EPDM Sponge Rubber O Ring Cord Seal

Category： EPDM PVC products for auto
Product description：Foam Sponge silicone rubber cord plays a crucial part in sealing gap throughout a multitude of different industrial sectors. It seals against any ingress of water or air. Sponge strip have a closed
INQUIRY EMAIL

Our EPDM sponge O ring cord is extruded closed-cell foam rubber profile specially designed to be cut and spliced into custom foam O-rings for universal sealing gaps. Made of premium EPDM ethylene propylene diene rubber, this sponge rubber cord delivers outstanding weather resistance, ozone & UV stability, soft compressibility and excellent thermal insulation. Unlike solid rubber cord, the cellular sponge structure creates tight airtight, watertight seals with low compression force, ideal for uneven surfaces, door frames, machinery enclosures and automotive weatherstripping. As a professional China rubber manufacturer, we supply full-size EPDM foam cord rolls, support hot vulcanized or cold-glued custom sponge o rings for global industrial, construction and automotive buyers.

Key Advantages of Closed-Cell EPDM Foam Rubber Cord

1.Superior Weather & UV Resistance: EPDM sponge cord withstands long-term sunlight, rain, ozone aging without cracking or hardening, perfect for outdoor sealing.
2.Soft High Compressibility: Closed-cell foam structure fits irregular gaps, requires little clamping pressure to form full seal, reduces equipment assembly stress.
3.Waterproof, Dustproof & Sound Insulation: Dense micro foam cells block water, dust and noise transmission, works as gap filler and vibration buffer.
4.Wide Temperature Adaptability: Stable performance from -40°C to 120°C, resistant to steam and temperature fluctuation.
5.Easy to Make Custom O Rings: Sponge EPDM cord can be cut to exact length, jointed via hot vulcanization or adhesive glue to form any diameter foam o ring.
6.Flexible & Elastic Recovery: Rebounds quickly after repeated squeezing, maintains sealing performance for years of cyclic compression.
7.Chemical Resistant: Tolerates dilute acid, alkali, water and steam; not suitable for mineral oil (NBR sponge cord optional for oil contact).
8.Customizable Sizes & Colors: Standard diameters 2mm–30mm, black as default; white, gray, red EPDM sponge cord available on request.

Technical Specifications

EPDM Sponge O Ring Cord Parameters

Raw Material: Closed-cell EPDM sponge rubber
Density: 0.5–0.7 g/cm³
Cross Section: Solid round cylindrical cord
Diameter Range: 2mm / 3mm / 5mm / 8mm / 10mm / 12mm / 15mm / 20mm / 25mm / 30mm (custom sizes acceptable)
Temperature Range: -40℃ ~ +120℃
Hardness: 20–40 Shore A (soft sponge grade)
Cell Structure: Closed cell (low water absorption)
Processing Service: Extruded long rolls, cutting, cold glue splicing, hot vulcanized foam o-rings
Standard Color: Black
Roll Length: 100m / 200m / 500m per coil

Where to Use EPDM Sponge Foam O Ring Cord

Our versatile EPDM sponge o ring cord is widely used to fabricate custom foam sealing rings across multiple industries:

Automotive Industry: Car door, trunk, window weather seal foam rings; RV, boat hatch gap sealing o-rings.
Construction & Doors/Windows: Aluminum window, cabinet door, container door weatherproof sponge o ring gaskets.
Industrial Machinery: Equipment cabinet, electrical box, pump housing dust & water sealing foam o-rings, vibration damping buffer cord.
HVAC & Refrigeration: Air duct gap filler, cabinet thermal insulation foam cord rings.
Marine & Outdoor Equipment: Outdoor enclosures, lighting fixture waterproof sponge o-rings resistant to salt fog.
Building Joint Backer Rod: Used as expansion joint filler for concrete walls and curtain walls.

Why Choose Our EPDM Sponge Rubber Cord

Factory Advantages for Global Wholesale Buyers

Professional EPDM Extrusion Factory: Independent sponge foaming & vulcanization workshop, stable quality control for every foam cord roll.
Full Custom OEM & ODM: Custom diameter, length, color; produce finished spliced sponge o rings per your drawing/sample.
Strict Raw Material Inspection: Only virgin EPDM compound, no recycled filler, guarantee long anti-aging service life.
Two O-Ring Splicing Technology: Hot vulcanized joint (no gap, durable) and cold glue joint (low cost for small orders) available.
Bulk Competitive Factory Price: Large daily output, support small trial MOQ and mass container orders, fast lead time.
Complete Test Reports: Provide material data sheets, aging test certificates, RoHS compliance files for industrial customers.
Eco-Friendly Formula: Non-toxic, odorless EPDM sponge, meets international environmental standards.

Frequently Asked Questions About EPDM Sponge O Ring Cord

Q1: What is EPDM sponge o ring cord used for?

A: It is soft extruded foam rubber rope cut and jointed into custom foam o-rings for weatherproof, dustproof, sound insulation and gap filling sealing, widely used on auto, construction doors, machinery cabinets and outdoor equipment.

Q2: Can I get finished foam o-rings instead of raw cord rolls?

A: Yes. We provide two splicing processes: hot vulcanized seamless sponge o-rings and cold glued o-rings, any inner diameter size customized.

Q3: Is EPDM sponge cord oil resistant?

A: Standard EPDM sponge resists water, steam, UV but not mineral oil. If oil contact is required, we supply NBR nitrile sponge cord as alternative.

Q4: How long does EPDM foam sponge seal last outdoors?

A: Premium EPDM closed-cell sponge features excellent ozone & UV resistance, stable performance over 5–8 years under outdoor sunlight exposure without cracking.

Q5: What size diameters of EPDM sponge cord do you stock?

A: Regular stock diameters from 2mm to 30mm; larger or tiny special sizes can be customized via extrusion mold opening.