Last updated: May 2026 — Prices, market data and FAQs reviewed and updated.

Silicone Rubber Sheet UK: Properties, Grades, Applications & Buyer's Guide 2026

Silicone rubber sheet is one of the most versatile industrial materials available in the UK. Unlike natural rubber, EPDM, or SBR, silicone (polydimethylsiloxane-based elastomer) maintains its mechanical properties across an extraordinary temperature range — from -60°C to +230°C — while offering FDA food-grade compliance, outstanding UV and ozone resistance, and exceptional long-term compression set resistance.

This guide covers everything UK buyers need to know when specifying silicone rubber sheet: grades, hardness, applications, dimensional standards, and how to choose between silicone and alternative rubber compounds.

What Is Silicone Rubber?

Silicone rubber is a synthetic elastomer based on a silicon-oxygen (Si-O) polymer backbone — fundamentally different from carbon-chain elastomers like natural rubber or SBR. This inorganic backbone gives silicone its defining properties:

• Extraordinary temperature stability: The Si-O bond is far more thermally stable than C-C bonds in organic rubbers
• Biologically inert: Non-toxic, odourless, tasteless — FDA and EU food contact regulations permit silicone in direct food contact applications
• UV and ozone stability: The Si-O backbone does not oxidise or degrade under UV or ozone exposure — silicone remains flexible and intact outdoors indefinitely
• Low compression set: Maintains sealing force over long periods — critical for gasket applications

Silicone Rubber Sheet Grades

General Purpose Silicone (VMQ)

The standard UK silicone specification. Available in 40–70° Shore A hardness. Used for seals, gaskets, food processing liners, and general high-temperature or food-contact applications. FDA compliant as standard.

High-Temperature Silicone

Specialised silicone compounds rated for continuous service to +250°C or short-term peaks to +300°C. Used in oven seals, bakery conveyor systems, and automotive exhaust adjacent sealing.

Food Grade / FDA Silicone

Certified to FDA 21 CFR 177.2600 and EU 10/2011 (food contact materials regulation). Required for direct food contact in bakeries, dairy plants, beverage production, and pharmaceutical manufacturing. Often coloured blue or red for HACCP traceability.

Translucent / Medical Grade Silicone

Translucent or clear silicone sheet for applications requiring visual inspection. Medical-grade silicone meets USP Class VI and ISO 10993 biocompatibility standards — used in medical devices, pharmaceutical equipment, and laboratory applications.

Sponge Silicone Sheet

Open or closed-cell silicone foam sheet for gasket and sealing applications requiring compression under low closing force — door seals, oven gaskets, access panel sealing, EMI shielding.

Shore Hardness Guide for Silicone Rubber Sheet

Temperature Performance: Silicone vs Other Rubber Compounds

Where Silicone Rubber Sheet Is Used in the UK

Food and Beverage Industry

The UK food industry is the largest single market for silicone rubber sheet. Applications include:

• Oven door seals and conveyor belt gaskets in bakeries
• Dairy processing — pipeline seals, valve gaskets, hygienic joint sealing
• Beverage filling lines — FDA-compliant seals for direct product contact
• Commercial kitchen equipment — autoclave seals, steam oven gaskets

Automotive and Aerospace

• Engine bay gaskets and seals adjacent to exhaust systems
• Turbocharger hose sealing pads
• Aircraft cabin seals, window seals, and door seals

Pharmaceutical and Medical

• Autoclave-resistant seals for sterilisation equipment
• Pharmaceutical process vessel gaskets (FDA-compliant)
• Medical device component sealing

Industrial Sealing

• High-temperature pipe flanges and pressure vessel gaskets
• Furnace and kiln door sealing
• HVAC duct sealing
• Electrical enclosure gaskets in outdoor environments

Silicone Rubber Sheet: Buying Guide

Standard Sheet Sizes Available in the UK

• 1.2m × 1m (most common cut sheet)
• 1.2m wide continuous rolls — per linear metre
• Custom cut sizes available from Rubberco

Standard Thicknesses

0.5mm, 1mm, 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm

Colours Available

Red (standard), translucent, blue (food industry), black, white. Custom colours available on request for volume orders.

Cutting Silicone Rubber Sheet

Silicone rubber can be cut with:

• Steel rule and sharp knife: For straight cuts on thin sheet (up to 6mm)
• Scissors: For thin sheet under 3mm
• Laser cutting: Best precision for complex gasket shapes — creates clean, sealed edges
• Water jet cutting: Excellent for thick sections (10mm+) and complex geometries
• Die cutting: For volume production of standard gasket shapes

Silicone rubber does not tear cleanly with dull tools — always use sharp blades and replace frequently.

