| Types of seals | Materials of seals | Characteristics | Major applications |
|---|---|---|---|
| Rotary seals, oil seals, gland Gaskets, mechanical seals | Nitrile rubber (NBR) | Materials of general-purpose seals | Oil seals |
| Acrylic rubber (ACM) | Materials of heat-resistant and abrasion-resistant seals | ||
| Silicone rubber (VMQ) | Materials of heat-resistant and abrasion-resistant seals. Low oil resistance. | ||
| Fluororubber (FKM) | Materials of heat-resistant and oil-resistant seals | ||
| Fibers for braided Gaskets | Materials of seals with wide applications. Low sealing property. | Gland Gaskets | |
| Expanded graphite | Materials of seals applicable to high-pressure and high-temperature environments. | ||
| Metallic foils | Materials of thermal-radiation and abrasion-resistant seals. | ||
| Hard materials (Cemented carbide, ceramics, special steel, etc.) | Used in combination with soft materials. | Mechanical seals | |
| Soft materials (Carbon, copper alloy, PTFE, etc.) | Used with hard materials in sliding motion. | ||
| Reciprocating seals, lip Gaskets, squeeze gaskets, reciprocating oil seals | Nitrile rubber (NBR) | Materials of general-purpose, heat-resistant, cold-resistant, and oil-resistant seals | Lip Gaskets, squeeze gaskets, oil seals |
| Urethane rubber (AU) | Materials of high-strength and abrasion-resistant seals. | Lip Gaskets, squeeze gaskets | |
| Silicone rubber (VMQ) | With a wide operating temperature range but low oil resistance. | Squeeze gaskets | |
| Fluororubber (FKM) | Materials of heat-resistant, oil-resistant, and abrasion-resistant seals | Lip Gaskets, squeeze gaskets | |
| Polytetrafluoroethylene (PTFE) | Materials of abrasion-resistant and chemical-resistant seals | Slip rings, back-up rings | |
| Polyamide resin (PA) | Materials of abrasion-resistant and high-strength seals | Back-up rings | |
| Isolation seals, boots, dust covers, diaphragms, accumulators | Chloroprene rubber (CR) | Materials of weather-resistant and flex-resistant seals | Boots, dust covers, diaphragms |
| Nitrile rubber (NBR) | Materials of general-purpose seals | Diaphragms | |
| Fluorosilicone rubber (FVMQ) | Materials of fuel-resistant seals | Diaphragms | |
| Ethylene propylene rubber (EPDM) | Materials of gas-tight and water-resistant seals | Diaphragms, boots, dust covers | |
| Fluororubber (FKM) | Materials of heat-resistant and chemical-resistant seals | Diaphragms, dust covers | |
| Magnetic fluid seals | Hydrocarbon magnetic fluid | General-purpose materials | HDD, etc. |
| Fluorine magnetic fluid | Magnetic fluid for heat-resistant applications | Vacuum devices, etc. | |
| Gaskets | Non-metallic gaskets | Superior in sealing property due to its soft property | O rings, rubber sheets, PTFE sheets |
| Semi-metallic gaskets | Using metals and non-metals in combination | Metallic jacket gaskets, spiral gaskets | |
| Metallic gaskets | Used under severe conditions such as high temperature or high pressure | Metallic O rings, metallic flat gaskets |
Materials and features | General-purpose seal technology | Technologies | NOK Corporation
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