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Description
Self-Adhesive Sponge Rubber Strip — 5mm Thick
A premium-grade, expanded closed cell EPDM sponge rubber strip with a factory-applied self-adhesive backing. Supplied in a 10-metre roll and available in ten widths from 10mm to 100mm, this versatile strip is engineered for professional sealing, cushioning, vibration damping, and weatherproofing across a wide range of commercial, industrial, and DIY applications — including vehicles, caravans, boats, windows, doors, and machinery.
At a Glance
Material
Expanded Closed Cell EPDM / Neoprene Sponge
Colour
Black
Thickness
5mm (Tolerance: ± 0.5mm)
Roll Length
10 metres per roll
Available Widths
10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 75mm, 100mm
Adhesive
Self-adhesive one side — removable yellow or white backing paper
Operating Temperature
-40°C to +70°C
Hardness
36° Shore 00 (± 5°)
Density
120 kg/m³ (± 20)
Cell Structure
Expanded Closed Cell — Waterproof
Available Sizes
Select Your Width — All Rolls 5mm Thick x 10m Long
| Width | Thickness | Length | Full Dimensions |
|---|---|---|---|
| 10mm | 5mm | 10m | 10mm x 5mm x 10m |
| 12mm | 5mm | 10m | 12mm x 5mm x 10m |
| 15mm | 5mm | 10m | 15mm x 5mm x 10m |
| 20mm | 5mm | 10m | 20mm x 5mm x 10m |
| 25mm | 5mm | 10m | 25mm x 5mm x 10m |
| 30mm | 5mm | 10m | 30mm x 5mm x 10m |
| 40mm | 5mm | 10m | 40mm x 5mm x 10m |
| 50mm | 5mm | 10m | 50mm x 5mm x 10m |
| 75mm | 5mm | 10m | 75mm x 5mm x 10m |
| 100mm | 5mm | 10m | 100mm x 5mm x 10m |
* Delivered as a neatly coiled roll. Width tolerance applies due to the compressible nature of the material.
Technical Specifications
Expanded Closed Cell Sponge — Performance Data
| Property / Requirement | Specification | Test Method |
|---|---|---|
| Material Composition | Expanded EPDM / Neoprene Closed Cell Sponge | — |
| Colour | Black | — |
| Cell Structure | Expanded Closed Cell (Waterproof) | — |
| Thickness | 5mm | — |
| Thickness Tolerance | ± 0.5mm | — |
| Sheet Size — Skin/Skin (mm) | 2000 x 1000 x 54 (± 4) | — |
| Hardness (Shore 00 Scale) | 36° ± 5° | — |
| Density (kg/m³) | 120 ± 20 | — |
| Operating Temperature Range | -40°C to +70°C | — |
| Tensile Strength (kPa) | 400 ± 10% | ASTM D 3575 : 2008 |
| Elongation at Break (%) | 120 ± 10% | ASTM D 3575 : 2008 |
| Compression Set (50%, 22h, 20°C) | 25% max. | ASTM D1056-00 |
| Compression @ 25% Deflection (kPa) | 45 ± 10% | ASTM D1056 : 2007 |
| Compression @ 50% Deflection (kPa) | 100 ± 10% | ASTM D1056 : 2007 |
| Water Absorption — max. change in weight (%) | 4 ± 10% | ASTM D1056 : 2007 |
| Heat Ageing (100°C, 72h) — change in tensile strength | 25 ± 10% | ASTM D 1056 : 2007 |
| Heat Ageing (100°C, 72h) — change in elongation | -15 ± 10% | ASTM D1056 : 2007 |
| Flammability — FMVSS 302 | Burn Rate < 100mm/min — Pass | FMVSS 302 |
| Flammability — UL94 HBF | Pass | UL94 HBF |
| Resistance to Air & UV Light | Excellent | — |
| Resistance to Acids | Good | — |
| Resistance to Oil / Petrol / Solvents | Poor — not recommended | — |
| Environmental | CFC and HFC Free — Recyclable | — |
| Adhesive Side | One side — removable yellow or white backing paper | — |
| Supply Format | Coiled roll | — |
Dimensional Tolerances
| Dimension | Tolerance |
|---|---|
| Thickness — 5mm | ± 0.5mm |
| Width | Small tolerance applies* |
* Due to the compressible nature of closed cell sponge, a small tolerance in width may be present. All figures are average values.
Key Features
- ✓ Expanded closed cell structure — fully waterproof and resistant to moisture ingress
- ✓ Self-adhesive on one side — peel-and-stick installation on clean, smooth, dry surfaces
- ✓ Excellent UV and weathering resistance — suitable for long-term outdoor exposure
- ✓ Wide operating temperature range: -40°C to +70°C
- ✓ Compressible and flexible — conforms to irregular surfaces for a reliable seal
- ✓ Good resistance to acids and airborne contaminants
- ✓ CFC and HFC free — environmentally responsible and recyclable
- ✓ Available in 10 widths from 10mm to 100mm — all 5mm thick, 10m per roll
- ✓ Passes FMVSS 302 and UL94 HBF flammability standards
Applications
Where This Strip Performs
Weatherproofing & Sealing
Sealing gaps around windows, doors, hatches, and panels to prevent draughts, dust, and water ingress.
Sound & Vibration Damping
Reducing noise transmission and mechanical vibration in vehicles, machinery, and industrial enclosures.
Cushioning & Impact Protection
Protecting surfaces from impact, abrasion, and wear — ideal for bumpers, edge guards, and protective pads.
Non-Slip & Anti-Vibration
Providing grip and stability under equipment, trays, and fixtures in high-movement environments.
Automotive & Transport
Suitable for use in cars, vans, trucks, trailers, caravans, and boats — resists road vibration and moisture.
General Industrial & DIY
Versatile enough for workshops, construction sites, home improvement projects, and bespoke fabrication.
Installation Guidance
For Best Adhesion Results
- 1. Ensure the application surface is clean, dry, smooth, and free from oil, grease, and dust.
- 2. Peel back the yellow or white release liner to expose the adhesive.
- 3. Apply the strip firmly along the desired surface, pressing evenly along its full length.
- 4. Allow a short dwell time before subjecting the joint to compression or movement.
Frequently Asked Questions
What widths are available for the 5mm thick sponge rubber strip?
This strip is available in ten widths: 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 75mm, and 100mm. All options are 5mm thick and supplied as a 10-metre roll. Select your preferred width from the menu above.
Is this sponge strip suitable for outdoor use?
Yes. The expanded closed cell EPDM construction provides excellent resistance to UV light, weathering, and moisture, making it well suited to outdoor sealing applications on windows, doors, vehicles, and marine environments.
What temperature range can this strip withstand?
The strip operates reliably between -40°C and +70°C, covering the full range of typical UK weather conditions as well as demanding industrial and automotive environments.
How do I prepare the surface before applying the strip?
The surface must be clean, dry, smooth, and completely free of oil, grease, and dust. Proper surface preparation is essential for the self-adhesive backing to bond effectively and maintain a long-lasting seal.
Can this strip be used on caravans, boats, or vehicles?
Yes — it is widely used in automotive, caravan, marine, and transport applications for sealing, vibration damping, and cushioning. Its waterproof closed cell structure and UV resistance make it particularly effective in these environments.
Is the material resistant to petrol or solvents?
No. This sponge rubber strip has poor resistance to oil, petrol, and solvents and should not be used in direct contact with these substances. It performs well against acids, UV light, air, and general weathering.
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