Neoprene Rubber Superior Sealing Cork Rubber Sheet
Model:KXT N620
Neoprene cork rubber sheet combining cork compressibility with neoprene oil and heat resistance. Hardness Shore A 55–85, service temperature −40 °C to +120 °C (peak +150 °C), thickness 1–6 mm, sheet size 1 m × 1 m or 1 m × 2 m. Used for transformer sealing, automotive gaskets, expansion joints and vibration isolation. Die-cut to drawing. Material certificate supplied. Factory-direct price, 7–15 day lead time.
Neoprene Rubber Superior Sealing Cork Rubber Sheet — Cork & Neoprene Composite Gasket Sheet for Transformer, Automotive & Expansion Joint Sealing
Neoprene Rubber Superior Sealing Cork Rubber Sheet — a cork and neoprene composite that combines the compressibility of cork with the oil resistance and flexibility of neoprene rubber.
Neoprene Rubber Superior Sealing Cork Rubber Sheet is a composite gasket material made by bonding granulated cork with neoprene rubber. The result is a sheet that combines the compressibility and recovery of cork with the chemical resistance, heat resistance and flexibility of neoprene. It is highly oil resistant and is widely specified for transformer sealing, automotive gaskets, expansion joints and vibration isolation, delivering a reliable seal under repeated compression cycles.
- Material: granulated cork bonded with neoprene rubber
- Hardness grades: medium (Shore A 55–70) and hard (Shore A 70–85)
- Service temperature: −40 °C to +120 °C (peak +150 °C)
- Key properties: highly oil resistant, excellent compressibility and recovery, durable, superior tensile and tear strength
- Standard thickness: 1 mm – 6 mm; sheet size 1 m × 1 m or 1 m × 2 m; custom cut to drawing
- Documentation: material certificate and dimensional inspection report supplied with each batch
What Is Neoprene Cork Rubber Sheet?
Neoprene cork rubber sheet is a composite gasket material produced by mixing granulated cork with neoprene (polychloroprene) rubber and bonding the mixture under heat and pressure into a flat sheet. The cork content provides excellent compressibility, recovery and vibration damping, while the neoprene matrix contributes oil resistance, heat resistance, weather resistance and mechanical strength.
The result is a material that behaves better than either component alone. Pure cork is compressible but brittle and not oil resistant; pure neoprene is flexible and oil resistant but has limited compressibility. The cork-neoprene composite balances both, which is why it is a preferred gasket material for transformer sealing, automotive engine and transmission gaskets, expansion joint fillers, and vibration isolation pads. It is also easy to cut, punch and die-cut into finished gaskets with tight dimensional accuracy.
Main Specification
| Property | Medium Grade | Hard Grade |
|---|---|---|
| Hardness (Shore A) | 55–70 | 70–85 |
| Density (g/cm³) | ≤0.9 | ≤1.05 |
| Tensile strength (kg/cm²) | ≥15 | ≥15 |
| Compressibility at 300 psi (%) | 15–30 | 15–30 |
| Internal pressure (max) | 3.5 kgf/cm² | 3.5 kgf/cm² |
| Service temperature | −40 °C to +120 °C (peak +150 °C) | |
Values are typical for standard production. Custom hardness, density and thickness available on request.
Key Advantages
- Combines the compressibility and recovery of cork with the flexibility and shelf life of rubber
- Highly oil resistant — ideal for transformer and automotive sealing
- Durable with superior tensile and tear strength
- Excellent vibration damping and acoustic insulation
- Withstands repeated compression cycles without losing sealing force
- Easy to cut, punch and die-cut into finished gaskets
- Weather resistant and dimensionally stable in service
Typical Applications
- Transformer sealing gaskets and oil-filled electrical equipment
- Automotive gaskets — engine, transmission, fuel and oil systems
- Expansion joints and building spacers
- Gaskets and seals for general industrial equipment
- Vibration isolation pads and machine mounting
- Gas industry reinforcing seals
- Anti-vibration and anti-slip pads for HVAC and machinery
Why Buy Neoprene Cork Rubber Sheet from Kaxite Sealing
We compound and calender the sheet in-house
Ningbo Kaxite Sealing Materials Co., Ltd. operates its own compounding, calendering and vulcanising facility in Ningbo, China. We control the cork granule size, neoprene grade, mixing ratio and curing cycle, so we can guarantee hardness, density and oil resistance — and quote a genuine factory price.
