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The material is made of Aflas (FEPM), which has improved pressure resistance and excellent chemical resistance, as well as resistance to strong acids, strong alkalis, and steam. Additionally, it surpasses Perfluoro (FFKM) in amine resistance and possesses rare properties such as radiation resistance. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, supporting the selection of appropriate O-rings in terms of both material and size. * Various fluorine rubber types, including FEPM, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

Made of urethane rubber, it possesses extremely excellent physical properties, making it highly resistant to pressure and playing a very important role as a high-pressure sealing material. In addition to oil resistance, it is extremely brittle against water and has poor weather resistance. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also supports appropriate O-ring selection in terms of both material and size. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The material is made of fluororubber (bivalent type), which excels in heat resistance, chemical resistance, oil resistance, and weather resistance, and also has high hardness, making it capable of withstanding pressure. Before JIS B2401:2012 defined FKM-90, it did not belong to any official standards. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in general standard sizes according to JIS standards but also supports the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

Made of ethylene propylene rubber, it excels in water resistance, chemical resistance, and weather resistance, but has poor oil resistance. Before JIS B2401:2012 defined it as EPDM-70, it was treated under public standards as types 3 of the old JIS standard or types 5 of the JASO F404 standard. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in general standard sizes according to JIS standards but also supports the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Water and sewerage pipe fittings
• Power generation facilities
• Water Supply Facilities

Made of chloroprene rubber, it has oil resistance and weather resistance. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, in addition to the standard sizes according to JIS standards, and we support the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings

Made from hydrogenated nitrile rubber, it possesses excellent physical properties, making it highly resistant to pressure, as well as having heat resistance, oil resistance, and weather resistance. Before JIS B2401:2012 defined HNBR-70, it did not belong to any public standards. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, in addition to the standard sizes specified by JIS standards, and we support the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

This is a material made of perfluoroelastomer, which has significantly improved heat resistance to a very high level. It possesses the best high-temperature characteristics among current rubber materials while also having excellent chemical resistance. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, and we support the appropriate selection of O-rings in terms of both material and size. * Various fluororubbers, including perfluoro, are the materials that Sakura Seal Co., Ltd. is most proficient in. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The material is a perfluoroelastomer that combines extremely excellent heat resistance and chemical resistance, and because it does not use any fillers (non-carbon, non-metal), it excels in low particle generation and demonstrates excellent plasma resistance. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, and we support the appropriate selection of O-rings in terms of both material and size. * Various fluororubbers, including perfluoro, are the materials that Sakura Seal Co., Ltd. is most skilled in. * We also accommodate shapes other than O-rings.

• Safety and consumables

This is a special material that has excellent plasma resistance while maintaining a high cost advantage. Because it does not use any blending agents, it excels in low particle generation and demonstrates excellent plasma resistance in dry processes for semiconductors and liquid crystal-related equipment. It is effective as a lower-tier alternative to the non-filler type heat-resistant perfluoro material "FluoroPower FFN (FFKM-Plasma Resistant)." Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from extremely small O-rings to large diameter rings, in both general standard sizes according to JIS standards and various other sizes, supporting appropriate O-ring selection in terms of both material and size. * Various types of fluororubber, including perfluoro, are the materials that Sakura Seal Co., Ltd. specializes in the most. * We also accommodate shapes other than O-rings.

• Safety and consumables

Made of fluororesin (PTFE), it excels in chemical resistance, heat resistance, and surface lubricity. It is widely known by the common name Teflon, and while it has inferior elasticity and resilience compared to rubber materials, it exhibits a certain level of sealing performance. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, supporting the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• accessories
• Safety and consumables
• Water and sewerage pipe fittings

Among the materials made of nitrile rubber, acrylonitrile is present in large quantities, allowing it to be used for fuel oil due to its excellent oil resistance. However, it is inferior in weather resistance. Before JIS B2401:2012 established NBR-70-2, it was referred to as Type 2 (old JIS standard = JIS B2401:2005). Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also supports the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The material is made of silicone rubber, which excels in heat resistance, cold resistance, and weather resistance, but has inferior oil resistance and physical properties. Additionally, due to its softness, it is suitable for use in low-strength grooves. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also supports the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Water supply facilities
• Safety and consumables
• Water and sewerage pipe fittings

