Introduction

Rubber cords play a crucial role in sealing applications across multiple industries. These flexible, durable, and efficient components are commonly used in static and dynamic sealing environments. Available in various materials such as silicone, EPDM, Nitrile (NBR), and Viton, rubber cords offer high resistance to extreme temperatures, chemicals, and environmental conditions. In this article, we will explore the benefits, applications, and different types of rubber cords used in sealing solutions.

What are Rubber Cords?

Rubber cords are cylindrical elastomeric components designed for sealing applications. They are often used when O-rings or other sealing methods are not suitable for a given application. These cords can be cut to custom lengths and joined into O-rings or used as standalone seals.

Key Benefits of Rubber Cords

1. High Flexibility & Durability – Rubber cords can withstand stretching and compression without losing their shape or integrity.

2. Weather & Chemical Resistance – Depending on the material used, rubber cords can resist UV exposure, ozone, oils, and various chemicals.

3. Temperature Resistance – Some rubber cords, such as silicone and Viton, perform well in extreme temperatures ranging from -50°C to 300°C.

4. Customizable Lengths – Available in various diameters and materials, rubber cords can be cut to the exact length needed.

5. Cost-Effective – Compared to other sealing methods, rubber cords provide a cost-effective and efficient sealing solution.

Types of Rubber Cords

1. Silicone Rubber Cords

   • Excellent thermal stability

   • FDA-compliant for food and medical applications

   • Resistant to weathering and aging

2. EPDM Rubber Cords

   • High resistance to weather, ozone, and UV

   • Used in outdoor sealing applications

   • Suitable for steam and water-based environments

3. Nitrile (NBR) Rubber Cords

   • High resistance to oils and fuels

   • Commonly used in automotive and industrial applications

   • Good abrasion resistance

4. Viton Rubber Cords

   • Excellent chemical resistance

   • Withstands extreme temperatures and harsh conditions

   • Used in aerospace, chemical, and fuel-handling industries

Applications of Rubber Cords

• Automotive Industry – Used in engine compartments, fuel systems, and door seals.

• Medical & Pharmaceutical – FDA-approved silicone rubber cords are used in medical devices and equipment.

• Aerospace Industry – High-performance rubber cords such as Viton provide excellent sealing in extreme environments.

• Food Processing – Food-grade rubber cords help maintain hygiene and prevent contamination.

• Construction & Industrial Applications – Used in sealing doors, windows, and heavy machinery components.

Choosing the Right Rubber Cord for Your Application

When selecting a rubber cord, consider:

• Material Properties – Ensure the material is suitable for the environmental and chemical exposure.

• Diameter & Hardness – Select the right thickness and Shore A hardness for a proper seal.

• Temperature & Pressure Conditions – Choose a rubber cord that can withstand the operating conditions.