Quality control on every batch
- Incoming cork granules and neoprene rubber verified for purity
- Mixing ratio and curing parameters recorded for each batch
- Hardness, density and tensile strength tested on every batch
- Thickness and width inspected on 100% of finished sheets
- Material certificate and dimensional report supplied with each shipment
- Third-party inspection (SGS, BV, TUV) arranged on request
Custom thickness and die-cut gaskets
- Standard thickness from 1 mm to 6 mm; custom thickness on request
- Sheet size 1 m × 1 m or 1 m × 2 m; custom width available
- Die-cut gaskets, rings, washers and strips produced to drawing
- Self-adhesive backing available on request
Terms that suit project procurement
- No minimum order quantity on standard sizes — sample and trial orders welcome
- Stock sizes ship in 7–15 days; custom mixing and die-cutting in 15–25 days
- Export packing with protective wrapping and carton or pallet
- 24 hours × 7 days after-sales response
What to Send for an Accurate Neoprene Cork Rubber Sheet Quotation
| Information | Example | Why We Need It |
|---|---|---|
| Thickness | 3 mm | Determines calender setup and price |
| Sheet size | 1 m × 1 m | Cutting and packing requirements |
| Hardness grade | Medium (55–70 Shore A) | Confirms compound and density |
| Quantity | 100 sheets | Sets production scheduling |
| Application | Transformer sealing, automotive gasket | Confirms material and surface finish |
| Die-cut drawing (if applicable) | PDF or DXF | Confirms tooling and finished part price |
Get Your Neoprene Cork Rubber Sheet Quotation
Send your required thickness, sheet size, hardness grade and quantity. Our technical sales team will reply within 2 business hours with a factory price and available stock sizes.
Frequently Asked Questions
What is the difference between neoprene cork rubber sheet and plain cork sheet?
Plain cork sheet is made from compressed cork granules and is compressible and lightweight, but it is not oil resistant and can be brittle. Neoprene cork rubber sheet bonds the cork granules with neoprene rubber, adding oil resistance, heat resistance, weather resistance and mechanical strength. It is the preferred choice for transformer sealing, automotive gaskets and any application where oil or fuel contact occurs.
What is the temperature range of neoprene cork rubber sheet?
The standard material operates from −40 °C to +120 °C continuously, with short-term excursions up to +150 °C. Confirm the exact limit against your process conditions with our technical team.
What thicknesses and sheet sizes are available?
Standard thickness ranges from 1 mm to 6 mm, and sheet size is typically 1 m × 1 m or 1 m × 2 m. Custom thickness and width are available on request. We also die-cut finished gaskets, rings, washers and strips to your drawing.
Is neoprene cork rubber sheet suitable for transformer oil sealing?
Yes. This is one of the most common applications. The neoprene component provides excellent resistance to transformer oil, while the cork component provides the compressibility needed to seal against the uneven surfaces of transformer tanks and covers. The material is dimensionally stable and retains sealing force over the service life of the transformer.
What are your MOQ, lead time and payment terms?
There is no minimum order quantity on standard sizes — sample and trial orders are welcome. Stock sizes ship in 7–15 days; custom mixing and die-cutting take 15–25 days. Standard payment terms are 30% T/T deposit with the balance against copy of B/L, or L/C at sight for larger orders.
Do you supply material certificates?
Yes. Every batch is supplied with a material certificate covering hardness, density, tensile strength, compressibility and temperature range, plus a dimensional inspection report. Third-party inspection can be arranged on request.
Send Inquiry
Contact Info
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Address
No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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