Product Overview
Reliable custom rubber parts for industrial applications
Quick Answer
Custom EPDM container door seals are available in ten reference profiles with stated widths from 19 mm to 88 mm. The standard specification includes black EPDM, 70 ±5 Shore A hardness, 10 MPa tensile strength, and RMA E2 cross-sectional tolerance.
EPDM container door seals and extruded rubber profiles are black sealing sections installed around cargo container door frames. Ten reference profiles are available with stated widths from 19 mm to 88 mm. The confirmed standard compound is EPDM, 70 ±5 Shore A, with profile-specific dimensions listed below.
Product Overview
EPDM container door seals are extruded profiles designed to follow cargo door edges and form a compressed sealing interface when the doors close. The ten reference profiles use different widths, heights, mounting channels, and sealing-lip arrangements for different frame positions and installation structures. Confirmed reference widths range from 19 mm to 88 mm. The standard specification is black EPDM with a hardness of 70 ±5 Shore A. Profile selection should be based on the retaining channel, mating surface, available clearance, compression direction, and corner configuration. Extrusion tooling, cut length, joining method, dimensional tolerance, and packaging must be confirmed before production.
Size / Dimensions
| Profile | Reference Width | Height A | Height B | Additional Confirmed Dimensions |
|---|---|---|---|---|
| Profile 01 | 57 mm | 50 mm | 33 mm | Not specified |
| Profile 02 | 23 mm | 42 mm | 30 mm | Not specified |
| Profile 03 | 75 mm | 40 mm | 60 mm | Not specified |
| Profile 04 | 88 mm | 42 mm | 50 mm | Not specified |
| Profile 05 | 47 mm | 47 mm | 32 mm | Not specified |
| Profile 06 | 70 mm | 47 mm | 39 mm | Not specified |
| Profile 07 | 30 mm | 35 mm | 45 mm | Not specified |
| Profile 08 | 43 mm | 42 mm | 21 mm | Not specified |
| Profile 09 | 19 mm | 32 mm | 43.5 mm | Upper sections: 15.5 mm and 27 mm; lower section: 14 mm; indicated thickness: 2.5 mm |
| Profile 10 | 45 mm | 50 mm | 25 mm | Secondary width: 35 mm; upper sections: 31 mm and 18 mm; lower section: 14 mm; indicated thicknesses: 6 mm and 5 mm |
All values are stated in millimeters. Height A and Height B correspond to the two orientation-specific vertical dimensions shown for each profile. Profile 09 and Profile 10 reference dimensions were converted from centimeters to millimeters.
Product Specifications
| Specification | Details |
|---|---|
| Product Name | EPDM Container Door Seal and Extruded Rubber Profile |
| Available Reference Profiles | Profiles 01–10 |
| Reference Width Range | 19–88 mm, depending on profile |
| Material | EPDM |
| Hardness | 70 ±5 Shore A as standard or per request |
| Color | Black as standard; other colors available upon request |
| Specific Gravity | 1.2–1.35 g/cm³ |
| Tensile Strength | 10 MPa |
| Temperature Range | −40°F to 248°F, equivalent to −40°C to 120°C |
| Cross-Sectional Tolerance | RMA Standard Cross-Sectional Tolerance E2 or per request |
| Manufacturing Process | Rubber extrusion |
| Application | Cargo container door frame sealing |
| Customization | Cross-section, dimensions, hardness, color, cut length, joining method, tolerance, and packaging |
| MOQ | Available upon request |
| Tooling | Extrusion die requirements to be confirmed after profile evaluation |
| Sample Availability | Available upon request |
| Lead Time | 25 days |
| Compliance Options | Available upon request |
Key Features
- Extruded from EPDM rubber compound, offering excellent resistance to ultraviolet exposure, ozone, and general weathering across extended outdoor service life.
- Available in J-type and H-type profile designs, matched to standard dry cargo containers and specialized refrigerated or high-cube container applications.
- Typical hardness around 70 Shore A, balancing firm structural retention with sufficient flexibility to maintain consistent sealing pressure.
- Manufactured to standard container dimensions, including common 20-foot and 40-foot general purpose and high-cube container door sizes.
- Vulcanized corner joints in complete frame sets, providing a continuous, gap-free seal around the entire door perimeter.
- Custom sizing and profile options available according to specific drawings or physical samples for non-standard container designs.
Why EPDM Is the Standard Material for Container Sealing
EPDM rubber has become the dominant material choice for container door seals because it delivers a combination of properties uniquely suited to the demanding conditions of international shipping and long-term outdoor storage. The material maintains flexibility and sealing performance across a wide temperature range, generally from around -40 degrees Celsius to 120 degrees Celsius, allowing the same seal design to perform reliably whether a container is crossing tropical shipping lanes or enduring sub-zero storage yard conditions. EPDM’s strong resistance to saltwater exposure, ultraviolet degradation, and ozone further supports long service life in the harsh marine and outdoor environments where shipping containers spend the majority of their operational lifespan, reducing the frequency of seal replacement compared to less weather-resistant rubber compounds.
