Waterproof M8 Metal Washers EPDM Seal, Neoprene Bonded Rubber Washers for Bolts

Custom Rubber Washer Service Description:
Melon Rubber specializes in custom-designed and standard rubber washers, including square rings and washers. With over 10 years of expertise, we manufacture a diverse range of rubber washers and seals tailored to meet specific customer needs. Our products are crafted from both natural and synthetic rubbers such as Neoprene, silicone, Buna-N, Santoprene, and EPDM, ensuring top performance across various applications.

In-Depth Introduction to Bonded EPDM/Neoprene Washers and Their Applications

Bonded washers, commonly referred to as sealing or cushioning washers, play a crucial role in engineering and manufacturing sectors. These washers are specifically designed to ensure an airtight seal between fastening elements (such as bolts and screws) and hard surfaces. The primary functions of these washers include distributing stress, strengthening joints for high-torque applications, and providing cushioning to protect the joint against the hard surface.

Materials and Properties

1. EPDM Bonded Washers:

   • Material Composition: Ethylene Propylene Diene Monomer (EPDM) rubber is known for its outstanding weather resistance, heat stability, and durability. When bonded with metal, these washers offer enhanced sealing capabilities.
   • Temperature Resistance: EPDM maintains its properties in temperatures ranging from -50°C to +150°C, making it ideal for outdoor applications.
   • Applications: Commonly used in roofing, automotive (for sealing doors, windows, and other systems), and HVAC systems due to their excellent environmental resistance.

2. Neoprene Bonded Washers:

   • Material Composition: Neoprene or polychloroprene is a type of synthetic rubber that is versatile, chemical resistant, and weather-resistant.
   • Temperature and Chemical Resistance: It can effectively withstand a wide temperature range and exposure to oils, solvents, and other chemicals.
   • Applications: Due to their robust properties, neoprene washers are used in marine applications, chemical processing equipment, and outdoor fixtures.

Why Choose Melon Rubber:

Benefit from our commitment to quality and customization. Whether you need a small batch of specialized seals or large-scale production of standard washers, Melon Rubber is equipped to deliver with precision and reliability. Enhance your assembly with our washers that promise longevity and optimal sealing performance.
A full selection of natural and synthetic rubber washers, including those made from Neoprene, silicone, Buna-N, Santoprene, and EPDM.

Materials Used in Rubber Silicone Washers:

Choosing the Right Washer

Selecting the right bonded washer depends on several factors:

• Environmental Conditions: Consider the chemical exposure, temperature, and weather conditions the washer will face.
• Load Requirements: Depending on the mechanical loads and stress, choose a washer that can withstand the specific conditions.
• Compatibility: Ensure that the materials of the washer are compatible with the materials of the surfaces they will be in contact with.

Bonded EPDM and Neoprene washers are indispensable in industries where seals are critical to the functionality and longevity of products. Their ability to resist harsh environments while providing a tight seal makes them invaluable in many technical applications across various sectors

Manufacturing Processes

Bonded washers are produced through a process that involves the bonding of rubber to a metal substrate. The two main methods include:

1. Adhesive Bonding: This involves applying a strong adhesive that can resist environmental factors to adhere the rubber to the metal. This method is cost-effective and suitable for a variety of applications where moderate stress resistance is sufficient.

2. Vulcanization Bonding: In more demanding applications, the rubber is chemically bonded to the metal during the vulcanization process, which involves heating the rubber to form cross-link bonds with the metal. This method provides a stronger, more durable bond that is ideal for high-stress applications.

Advantages of Bonded Washers

• Leak Proof and Sealing Performance: The combination of rubber and metal in bonded washers provides superior sealing properties, preventing leaks even under high pressure.
• Stress Distribution: The metal part of the washer helps distribute the load evenly, which is vital in preventing damage to the surface and ensuring the integrity of the assembly.
• Vibration and Noise Dampening: The rubber material helps absorb vibrations and reduce noise, which is crucial in machinery and automotive applications.

About Us:

Melon, as a recognised experienced rubber factory enable ,The production base covers an area of 20,000 square meters.has two floors of 100,000-class dust-free workshops, and more than 20 senior engineers.

us to advise our customer of the mostsuitable rubber or silicone or plastic moulding parts to be used for their application. Our engineerwork closely with your design engineers and we help ensure your products meet specification. 

Our inhouse specialists can advise on material selection, including:NR/SBR/EPDM/SIR/CR/SBR/IIR/HNBR/FKM/PU.Melon has continually implemented newtechnologies to meet the changing needs of our customers.At present, it has obtained more than100 patents in the industry. 


The company has passed ISO9001 and industry-related quality system certification (ISO13485, SIRAICTl),One-stop solution, together with competitive price and professional service. This is what we cangive by having a thorough ERP system monitoring every process of raw material tracking , projectR&D, quality inspection, warehouse inventory,Throughout the whole path, we value the recognitionand supports of our customers and are wiing to provide more value-added services in return.

Punctuality and know-how, dedication and skilled people are the solid basis for our many years of successful operation.

Innovation and investment in advanced equipment and new applications are the driving forces for the common success.

We expect to work with your esteemed company to realize mutual growth!