Frequently Asked Questions

Is silicone rubber sheet FDA food safe?

General purpose and food-grade silicone rubber sheet from Rubberco is FDA 21 CFR 177.2600 compliant and suitable for indirect food contact applications. For direct food contact, confirm the specific grade's certification.

What is the difference between silicone sheet and EPDM sheet?

EPDM is better for outdoor weathering and water immersion at lower temperatures (up to +120°C). Silicone handles much higher temperatures (-60°C to +230°C), is FDA food-grade, and maintains lower compression set over time. Silicone costs more than EPDM but is irreplaceable in high-temperature or food-contact applications.

Can silicone rubber sheet be used outdoors?

Yes — silicone is UV, ozone, and weather resistant. It will not harden, crack, or degrade in outdoor exposure — outperforming natural rubber, EPDM, and neoprene in UV-exposed applications.

How do I bond silicone rubber sheet?

Silicone's low surface energy makes it difficult to bond with conventional adhesives. Use dedicated silicone adhesive/sealant, or specialised silicone primer followed by cyanoacrylate. For gaskets, mechanical compression sealing is preferred over bonding wherever possible.

What is the lifespan of silicone rubber sheet?

In clean industrial applications within rated temperature range, quality silicone rubber sheet typically lasts 10–20 years. In food processing autoclaves or demanding cyclic thermal applications, 5–10 years is more typical. Regular inspection of sealing surfaces is recommended.

Silicone Rubber Sheet UK: 2026 Supply Guide & Lead Times

UK supply of silicone rubber sheet has normalised significantly in 2026 following the supply chain disruptions of 2021-2023. Key procurement points for buyers:

• Standard grades (50° Shore A, 1-10mm) — available ex-UK stock for immediate despatch. Rubberco holds comprehensive stock of the most common thicknesses.
• Specialist grades (food-grade blue, medical translucent, high-temp) — typically 3-7 working days from specialist stock
• Thick silicone (20mm+) — allow 5-10 working days for cut-from-bulk fulfilment
• Custom die-cut or water-jet cut pieces — contact our team for a quote; typical turnaround 5-7 working days for standard profiles

For procurement managers: contact our trade team for standing order arrangements on regular silicone sheet requirements. Volume pricing is available from 10m per specification.

Silicone Rubber Sheet vs EPDM: Which to Specify?

Additional Frequently Asked Questions: Silicone Rubber Sheet

Is silicone rubber sheet resistant to steam?

Yes — silicone is one of very few elastomers with genuine steam and autoclave resistance. Food-grade silicone sheet is regularly used in autoclaves cycling to 134°C at 3 bar. Standard general-purpose silicone handles steam to approximately 120°C continuously; high-temperature silicone grades handle 150°C steam. For pharmaceutical autoclaving (134°C/3 bar cycles), specify USP Class VI medical-grade silicone.

Can silicone rubber sheet be used as a gasket under bolted flanges?

Yes — silicone's excellent compression set resistance makes it well-suited to bolted flange gasket applications, particularly at elevated temperatures where other rubbers would take permanent set and lose sealing force over time. Standard 50° Shore A silicone is suitable for most flange gasket applications. For high-pressure systems, use 60-70° Shore A. Always cut gaskets with sharp tools — blade dragging causes micro-tears at the sealing face.

What is the shelf life of silicone rubber sheet?

Silicone rubber sheet has an excellent shelf life — typically 5-10 years when stored correctly (cool, dry, dark, away from ozone sources). Unlike natural rubber or SBR which harden and crack with age, silicone remains stable almost indefinitely in proper storage conditions. Check stored silicone for surface tackiness (indicates degradation) or hardening before use in critical sealing applications.

Does silicone rubber resist chemicals?

Silicone has moderate chemical resistance. It is excellent for: steam, hot air, dilute acids, and food oils. It is poor for: concentrated acids, alkalis, aromatic hydrocarbons (toluene, benzene), and most organic solvents. For chemical resistance beyond food and pharmaceutical applications, specify the exact chemical environment to our technical team — we can recommend the appropriate silicone grade or alternative compound.

Is there a white or coloured silicone rubber sheet available?

Yes — silicone rubber sheet is available in red (standard), translucent/clear, blue (food industry HACCP traceability), white, and black. Custom colours are available for large volume orders (typically 50m+). Blue and translucent grades are stocked for immediate despatch; white is available to order.

Related guides: EPDM Rubber Sheet UK Guide | Neoprene Rubber Sheet Guide | Nitrile Rubber Sheet Guide

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