Custom EPDM gaskets are used for environmental sealing and electrical insulation. Learn how Elasto Proxy custom fabricates EPDM profiles into finished EPDM rubber gaskets. Then, download the Sealing Essentials E-Book.
EPDM gaskets provide reliable, long-lasting environmental sealing in outdoor applications where sunlight, ozone, weather, and temperature extremes can challenge product designs. A type of synthetic rubber, ethylene propylene diene monomer (EPDM) is also a good electrical insulator. Suppliers offer molded and extruded EPDM rubber in a variety of stock forms (such as sheets and profiles), and custom fabricators create finished gaskets in different shapes and sizes.
Advantages of EPDM Rubber
EPDM rubber offers numerous advantages over other elastomers. With a temperature range of -40° to 150° C, this synthetic material is suitable for outdoor use in both hot and cold climates. Compared to other gasket materials, EPDM is also extremely resistant to wear and aging. Manufacturers have used EPDM for many years, and this non-metallic material’s properties are well-understood. While providing reliable sealing over a long period of time, color-stable EPDM rubber won’t stain what it’s supposed to seal either.
Applications for EPDM Gaskets
EPDM gaskets provide environmental sealing for a variety of residential, commercial, and industrial applications. In the building and construction industry, they’re used for HVAC ducts, expansion joints, weather stripping, door and window seals, wall cladding, and curtain walls. EPDM gaskets are also a good choice for sealing outdoor enclosures. Because this synthetic rubber is also an electrical insulator, EPDM is used in cable couplings, compressors, and electrical equipment.
Types of EPDM Profiles
EPDM rubber can be molded into custom parts and sheets, or extruded into profiles for cost-effective custom fabrication. Compounders and material suppliers create EPDM profiles from sponge rubber and solid rubber in many different shapes, dimensions, and durometers (hardness). Specific profile types include C-channels, E-strips, J-seals, round and square cords, P-channels, U-channels, quad, strips, and zipper strips. Both open cell and closed cell EPDM sponge rubber is available.
Water Jet Cutting for Custom EPDM Gaskets
EPDM profiles can be cut-to-size via die cutting, water jet cutting, and other methods. Water jet cutting is an excellent choice because this custom fabrication technique creates fast, precise cuts without long lead times or tooling charges. Here at Elasto Proxy, our water jet machine can make cuts as small as 1/2” x 1/2” and can create holes with diameters as small as 0.01”. Smooth joints, dovetail cuts, and perfect 90-degree corners are additional benefits that water jet cutting provides.
Splicing for EPDM Gasketing
Unlike guillotine cutting, water jet technology produces clean, non-beveled edges that are easy to bond. Elasto Proxy offers several different splicing solutions. Choices include film splicing, cold bonding, C-press injection molding, and vulcanizing. Each has advantages. For example, film splicing joins EPDM profiles without adhesives and does not require secondary trimming. Cold bonding creates angled parts. C-press molding is a good choice for square gaskets with radiused corners. Vulcanization is used for low quantities.
Taping for Bonded EPDM Gaskets
As a custom fabricator of specialty sealing and custom insulation solutions, Elasto Proxy can also supply taped or bonded EPDM gaskets. For outdoor applications, 3M’s heat activated taping system (HATS) is a good choice because HATS has strong weatherstripping capabilities. Pressure sensitive adhesive (PSA) tape is recommended for applications with rough or porous surfaces. No matter which type of taping you chose, you’ll find that Elasto Proxy’s bonded gaskets arrive ready to install right out-of-the-box.
Solve Your Sealing Challenges
Sealing challenges are complex and no two applications are the same. Do you need EPDM gaskets, or is another type of rubber seal a better choice? Plus, what about seal geometry, industry standards, and vendor selection? They’re important to consider, too. To make the right decisions, you need a resource you can trust from a partner with experience. Download Elasto Proxy’s Sealing Essentials e-book today.
Clyde Sharpe General Manager at Elasto Proxy