Silicone Sponge Sheet – 1m Wide | Closed Cell | Medium, Medium-Firm & Firm Density | -60°C to +230°C | 1.5–30mm

HOW IT IS SOLD

• Each unit is a 1m wide x 1m long sheet.
• Order more than one and lengths are supplied as a continuous roll (up to 10m) – tell us at checkout if you need separate pieces.
• Self-adhesive versions have a pressure-sensitive adhesive on one face with a peel-off liner.
• Cut gaskets, strip and die-cut parts are available – ask for a quote.

WHICH DENSITY?

• Medium (250 kg/m³): the softest grade here – low closing force, ideal for enclosure doors, lids, light covers and cushioning delicate parts.
• Medium-firm (400 kg/m³): more body and better sealing pressure for oven doors, hatches and high-temperature gaskets. Choose Medium-Firm Self-Adhesive for a peel-and-stick backing.
• Firm (550 kg/m³): the firmest sponge – holds a seal under higher loads and resists over-compression while still conforming far better than solid rubber.

WHICH THICKNESS?

• 1.5–3mm: thin flat gaskets, panel and lid seals on reasonably flat faces.
• 4–8mm: uneven or cast faces, enclosure doors and anti-vibration pads.
• 10–30mm: large gaps, heavy cushioning, press pads and acoustic or thermal packing.
• As a rule of thumb, choose a thickness that compresses by 25–50% when closed.

TYPICAL APPLICATIONS

• Oven, dryer and hot-cabinet door seals
• Electrical enclosure, lighting and control panel gaskets
• Aerospace and rail interior seals and cushioning
• Heat-press and laminating backing pads
• Anti-vibration and shock-absorbing pads
• Thermal insulation and gap filling

TECHNICAL SPECIFICATION

FREQUENTLY ASKED QUESTIONS

Why are some colours or thicknesses only shown in one density?
Each density is made in its own stock colours and thicknesses. The pickers only show what we can supply – ask if you need another combination.

Sponge or solid silicone?
Choose sponge when faces are uneven, closing force must be low or you need cushioning. Choose solid sheet for high pressure, thin precise gaskets or abrasion.

Does it absorb water?
The cells are predominantly closed, so it resists water and dust ingress. Cut edges expose some cells, which is normal.

How do I cut it?
A sharp knife or rotary cutter with a straight edge works well; thicker sheets cut best in several light passes.

NOT SURE WHAT YOU NEED?

Call +44 1282 277786 or email sales@industrial-polymers.co.uk with your application, temperature, gap size and closing force and we will recommend the right density and thickness.