EPDM Sponge Rubber Sheet UK — Closed Cell, Weatherproof | Sold by the Metre

This commercial-grade EPDM sponge rubber sheet is a closed-cell foam rubber with exceptional weather, UV, and ozone resistance. Unlike open-cell foams, the closed cell structure prevents water absorption, making it ideal for outdoor sealing, weatherproofing, and vibration isolation in exposed environments. Sold by the linear metre, cut from standard-width rolls.

Technical Specifications

Property	Value
Material	EPDM (Ethylene Propylene Diene Monomer) sponge
Cell structure	Closed cell (non-absorbent)
Temperature range	-40°C to +120°C
Water resistance	Excellent — closed cell prevents absorption
UV/ozone resistance	Excellent — EPDM is inherently UV stable
Weathering resistance	Outstanding — suitable for permanent outdoor use
Compression set	Low — recovers well after prolonged compression
Colour	Black

EPDM Sponge vs Solid EPDM — Key Differences

EPDM sponge sheet is a foam rubber — compressible and conformable — as opposed to solid EPDM sheet which is dense and rigid. Choose sponge for:

• Gap-filling and sealing applications (the foam conforms to irregular surfaces)
• Vibration and acoustic isolation where energy absorption is needed
• Lightweight cushioning and padding
• Weather strips and door/window seals

Choose solid EPDM sheet for gaskets, pond liners, and structural membranes where dimensional stability is critical.

Applications

• Rooflights and skylight sealing — compression seals around frames
• Vehicle body sealing — caravan, motorhome, and commercial vehicle door seals
• HVAC ductwork — vibration isolation pads under air handling units
• Marine applications — hatch seals, deck fitting gaskets, porthole seals
• Construction expansion joints — compressible filler for movement joints
• Greenhouse glazing — weatherproof perimeter seals

Why Choose Rubberco EPDM Sponge Sheet?

• ✅ Genuine closed-cell EPDM — not open-cell sponge or polyurethane foam
• ✅ Rated for -40°C to +120°C — suitable for rooftop and engine bay applications
• ✅ Cut to any length from 100mm — sold by the linear metre
• ✅ Free UK delivery on all orders

Frequently Asked Questions

Is EPDM sponge the same as neoprene sponge?

No. EPDM sponge has superior weather, UV, and ozone resistance compared to neoprene (CR) sponge. For outdoor and roofing applications, EPDM is the preferred choice. Neoprene sponge offers better oil and fuel resistance, making it more suitable for engine bay sealing.

Can EPDM sponge be used as a pond liner?

EPDM sponge sheet should not be used as a pond liner — use solid EPDM sheet instead. Sponge rubber, even closed cell, can absorb water under prolonged hydrostatic pressure. For pond liners, specify 1mm or 1.5mm solid EPDM sheet.

How do you cut EPDM sponge rubber?

EPDM sponge cuts easily with scissors or a sharp utility knife. For straight cuts in thicker sheets (6mm+), score and snap. Use a fine-tooth bandsaw for precision cutting of multiple strips.