Bonded Seal Washer: Complete Guide to Combination Gaskets
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Bonded seal washers, also known as combination gaskets, are metal-rubber integrated static sealing components widely used in hydraulic systems, mechanical equipment, pipeline joints and automotive oil circuits. The metal frame and rubber layer are vulcanized together as one piece, delivering good pressure resistance, stable compression and reliable leak-proof performance.
We supply four main types of bonded combination washers:
NBR Carbon Steel Bonded Washer, FKM Brass Bonded Washer, NBR Fully Wrapped Carbon Steel Bonded Washer, FKM Fully Wrapped Carbon Steel Bonded Washer, to fit various temperature, pressure and chemical working environments.
1. NBR Carbon Steel Bonded Washer
NBR (Nitrile Butadiene Rubber) + carbon steel combination gasket, the most common economical sealing solution for general industrial use.
Features
• Excellent oil resistance and wear resistance
• Good elasticity under normal working temperature
• Firm bonding between NBR rubber and carbon steel ring
• Anti-compression deformation under medium pressure
Performance
Temperature range: -30°C ~ 120°C
Suitable for hydraulic oil, lubricating oil, fuel and water sealing
Applications
Hydraulic valves, pipe connectors, equipment oil ports, conventional automotive oil circuits and general machinery.
2. FKM Brass Bonded Washer
FKM fluoroelastomer + brass combination gasket, high-performance gasket for harsh working conditions.
Features
• Superior high temperature resistance
• Great resistance to oil, solvent and chemical corrosion
• Brass metal ring with good anti-rust performance
• Longer service life under extreme operating environments
Performance
Temperature range: -40°C ~ 200°C
Resists high-temperature oil, fuel and corrosive fluids
Applications
Engineering machinery, high-temperature hydraulic systems, engine oil circuits and heavy-duty industrial equipment.
3. NBR Fully Wrapped Carbon Steel Bonded Washer
Full wrapped structure: NBR rubber completely covers the carbon steel metal ring.
Features
• Rubber fully wraps the metal edge and surface
• Better leak-proof and dustproof effect
• Prevent scratching the sealing surface during installation
• Stable sealing under vibration and fluctuating pressure
Applications
Vibrating machinery, uneven joint surfaces, projects requiring higher sealing reliability.
4. FKM Fully Wrapped Carbon Steel Bonded Washer
Full wrapped FKM rubber + carbon steel combination gasket, high temp resistant full covered bonded washer.
Features
• FKM fluororubber fully wraps carbon steel frame
• Combines high temperature & chemical resistance with full wrapped protection
• Avoid metal scratching, excellent for harsh vibrating equipment
• Strong anti-aging and anti-corrosion property
Performance
Temperature range: -40°C ~ 200°C
Resist high temperature oil, solvents and corrosive media
Applications
High-temperature vibrating equipment, heavy machinery, chemical equipment sealing.
Why Choose Our Bonded Combination Washers
✅ 4 series available: NBR carbon steel, FKM brass, NBR fully wrapped carbon steel, FKM fully wrapped carbon steel bonded washers
✅ Strict vulcanization technology ensures tight bonding between rubber and metal, no separation between rubber and metal
✅ Stable hardness, uniform compression, zero leakage sealing performance
✅ Standard sizes in stock, custom sizes supported
✅ Small trial orders, mixed orders & bulk wholesale are welcome
✅ Competitive factory price and strict pre-shipment quality inspection
Summary
• Ordinary general sealing: NBR Carbon Steel Bonded Washer
• High temp & corrosion, anti-rust metal: FKM Brass Bonded Washer
• Vibration, scratch prevention, normal temperature: NBR Fully Wrapped Carbon Steel Bonded Washer
• Vibration + high temperature & corrosion: FKM Fully Wrapped Carbon Steel Bonded Washer
Contact us to get catalog, size chart and wholesale quotation for combination gaskets.