Made of nitrile rubber, it has high hardness and excellent pressure resistance. It possesses oil resistance and abrasion resistance, but is inferior in weather resistance. Before JIS B2401:2012 defined it as NBR-90, it was referred to as Type B (old JIS standard = JIS B2401:2005). Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, in addition to the general standard sizes specified by JIS standards, and we support the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The material is made of silicone rubber, which excels in heat resistance, cold resistance, and weather resistance, but has inferior oil resistance and physical properties. Before JIS B2401:2012 defined VMQ-70, it was referred to as Type 4C (old JIS standard = JIS B2401:2005). Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in general standard sizes according to JIS standards but also supports the appropriate selection of O-rings in terms of both material and size. * As of now, there are no materials that meet the standards of VMQ-70 as defined by JIS B2401:2012. * We also accommodate shapes other than O-rings.

• Water supply facilities
• Safety and consumables
• Water and sewerage pipe fittings

It is the most versatile material made of nitrile rubber. It has oil resistance and abrasion resistance, but it is inferior in weather resistance. Before JIS B2401:2012 defined it as NBR-70-1, it was referred to as Type A (old JIS standard = JIS B2401:2005). Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, in addition to the general standard sizes according to JIS standards, and we support the appropriate selection of O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

O-rings are the core products of Sakura Seal Co., Ltd. We offer a wide variety of materials ranging from general-purpose materials according to JIS standards to high-performance materials such as Perfluoroelastomer, and we mold them into various sizes from standard dimensions to special dimensions. Among them, O-rings made of fluororubber are the products that Sakura Seal excels at the most. We provide not only general-purpose FKM materials but also various fluororubber materials with special properties, including FFKM materials. Sakura Seal's O-rings meet quality requirements considering harsh usage environments, price demands arising from the ever-changing market conditions, and short delivery time requirements.

• Work tools
• Water and sewerage pipe fittings
• Railway Construction

We manufacture and sell a wide variety of materials with various characteristics of Sakura seals, ranging from tiny micro O-rings to large-diameter extra-large O-rings. In addition to sizes based on the Japanese Industrial Standards JIS B2401, we offer a range of sizes subdivided by various industries and support appropriate size selection along with groove design.

• Work tools
• Water and sewerage pipe fittings
• Railway Construction

The properties and characteristics of O-rings, such as heat resistance, chemical resistance, and compression set, are generally determined by the performance of the material. Sakura Seal Co., Ltd. responds to a wide range of performance requirements across various industries with a rich lineup of materials. In addition to general-purpose materials based on JIS standards, we offer various fluorine rubber materials with distinctive properties, including the "Fluoro Power Series," which features high-performance materials with Perfluoroelastomer (FFKM) at the top, and the "Fluoro Up Series," characterized by low adhesion, low friction, low sticking, and low outgassing, to support appropriate material selection.

• Work tools
• Water and sewerage pipe fittings
• Railway Construction

The KS standards established for the oil and pneumatic industry are size series used for motion and cylindrical surface fixation. Sakura Seal Co., Ltd. not only offers general materials based on JIS standards but also provides various high-performance materials, including the "Floro Power Series" featuring Perfluoroelastomer (FFKM) at its peak, and the "Floro Up Series," characterized by low adhesion, low friction, low sticking, and low outgassing. We support the appropriate selection of O-rings in terms of both size and material.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The ISO standards established by the International Organization for Standardization are primarily utilized outside of Japan. Sakura Seal Co., Ltd. produces various high-performance materials, including the most in-demand NBR-70-1 (1A) and, as needed, the Perfluoroelastomer (FFKM) at the top of the range, known as the "Floro Power Series," as well as the "Floro Up Series," characterized by low adhesion, low friction, low sticking, and low outgassing. We support the appropriate selection of O-rings in terms of both size and material.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The current standard only includes O-rings, but in the old JIS B 2290, there were specifications for gaskets with square and round shapes for vacuum flanges, which are still in use today. Sakura Seal Co., Ltd. still manufactures each shape, and particularly for larger diameters, they can be produced in custom dimensions.

