What is an EPDM Seal Strip?
Saturday, February 7, 2026
Key Properties & Advantages
| Property | Advantage & Performance |
|---|---|
| Superior Weather Resistance | Excellent resistance to ozone, UV radiation, and oxidation without cracking. Performs reliably outdoors for 15-20+ years. |
| Wide Temperature Range | Effective from -40°C to +120°C continuously, with short peaks up to 150°C. |
| Water & Steam Resistance | Impermeable to water; handles hot water and low-pressure steam effectively. |
| Good Chemical Resistance | Resists polar fluids, acids, alkalis, detergents, and phosphate esters. |
| Excellent Elasticity & Recovery | Low compression set (25-35% typical); maintains seal after repeated compression. |
| Electrical Insulation | Good dielectric properties for many electrical applications. |
| Color Options | Primarily black (carbon-filled for UV protection), but available in limited colors. |
Common Profile Types
- Solid D-Profile: For general compression sealing
- Sponge/Closed-Cell Foam: For low-pressure sealing and thermal/acoustic insulation
- Hollow Bulb Seals (P, D, E shapes): For effective weather-sealing with low closure force
- Self-Adhesive Strips: With acrylic or rubber-based adhesive backing
- Dense Sponge: A mid-density option balancing sealability and cost
Primary Applications by Industry
1. Construction & Building (Largest Market)
- Window & Door Weatherstripping: Perimeter seals for residential and commercial units
- Roofing & Flashing Seals: Around penetrations, expansion joints, and parapets
- Curtain Wall & Glazing Gaskets: Static seals in storefronts and facades
- Garage & Overhead Door Seals: Bottom and perimeter seals
- Expansion Joint Covers: In sidewalks, plazas, and building joints
2. Automotive & Transportation
- Door Seals: Primary and secondary seals on vehicle doors (often sponge-over-solid design)
- Trunk/Hatch Seals: Perimeter seals for rear closures
- Window Seals: Glass run channels and beltline seals
- HVAC Seals: Duct connections and air intake seals
- Bus/RV Seals: Door and window seals for commercial vehicles
3. HVAC & Refrigeration
- Ductwork Seals: Connections between duct sections
- Air Handler Gaskets: Access panels and component seals
- Refrigerator/Freezer Doors: Gaskets for commercial units
- Cooling Tower Seals: Panel and access door gaskets
4. Industrial & Electrical
- Enclosure Seals: Control panels, junction boxes (NEMA 4, IP54-65 ratings)
- Machinery Guards: Seals for removable safety panels
- Conveyor Covers: Strip curtains and enclosure seals
- Tank & Vessel Seals: Access covers and manway gaskets
5. Consumer & Appliance
- Appliance Doors: Washing machines, dishwashers, dryers
- Recreational Equipment: RV, boat, and trailer components
- Outdoor Furniture: Cushioning and protective seals
- Gardening Equipment: Greenhouse and garden shed seals
Material Grades & Formulations
| Grade Type | Key Characteristics | Typical Applications |
|---|---|---|
| Standard Black | Carbon-filled for optimal UV protection | Outdoor construction, automotive exterior |
| Closed-Cell Sponge | Low density, excellent compressibility | Thermal insulation, low-pressure seals |
| Dense Sponge | Medium density, better durability | Door seals, enclosure gaskets |
| Solid EPDM | High density, maximum durability | High-wear areas, mechanical seals |
| Food-Grade | FDA-compliant formulations | Food processing equipment |
| High-Mooney Grades | Higher viscosity for complex extrusions | Intricate automotive profiles |
