusion types we supply and their typical applications.
U Channel Rubber Extrusion
U channel extrusions have a U-shaped cross-section that fits over the edge of panels, doors, or glass. They provide protection against impact and help create a clean, finished look. Commonly used in automotive, marine, and construction industries, they are ideal for panel edging, door frames, and window protection.
Angle Section Rubber Extrusion
Angle sections are L-shaped profiles designed to reinforce and protect exposed corners. They’re typically used in construction and manufacturing settings for corner protection, framework support, or as edging around structures that are subject to knocks and wear.
Self-Grip Flexible Seal Rubber Extrusion
Self-grip profiles feature internal lips or metal-reinforced cores that allow them to grip tightly to the edge of panels without adhesives. These extrusions are quick to install and remove, making them ideal for machinery guards, vehicle doors, and custom enclosures in the automotive and equipment manufacturing sectors.
P Section Rubber Seal
P sections have a rounded bulb on top of a flat stem, resembling the letter “P”. This design allows them to compress and form an airtight seal, commonly used in vehicle doors, hatch seals, and equipment enclosures. They’re often used in automotive, marine, and industrial settings.
Solid Rubber Piping Section
Solid piping sections are circular or semi-circular rubber profiles typically used for trim and decorative edging. Found in automotive interiors, upholstered furniture, and marine applications, they provide both protection and a visually clean finish along edges and seams.
T Section Rubber Extrusion
T sections have a T-shaped cross-section that fits into a slot or channel, providing a secure join or divider between two panels. These are often used in glazing, partitioning, and panel joining tasks across automotive, marine, and building applications.
Window Seal Rubber
Window seals are designed to hold glass panels securely in place while providing a weatherproof seal. These are commonly used in automotive glass, marine windows, and building facades, helping prevent water ingress and reduce vibration and wind noise.
Tank Strap Rubber Extrusion
Tank strap extrusions are typically flat or curved sections designed to sit between a metal strap and a fuel tank or cylinder. They protect against vibration and wear caused by metal-on-metal contact. These are used in automotive fuel systems, trailers, and heavy-duty industrial machinery.
Each profile serves a specific function, and choosing the right one depends on your application’s mechanical, environmental, and dimensional needs.
Types of Rubber Extrusion Profiles
Selecting the correct rubber extrusion profile depends on the specific requirements of your application. Factors such as fit, sealing function, environment, and material compatibility should be considered to ensure long-term performance and durability.
Start by identifying the purpose of the profile—whether it’s for sealing, edge protection, vibration reduction, or insulation. Then consider the shape that best suits the contact surface and movement involved. For example, P sections are ideal for compressible seals, while U channels are better suited for edge protection.
Material choice is equally important. Use EPDM for outdoor and weather-exposed applications, Neoprene for general-purpose use with moderate oil resistance, and Silicone where flexibility and high-temperature performance are needed.
Finally, take accurate dimensions and ensure the selected profile will fit securely and perform under the conditions it will be exposed to—whether that’s pressure, temperature, movement, or exposure to fuel, UV, or chemicals. If in doubt, speak to a specialist or request a sample before ordering in bulk.
Where to Buy Rubber Extrusions Online
At Delta Rubber, we make it easy to source the right rubber extrusion for your project. You can browse our full rubber extrusion profile catalogue (PDF), which includes every standard profile available for manufacturing. If you have a specific profile requirement, simply contact us with the reference or a sample, and we’ll provide a tailored quotation.
We also stock and supply hundreds of rubber extrusions available to buy online. Choose from a wide range of profiles, select your required length, and benefit from low prices and fast nationwide delivery. CLICK HERE to browse our buy online range of rubber extrusion.
Custom Rubber Extrusion Profile Manufacturing
If you can’t find a standard profile to match your requirements, Delta Rubber offers a custom rubber extrusion manufacturing service. We can produce bespoke extrusion profiles based on your technical drawing, CAD file, or physical sample, ensuring an exact fit for your application.
Custom profiles can be manufactured in a wide range of materials including EPDM, Neoprene, Silicone, and more, with options for different hardnesses (Shore A), colours, and finishes. Whether you need a one-off prototype or high-volume production, we can deliver consistent quality and precision. Contact our team to discuss your requirements and receive a tailored quotation.