• Power generation facilities
• Water Supply Facilities

Currently, the standard only includes O-rings, but in the old JIS B 2290, there were specifications for gaskets with square and rounded shapes for vacuum flanges, which are still in use today. Sakura Seal Co., Ltd. continues to manufacture each shape, and especially for larger diameters, they can be produced to any specified dimensions.

• Power generation facilities
• Water Supply Facilities
• others

Currently, the standard only includes O-rings, but in the old JIS B 2290, there were specifications for gaskets with square and round shapes for vacuum flanges, which are still in use today. Sakura Seal Co., Ltd. continues to manufacture each shape, and especially for larger diameters, they can be produced to any specified dimensions.

• Power generation facilities
• Water Supply Facilities
• others

Made of perfluoroelastomer, it has extremely excellent chemical resistance and also excels in heat resistance and mechanical properties. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, supporting the appropriate selection of O-rings in terms of both material and size. * Various fluororubbers, including perfluoro, are the materials that Sakura Seal Co., Ltd. specializes in the most. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

It is a white type of material made from perfluoroelastomer, which has extremely excellent chemical resistance and, due to the absence of carbon black as a filler, also excels in cleanliness and plasma resistance. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also supports the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including perfluoro, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Plastering and painting work

Made from fluororubber (type 3), this material has excellent chemical resistance and heat resistance, and is also resistant to strong acids and steam. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small to large diameter rings, in addition to the standard sizes according to JIS standards, and we support the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

This material is a white type made of fluororubber (type 3), which boasts excellent chemical resistance and heat resistance. It does not use carbon black as a filler, resulting in superior cleanliness (sanitary properties). Additionally, it has resistance to strong acids and steam. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, supporting the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings

This is a fluororubber (terpolymer) material with improved heat resistance. It also possesses excellent chemical resistance and has resistance to strong acids and steam. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, in various sizes beyond the general standard sizes according to JIS standards, and we support the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

A fluororubber (terpolymer) material with improved pressure resistance, featuring excellent chemical resistance and heat resistance, as well as resistance to strong acids and steam. It also excels in blister resistance (explosion-proof properties) and has passed the RGD test (ISO 23936-2 certification). Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, supporting appropriate O-ring selection in terms of both material and size. * Various types of fluororubber are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Railway Construction
• Pipeline Construction

This is a material made from perfluoroelastomer, which has significantly improved heat resistance to a very high level. However, due to the development of Fluoropower FFS, which surpasses all performance characteristics including heat resistance and chemical resistance, we now recommend switching to it. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, and we support the appropriate selection of O-rings in terms of both material and size. * Various fluororubbers, including perfluoro, are the materials that Sakura Seal Co., Ltd. is most skilled in. * We also accommodate shapes other than O-rings.

• Safety and consumables

This material is a white type of perfluoroelastomer with improved heat resistance and excellent chemical resistance. Its low particle characteristics are enhanced by the absence of carbon black, and it demonstrates outstanding plasma resistance. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small to large diameter rings, not only in standard sizes according to JIS standards but also supports appropriate O-ring selection in terms of both material and size. * Various types of fluororubber, including perfluoro, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables

The material is a perfluoroelastomer that has improved pressure resistance and heat resistance, and it also possesses excellent chemical resistance. Additionally, it excels in blister resistance (explosion-proof properties) and has passed the RGD test (ISO 23936-2 certification). Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also supports the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including perfluoro, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Water and sewerage pipe fittings
• Railway Construction
• Pipeline Construction

The material is made of Byteon ETP (FFKM-E), which has excellent chemical resistance and is also resistant to polar solvents, strong acids, and strong alkalis. It is effective for cost reduction as a lower compatibility alternative to Perfluoro (FFKM) material. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, and we support the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including FFKM-E, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The material is a white type made from Baiton ETP (FFKM-E), which has excellent chemical resistance and is also resistant to polar solvents, strong acids, and strong alkalis. Additionally, it excels in low particle generation due to the absence of carbon black as a filler, and it has good plasma resistance. As a lower-cost alternative to Perfluoro (FFKM) material, it is effective for cost reduction. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes and materials, supporting appropriate O-ring selection in both material and size. * Various fluororubbers, including FFKM-E, are the materials that Sakura Seal Co., Ltd. specializes in the most. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Clean Room

