Rubber Gasket Sheet UK: Materials, Grades & Where to Buy — Complete 2026 Guide
Last updated: May 2026 — Expanded with custom cutting options, pressure ratings, temperature range quick-reference, and additional buyer FAQ based on common UK engineer queries.
Rubber Gasket Sheet UK: Which Grade Do You Need?
Rubber gasket sheet is flat rubber material cut to precise dimensions for sealing flanges, pipe joints, access panels, machinery housings and industrial equipment. Unlike pre-formed moulded gaskets, sheet gasket material allows on-site fabrication of custom shapes — essential for maintenance engineers who need to replace worn gaskets quickly without waiting for bespoke moulded parts. The correct grade depends entirely on the medium being sealed — oil, water, steam, chemicals, food — and the operating temperature range. Using the wrong compound is one of the most common and costly mistakes in gasket specification. This guide covers all major grades available from UK suppliers, with selection criteria and standards references.
Common Rubber Gasket Sheet Grades
NBR (Nitrile) Gasket Sheet
NBR nitrile rubber is the most widely used gasket material for oil and fuel applications. It resists petroleum products, hydraulic fluids, mineral oils, diesel, and most aliphatic hydrocarbons. Temperature range: -40°C to +120°C. Suitable for: automotive, engineering, hydraulic systems, compressors, gearboxes. Shore hardness typically 60–70°. Available in standard black industrial grade and blue/white FDA-compliant food-quality grade (FDA 21 CFR 177.2600 and EC 1935/2004). Not suitable for aromatic hydrocarbons (benzene, toluene, xylene), ketones, chlorinated solvents, or prolonged outdoor UV exposure. Browse our nitrile rubber sheet range.
EPDM Gasket Sheet
EPDM (ethylene propylene diene monomer) gasket rubber excels in water, steam, and outdoor weathering applications. Outstanding UV, ozone and weather resistance — its saturated polymer backbone provides inherent UV and ozone resistance that no other common compound matches. Temperature range: -50°C to +150°C. Suitable for: water mains, HVAC systems, roofing, outdoor enclosures, potable water contact, dilute acids, alkalis and ketones. WRAS-approved grades available. Not suitable for petroleum oils, fuels, hydraulic fluids, or aromatic solvents — EPDM swells in petroleum contact.
Neoprene (CR) Gasket Sheet
Neoprene polychloroprene offers balanced performance across oil, weather and moderate chemical resistance. Temperature range: -35°C to +120°C. Suitable for: marine applications, refrigerants, mild acids, building services, window and door gaskets, transformer oil, fire-rated applications. Good fire resistance — inherently self-extinguishing in most formulations, making it important for rail, marine and tunnel applications.
Silicone Gasket Sheet
Silicone rubber provides exceptional high-temperature sealing. Temperature range: -60°C to +230°C (HT grades to +300°C). FDA-compliant grades available for food contact. Suitable for: ovens, food processing equipment, aerospace, pharmaceutical, medical devices where physiological inertness is required. Not suitable for petroleum or strong acids. Note that silicone is typically 4–8× the price of SBR per m²; for pure outdoor weathering without extreme temperatures, EPDM is more cost-effective.
SBR Gasket Sheet
SBR (styrene-butadiene) is a cost-effective general-purpose gasket material for low-pressure water and non-aggressive media. Temperature range: -30°C to +80°C. Available in Shore A 40–70 hardness for different compression requirements. Not suitable for oils. Widely used for: water systems, low-pressure flanges, vibration damping, general engineering.
Natural Rubber Gasket Sheet
Natural rubber offers excellent elasticity and tear resistance for moderate-pressure applications. Temperature range: -50°C to +80°C. Suitable for: water, dilute acids and alkalis, abrasion-resistant sealing. Not suitable for petroleum products.
Insertion Rubber Gasket Sheet
Insertion rubber sheet incorporates one or more fabric plies (cotton, nylon or polyester) within the rubber matrix. The fabric reinforcement radically improves dimensional stability under bolt loads, preventing the creep and extrusion that can occur with unreinforced rubber in sustained high-pressure flanged applications. Best for PN10–PN25 flanged pipe joints, pump housing gaskets, and high-bolt-load compression applications. Available compounds: SBR insertion (most common), EPDM insertion for steam service, nitrile insertion for oil service. Standard insertion thicknesses: 1.5mm, 3mm and 6mm.