J-Type Versus H-Type Profile Selection
Selecting between J-type and H-type profiles depends primarily on the specific container type and the level of sealing performance required for the application. J-type profiles remain the most widely used option for standard dry cargo containers, offering a cost-effective, easy-to-install solution that provides reliable protection against water and dust intrusion under typical shipping conditions. H-type profiles are generally reserved for refrigerated containers and other specialized equipment where maintaining a controlled internal temperature makes the additional double-sealing barrier a meaningful performance advantage, helping to minimize thermal exchange and moisture infiltration around the door opening.
Installation and Long-Term Performance Considerations
Proper installation of extruded container door seals typically involves securing the profile to the door frame using a combination of mechanical fastening and adhesive bonding, with manufacturers commonly recommending fast-curing adhesives formulated specifically for EPDM bonding to ensure a durable, weather-resistant attachment. Surface preparation before adhesive application plays an important role in installation quality, since contaminants or residue on the door frame can compromise adhesion and lead to premature seal detachment under the constant vibration and flexing containers experience during transport. Because these seals directly determine how effectively a container protects its cargo from environmental damage, periodic inspection for cracking, compression set, or detachment is recommended as part of routine container maintenance programs, particularly for containers in continuous long-term service.
Common Applications
- Dry cargo shipping container door sealing for standard 20-foot and 40-foot general purpose containers.
- Refrigerated and reefer container door sealing, where H-type double-seal profiles help maintain internal temperature control.
- Railway container and intermodal transport equipment requiring reliable, long-term weather sealing performance.
- Container repair and refurbishment programs replacing worn or damaged original door seals to restore watertight integrity.
- Custom storage container and specialized logistics equipment requiring tailored extruded profile dimensions.
Customization and Manufacturing
A container door seal can be selected from the ten reference profiles or developed with a different application-specific cross-section. Technical evaluation should cover the overall width and height, mounting-channel dimensions, lip geometry, wall thickness, compression direction, corner configuration, and cut length. Material, Shore A hardness, color, dimensional tolerance, surface condition, identification, joining method, and packaging can also be specified. A dedicated extrusion die may be required when an existing profile does not match the installation. Prototype lengths or joined samples can be evaluated for dimensions, channel fit, door closure, compression, corner assembly, and surface condition before mass-production approval.
Quality and Sourcing Considerations
Before ordering, confirm the required profile number, material, hardness, dimensions, dimensional tolerances, cut lengths, corner configuration, installation method, and quantity. Critical inspection items may include overall width, Height A, Height B, wall and lip thickness, mounting-channel geometry, cut length, surface condition, splice quality, and batch identification. Measurement methods should be agreed because flexible extruded profiles can deform under excessive measuring force. Packaging should prevent sharp bending, compression, contamination, or permanent distortion during transportation and storage. Sample approval, compound requirements, inspection records, labeling, compliance documents, and batch consistency expectations should be defined before mass production.
Frequently Asked Questions
How many container door seal profiles are available?
Ten reference profiles are listed with confirmed dimensional information. Their reference widths range from 19 mm to 88 mm, and each profile has a different height and sealing-lip arrangement. Final selection must be based on the actual door channel and compression geometry.
Can the container door seal cross-section be customized?
Yes. The overall width, height, mounting channel, sealing lips, wall thickness, compression geometry, and cut length can be evaluated according to the door structure. Complete dimensional information or a physical profile sample is required to confirm extrusion feasibility and tooling requirements.
What is the standard material and hardness?
The confirmed standard material is EPDM with a hardness of 70 ±5 Shore A. Black is the standard color, while other colors are available upon request. Any alternative compound or hardness must be reviewed according to the installation and service conditions.
What information is required to match an existing seal?
Please provide the profile number or complete cross-section, mounting-channel geometry, cut length, installation position, compression direction, corner configuration, and a physical sample where possible. Photographs alone are normally insufficient to confirm wall thickness, lip geometry, fit, and dimensional tolerances.
What dimensional tolerance applies to these profiles?
The confirmed standard is RMA Cross-Sectional Tolerance E2 or a project-specific tolerance. Critical dimensions and measurement methods should be identified before tooling because flexible profiles can change shape under measuring force. Cut-length and joined-frame tolerances should be agreed separately.
Can the profiles be supplied as cut lengths or joined seals?
Cut-length and joining requirements are available upon request. Please specify the required length, corner arrangement, joint position, joining method, and finished configuration. Manufacturing feasibility and tolerances depend on the cross-section, profile flexibility, seal dimensions, and assembly requirements.
Request Product Evaluation
Provide the required profile number, container door seal cross-section, complete dimensions, physical sample, installation channel, compression direction, cut length, corner configuration, and estimated quantity. Include the operating environment, tolerance, inspection, compliance, joining, and packaging requirements so that tooling, sampling, manufacturing feasibility, and quotation details can be evaluated accurately.