The material is made of Aflas (FEPM), which has excellent chemical resistance and is also resistant to strong acids, strong alkalis, and steam. Additionally, it surpasses Perfluoro (FFKM) in amine resistance and possesses rare properties such as radiation resistance. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, in both general standard sizes according to JIS standards and various sizes and materials, supporting the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including FEPM, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

The material is a fluororubber (terpolymer) with improved cold resistance, possessing excellent low-temperature characteristics, as well as chemical resistance and steam resistance suitable for use in strong acids. Sakura Seal Co., Ltd. offers a wide range of O-rings, from extremely small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, supporting the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including cold-resistant FKM, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

Conductive fluororubber (tertiary type) material prevents the accumulation of static electricity and avoids charging. It also excels in heat resistance and cold resistance, and is equipped with chemical resistance and steam resistance that can be used with strong acids. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes, supporting the appropriate selection of O-rings in terms of both material and size. * Conductive FKM and various types of fluororubber are the materials that Sakura Seal Co., Ltd. specializes in the most. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Clean Room

Made from fluorosilicone (FVMQ), this material has excellent cold resistance and also possesses oil and alcohol resistance. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, not only in standard sizes according to JIS standards but also in various sizes. We support the selection of appropriate O-rings in terms of both material and size. * We also accommodate shapes other than O-rings.

• Safety and consumables
• Water and sewerage pipe fittings
• Railway Construction

This material is made of fluororubber (type 2) that reduces phenomena such as stickiness and gas release, which are characteristics of rubber, making it ideal for high vacuum applications. Additionally, its heat resistance and chemical resistance are comparable to those of general-purpose FKM. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, in various sizes and specifications according to JIS standards, and we support the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including the Floro-Up series, are our specialty at Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Water and sewerage pipe fittings
• Power generation facilities
• Water Supply Facilities

This material is made of fluororubber (type 2) that reduces the stickiness characteristic of rubber materials, maintaining low adhesion and low friction over a long period. Additionally, its heat resistance and chemical resistance are comparable to those of general-purpose FKM materials. Sakura Seal Co., Ltd. offers a wide variety of O-rings, ranging from very small O-rings to large diameter rings, in both standard sizes according to JIS standards and custom sizes, providing support for appropriate O-ring selection in terms of both material and size. * Various types of fluororubber, including the Fluoro Up series, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Water and sewerage pipe fittings
• Power generation facilities
• Water Supply Facilities

This material is made of fluororubber (type 2) that reduces phenomena such as stickiness (tackiness), adhesion, and gas release, which are characteristic of rubber materials. It has performance in heat resistance and chemical resistance comparable to that of general-purpose FKM. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, in various sizes and specifications according to JIS standards, and supports the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including the Fluoro Up series, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Water and sewerage pipe fittings
• Water Supply Facilities
• Sewerage facilities

This material is a type of fluororubber (type 3) that has been designed to reduce phenomena such as the stickiness and adhesion characteristic of rubber materials, as well as gas release, to a certain extent while providing high vacuum resistance. It also possesses excellent heat resistance and chemical resistance, including resistance to strong acids and steam. Sakura Seal Co., Ltd. offers a wide range of O-rings, from very small O-rings to large diameter rings, in various sizes, in addition to the standard sizes based on JIS standards, and supports the appropriate selection of O-rings in terms of both material and size. * Various types of fluororubber, including the Fluoro Up series, are the specialty of Sakura Seal Co., Ltd. * We also accommodate shapes other than O-rings.

• Water and sewerage pipe fittings
• Power generation facilities
• Water Supply Facilities

We can manufacture U-packings (Y-packings) with basic shapes and materials, as well as packings with special shapes and materials, including dust seals. Please feel free to contact us.

• others

We offer a wide range of V-packings made of rubber (with or without fabric, NBR or FKM) and PTFE (also available with fillers such as glass or graphite) in various dimensions. Please also consider our adapters.

• others

You can consider the shapes of each manufacturer centered around the Sakura seal brand. We also handle a large number of non-standard oil seals, special sizes, and oil seals made from special materials, so please feel free to contact us.

• others