Temperature Range Quick Reference
| Rubber Grade | Min. Temp | Max. Temp | Steam Rated? |
|---|---|---|---|
| NBR (Nitrile) | -40°C | +120°C | No |
| EPDM | -50°C | +150°C | Yes (up to 120°C) |
| Neoprene (CR) | -35°C | +120°C | Limited |
| Silicone | -60°C | +230°C | Yes |
| SBR | -30°C | +80°C | No |
| Natural Rubber | -50°C | +80°C | No |
How to Select the Right Rubber Gasket Material
| Medium Sealed | Recommended Grade |
|---|---|
| Petroleum oils, diesel, hydraulic fluid | NBR (Nitrile) |
| Water, steam, HVAC | EPDM |
| High temperature (+150°C+) | Silicone |
| Food and pharmaceutical contact | Silicone (FDA) or EPDM (WRAS) |
| Marine, refrigerants, weather | Neoprene (CR) |
| Low-cost general sealing | SBR or Natural |
| High bolt-load flanges (PN10–PN25) | Insertion rubber (SBR, EPDM or NBR) |
Rubber Gasket Sheet Thicknesses Available in the UK
Standard gasket rubber sheet thicknesses stocked in the UK include:
- 0.5–1.5mm — precision seals, valve seats, diaphragms, electrical enclosures, panel seals (smooth mating surfaces required)
- 3mm — most common general-purpose gasket thickness for PN6–PN10 pipework in good flange condition
- 4.5mm — medium-pressure flanges, pipework
- 6mm — heavy flanges, high-vibration applications, worn or irregular flange faces requiring more compression to seal
- 9mm, 12mm, 25mm — specialist heavy industry and marine
Most rubber gasket sheet is available in standard roll widths of 1.0m, 1.2m and 1.4m, with custom widths available to order. Cut-to-size service available for specific gasket profiles — cut to any width and length with no minimum order. Our rubber sheet and rubber sheeting rolls are stocked for immediate UK dispatch.
Rubber Sheet Hardness for Gasket Applications
Shore A hardness affects a gasket's ability to seal irregular surfaces. Softer rubber (40–50 Shore A) deforms more readily to fill surface imperfections — better for worn or uneven flange faces. Harder rubber (60–75 Shore A) provides greater dimensional stability and resistance to extrusion under high bolt loads.
| Shore A | Characteristics | Best Application |
|---|---|---|
| 40–50 | Very soft, highly compressible | Worn flange faces, low-pressure seals, vibration isolation |
| 55–65 | Standard gasket hardness | General flanged joints PN6–PN16 — the most stocked grade |
| 70–80 | Firm, good extrusion resistance | High bolt-load flanges, high-pressure systems, wear-resistant packing |
| Insertion | 60–70 Shore A + fabric | Best extrusion resistance for sustained high bolt loads |
Rubber Gasket Sheet Standards & Certifications
- BS 1562 — Joint rings for use with asbestos-free jointing sheet (now refers to BS EN standards)
- BS 2751 — Rubber sheet for general mechanical purposes — specifies SBR grades, physical properties (tensile, elongation, hardness, compression set)
- BS 2752 — Neoprene (chloroprene) rubber sheet — specifies CR grades and properties
- WRAS approval — Required for EPDM used in contact with potable water (Water Regulations Advisory Scheme)
- FDA 21 CFR 177.2600 — Required for food-contact silicone and rubber
- EC 1935/2004 — EU Regulation on materials in contact with food — applicable to rubber gaskets in food processing equipment
- BS EN 681-1 — Elastomeric seals for water and drainage pipework — for EPDM and SBR gaskets in pressurised water systems
- BS EN 682 — Elastomeric seals for gas supply joints
- ISO 3302 — Rubber tolerances and dimensional limits
Cutting Rubber Gasket Sheet
Rubber gasket sheet can be cut using:
- Utility knife / Stanley knife — Suitable for SBR, EPDM, neoprene up to 6mm. Mark the cut line with a ballpoint pen or chalk; make multiple passes rather than a single stroke to reduce blade deflection and improve edge quality. Keep the blade perpendicular for a square edge.
- Hollow punches — For bolt holes in standard metric sizes (6mm to 50mm diameter). Strike with a mallet on a self-healing cutting mat or end-grain wood block. An arbor press provides cleaner, more consistent holes than hand striking.
- Scissors / shears — Sharp heavy-duty scissors cut clean edges in rubber sheet below 3mm thickness. Quickest method for trimming to approximate size before more precise punch operations.
- Jigsaw or bandsaw — For rubber sheet 8mm+ or complex curved profiles. Use a fine-tooth metal-cutting blade and clamp the rubber firmly. Cutting oil or soapy water as lubricant reduces blade heat and improves cut quality.
- Die cutting / punch press — Precise repeatable gaskets in production volumes
- Waterjet cutting — Complex profiles in any thickness without heat distortion
- Laser cutting — Fine-detail silicone and neoprene gaskets
For DIY cutting, see our full rubber cutting guide for blade selection, technique, and safety tips.
