4mm EPDM Foam Tape | Self-Adhesive Sponge Seal & Gasket Tape | Flashback® Tape

Typical Uses: Door and window sealing, weatherstripping, gasketing, gap filling, access panels, enclosures, machinery cushioning, anti-rattle protection, sound dampening and vibration reduction.

Suitable Surfaces: Metal, painted metal, plastic, UPVC, glass, wood, painted surfaces, panels and frames. For best adhesion, surfaces should be clean, dry and smooth. Always test first where suitability is uncertain.

Not suitable for: Oils, fuels, solvents or aggressive chemicals; electrical insulation, conductive applications or live circuits; submerged conditions; structural fixing or safety-critical applications.

Material: Closed-cell EPDM sponge rubber

Thickness: 4mm

Widths from stock: 10mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 75mm and 100mm

Wider widths: Up to 930mm to order. Contact sales@flashbacktape.co.uk for lead times and pricing

Roll Length: 10m

Adhesive: Single-sided acrylic pressure-sensitive adhesive

Colour: Black

Temperature Range: -20°C to +80°C

Product Code: FB-EPDM

1. Ensure the surface is clean, dry and free from dust, grease and loose material.
2. Measure and cut the tape to the required length using scissors or a sharp knife.
3. Remove the release liner and carefully position the tape before pressing down.
4. Apply firm, even pressure along the full length.
5. Allow the adhesive time to bond before placing the tape under compression or stress.

Always test first to confirm suitability for your surface and application. Adhesion varies with surface condition, temperature and environment, so take particular care on dusty, damp, rough, porous, delicate, freshly painted, coated or high-value surfaces.

Material: Closed-cell EPDM sponge rubber

Classification: ASTM D1056 2A1 B3

Density: 70 to 100 kg/m³

Flammability: FMVSS 302 pass

Temperature Range: -20°C to +80°C

Sponge rubber performance (typical values from the EPDM data sheet)

Compression deflection: 20 to 40 kPa at 25%, 50 to 70 kPa at 50% (ASTM D1056)

Compression set: 13 to 18% at 25%, 30 to 45% at 50%, 22 hours at 23°C (ASTM D1056)

Tensile strength: 300 to 350 kPa (ASTM D412)

Elongation: 150 to 180% (ASTM D412)

Water absorption: 1 to 3% (ASTM D1056)

Water, air and dust seal: Excellent

Ozone and weathering resistance: Excellent

Adhesive

Type: Modified acrylic, pressure sensitive

Peel adhesion: Min 21 N/25mm (AFERA 5001)

Temperature resistance: -40°C to +90°C

Data Sheet: Download the EPDM Data Sheet (PDF)

All figures are typical values, not a guaranteed specification. The working range of the finished tape is -20°C to +80°C, set by the sponge rubber. This tape is not certified for electrical, structural, chemically exposed, submerged, automotive safety-critical or load-bearing applications. Suitability depends on surface, compression, temperature, environment and installation. Always test before full use. Flashback Tape accepts no liability for misuse or improper installation.

Is 4mm thick enough for my gap?

4mm suits small to medium gaps and gives a little more compression and cushioning than 3mm. For medium or uneven gaps, 5mm or 6mm will compress into the gap more reliably.

What is EPDM foam tape used for?

Sealing, gasketing, cushioning, weatherstripping, gap filling, anti-rattle protection and vibration dampening.

Is EPDM foam tape suitable for outdoor use?

EPDM's ozone and weathering resistance is rated excellent on our data sheet, and the tape is rated for use from -20°C to +80°C, making it suitable for many outdoor and sheltered applications. Always confirm suitability for your specific application.

Is EPDM foam tape waterproof?

Closed-cell EPDM helps resist water ingress, but the finished seal depends on compression, surface contact and installation. It should not be used as a roofing seam, flashing tape, waterproof membrane joint, or in submerged conditions.

Is EPDM the same as neoprene?

No. Both are synthetic rubbers used for sponge sealing tapes, but they suit different conditions. EPDM is generally the better choice for outdoor and weather-exposed sealing, while neoprene is often preferred where oils or fuels are present. EPDM is not suitable for contact with oils, fuels or solvents. Our EPDM vs neoprene vs foam tape guide compares them in detail.

Can EPDM foam tape be cut to size?

Yes. It cuts easily to length with scissors or a sharp knife.