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Description
Self-Adhesive Sponge Rubber Strip — 3mm Thick
A precision-cut, closed-cell sponge rubber strip with a factory-applied self-adhesive backing, supplied in a 10-metre coiled roll. Engineered for weatherproofing, sealing, cushioning, and vibration control across commercial, industrial, and DIY applications — from window and door perimeters to vehicle interiors, caravans, boats, and fabrication assemblies. Simply peel, position, and press for an instant, durable bond.
Available Sizes — Width Selection
10mmwide × 3mm thick × 10m
12mmwide × 3mm thick × 10m
15mmwide × 3mm thick × 10m
20mmwide × 3mm thick × 10m
25mmwide × 3mm thick × 10m
30mmwide × 3mm thick × 10m
40mmwide × 3mm thick × 10m
50mmwide × 3mm thick × 10m
75mmwide × 3mm thick × 10m
100mmwide × 3mm thick × 10m
Select your required width from the option menu above. All sizes are supplied as a 10-metre coiled roll.
Material & Key Properties
Material
Expanded Closed-Cell EPDM / Neoprene Sponge
Colour
Black
Thickness
3mm (Tolerance: ± 0.3mm)
Length per Roll
10 metres
Hardness
36° Shore 00 (± 5°)
Density
120 kg/m³ (± 20)
Operating Temperature
−40°C to +70°C
Cell Structure
Expanded Closed Cell — Waterproof
Adhesive Backing
Self-adhesive one side; removable yellow/white liner
Supply Form
Coiled Roll
Environmental
CFC & HFC Free — Recyclable
Flammability
FMVSS 302 Pass (Burn Rate < 100mm/min)
Technical Specification
| Requirement / Specification | Specification Limits | Test Method |
|---|---|---|
| Compression @ 25% Deflection | 45 kPa (± 10%) | ASTM D1056 : 2007 |
| Compression @ 50% Deflection | 100 kPa (± 10%) | ASTM D1056 : 2007 |
| Compression Set (50%, 22h, 20°C) | 25% max. | ASTM D1056-00 |
| Shore Hardness (00 Scale) | 36° ± 5° | — |
| Density | 120 kg/m³ (± 20) | — |
| Tensile Strength | 400 kPa (± 10%) | ASTM D3575 : 2008 |
| Elongation at Break | 120% (± 10%) | ASTM D3575 : 2008 |
| Water Absorption (max. change in weight) | 4% (± 10%) | ASTM D1056 : 2007 |
| Heat Ageing (100°C, 72h) — Change in Tensile Strength | 25% (± 10%) | ASTM D1056 : 2007 |
| Heat Ageing (100°C, 72h) — Change in Elongation | −15% (± 10%) | ASTM D1056 : 2007 |
| Operating Temperature Range | −40°C to +70°C | — |
| Flammability — FMVSS 302 | Burn Rate < 100mm/min | Pass |
| Flammability — UL94 HBF | N/A | Pass |
| Resistance to Air & UV | Excellent | — |
| Resistance to Acids | Good | — |
| Resistance to Oil | Poor | — |
| Environmental | CFC & HFC Free / Recyclable | — |
Dimensional Tolerances
| Width Range | Width Tolerance |
|---|---|
| 10mm – 25mm | ± 1.0 mm |
| 25.1mm – 100mm | ± 1.5 mm |
| Thickness | Thickness Tolerance |
|---|---|
| 3mm | ± 0.3 mm |
Resistance Profile
| Property | Rating |
|---|---|
| Air & UV Light | Excellent |
| Weathering & Ozone | Excellent |
| Water / Moisture | Excellent (Closed Cell — Waterproof) |
| Acids | Good |
| Oil & Petroleum Solvents | Poor — not recommended |
Typical Applications
WeatherproofingSealing around windows, doors, hatches, and frames to prevent draughts, water ingress, and dust infiltration.
Sound DampingReducing airborne and structure-borne noise in panels, enclosures, and vehicle cabins.
Vibration IsolationAbsorbing mechanical vibration in machinery mounts, equipment bases, and vehicle components.
Cushioning & Impact ProtectionProtecting surfaces and components from impact, abrasion, and contact damage.
Non-Slip PadsProviding grip and anti-slip performance on shelving, trays, and work surfaces.
Vehicle & Marine UseSuitable for caravans, motorhomes, boats, cars, vans, trucks, and trailers.
Gasketing & SealingCreating compression seals in enclosures, junction boxes, and fabricated assemblies.
DIY & TradeVersatile strip for general-purpose sealing, padding, and protection tasks across building and maintenance trades.
Installation & Usage Notes
* Ensure the application surface is clean, dry, smooth, and free from oil, grease, and dust before bonding.
* Peel the release liner and apply firm, even pressure along the full length of the strip for maximum adhesion.
* This material is not recommended for direct or prolonged contact with petrol, mineral oils, or hydrocarbon solvents.
* Due to the compressible nature of sponge rubber, minor tolerances in width and thickness are inherent to the material. All figures stated are average values — we recommend verifying suitability for your specific application before use at scale.
* Ensure the application surface is clean, dry, smooth, and free from oil, grease, and dust before bonding.
* Peel the release liner and apply firm, even pressure along the full length of the strip for maximum adhesion.
* This material is not recommended for direct or prolonged contact with petrol, mineral oils, or hydrocarbon solvents.
* Due to the compressible nature of sponge rubber, minor tolerances in width and thickness are inherent to the material. All figures stated are average values — we recommend verifying suitability for your specific application before use at scale.
Frequently Asked Questions
What widths are available, and how long is each roll?
This strip is available in ten widths: 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 75mm, and 100mm. Every size is supplied as a 10-metre coiled roll at 3mm thick.
Is this strip waterproof and suitable for outdoor use?
Yes. The expanded closed-cell structure prevents water absorption, making it fully waterproof. It also carries an excellent resistance rating to UV light, ozone, and weathering, so it performs reliably in exposed outdoor environments.
How does the self-adhesive backing work?
One face of the strip is factory-coated with a pressure-sensitive adhesive protected by a removable yellow or white release liner. Peel the liner, press the strip firmly onto a clean, dry surface, and the bond is immediate. No additional adhesive is required.
What temperature range can this strip handle?
The material operates reliably between −40°C and +70°C, covering the full range of UK outdoor conditions as well as most vehicle, industrial, and domestic heating environments.
Can this strip be used in vehicles, caravans, or boats?
Yes — it is widely used in automotive, caravan, motorhome, and marine applications for door seals, hatch sealing, vibration damping, and interior cushioning. It is not suitable for areas with direct exposure to fuel or mineral oils.
What is the hardness and how compressible is the strip?
The strip measures 36° Shore 00 — a very soft, highly compressible rating. At 25% deflection it resists at 45 kPa, and at 50% deflection at 100 kPa, with a compression set of no more than 25% after sustained load. This makes it effective for creating reliable compression seals without excessive force.
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