Pressure Ratings: What Can Rubber Gaskets Seal?
| Application | Typical Pressure | Recommended Grade | Min. Thickness |
|---|---|---|---|
| Domestic plumbing | Up to 10 bar | EPDM or SBR | 3mm |
| Industrial pipework | 10–40 bar | NBR or EPDM | 4.5–6mm |
| Hydraulic systems | Up to 350 bar | NBR (specialist grade) | O-ring preferred |
| Low-pressure seals | Up to 5 bar | Any compatible grade | 1.5–3mm |
Common Gasket Specification Mistakes to Avoid
1. Using SBR in oil service — SBR swells in petroleum products. If there is any oil, fuel, grease, or hydraulic fluid present, the correct compound is nitrile (NBR). This is the single most common and costly gasket specification error in UK engineering maintenance.
2. Using EPDM in oil service — EPDM has similar oil resistance to SBR (poor). EPDM is excellent for steam, water, and outdoor service — it is not an oil-service compound.
3. Using standard rubber in food contact — Standard SBR is not food-grade. For any application where rubber is in direct or indirect contact with food, specify FDA 21 CFR 177.2600 or EC 1935/2004 compliant grade — typically food-grade nitrile or silicone in blue or white colour.
4. Under-specifying thickness for worn flanges — 1.5mm rubber sheet on a worn or corroded flange face will not seal reliably. Assess the flange condition before ordering — worn faces need 3–6mm to fill surface irregularity. Insertion rubber provides additional stability.
5. Ignoring temperature limits — SBR standard grade is limited to +80°C continuous. Steam service gaskets must specify EPDM (to +150°C) or silicone (to +200°C). Never specify SBR for steam service.
Frequently Asked Questions
What is the best rubber for gaskets?
There is no single best rubber — the correct choice depends on the medium sealed. For oil and fuel, use NBR nitrile. For water and steam, use EPDM. For high temperature, use silicone. For food contact, use FDA-approved silicone or WRAS-approved EPDM. Neoprene works well for general-purpose and marine applications.
Can I cut rubber sheet into gaskets myself?
Yes — rubber gasket sheet is easy to cut with a sharp utility knife or scissors for simple shapes. Use a metal ruler or straight edge and a cutting board. For precise or complex profiles, we can supply sheet pre-cut to size or in standard gasket dimensions.
How thick should a rubber gasket be?
3mm is the most common gasket thickness for general industrial flanges. Thinner 1.5mm suits panel and enclosure seals. Heavier 6mm+ suits high-pressure pipe flanges and vibration-isolating joints. Always check the flange recess depth if fitting into a groove.
What is insertion rubber sheet?
Insertion rubber sheet is rubber sheeting reinforced internally with a fabric layer (cotton, nylon or polyester). The fabric reinforcement provides dimensional stability under compression — preventing the rubber from extruding laterally when subjected to sustained bolt loads on flanged joints. It is the preferred specification for flanged pipe gaskets in industrial applications.
Is NBR or EPDM better for water systems?
EPDM is better for water and steam systems. NBR is not resistant to hot water over 70°C and degrades in prolonged water contact. EPDM is the correct choice for plumbing, heating systems, and potable water applications. For potable (drinking) water, specify WRAS-approved EPDM.
Where can I buy rubber gasket sheet in the UK?
Rubberco stocks rubber gasket sheet in NBR, EPDM, neoprene, silicone, SBR and insertion grades, available cut to size with free UK delivery. Rolls and part rolls stocked for immediate despatch from our UK warehouse.
What is the difference between SBR and NBR rubber sheet?
SBR (styrene-butadiene rubber) is a general-purpose compound suitable for water, weak acids, and non-oil environments. NBR (nitrile) is an oil-resistant compound specifically formulated for contact with petroleum, hydraulic oils, and fuels. SBR is significantly cheaper; NBR is essential where oil contact is present. Never substitute SBR for NBR in oil-contact applications — it will swell and fail.
Does silicone rubber sheet work for outdoor gaskets?
Silicone rubber has excellent UV and ozone resistance and works well outdoors. However, for pure outdoor weathering applications without extreme temperatures, EPDM is typically more cost-effective and provides comparable performance. Silicone is the premium choice where both high temperature and outdoor exposure are combined.
Can rubber gaskets be used in gas supply systems?
Rubber gaskets for gas supply joints in the UK must conform to BS EN 682. Not all rubber compounds are approved — neoprene is the most commonly specified grade for natural gas and LPG. Always confirm the gasket material meets the relevant British Standard and is rated for the gas being sealed before installation.
Shop Rubber Sheet at Rubberco
Find the right rubber sheet grade for your gasket application:
- Rubber Sheet UK — SBR, EPDM, Nitrile, Neoprene and Silicone in stock
- Rubber Sheeting Rolls — Full 10m rolls for production volume gasket cutting
- Industrial Rubber Products — Heavy-duty materials for engineering and manufacturing
Need a specific grade or thickness not listed? Contact our technical team — we can source specialist gasket compounds to your specification.
📚 Further Reading: EPDM Rubber Sheet UK: Properties & Applications | Neoprene Rubber Sheet UK | Rubber Sheeting Compound Guide
See our SBR Rubber Sheet 1-Ply Fabric Insert – Heavy-Duty Industrial →
