INVENTORY. ENGINEERING. INGENUITY.

Three simple words, but they have a big impact on how your business performs.  We know that having the right seal at the right time is crucial to your operation because industrial seals are our business.  We carry more than 12,000 SKUs including the broadest range of top-quality industry standard parts.  And if you need something custom, our engineering and design team can help assist with your unique seal requirements – plus, back it up with Dichtomatik in-house TCM brand seals, real-world scenario testing, and our warranty guarantee.

Our comprehensive line of oil seals or shaft seals cover a wide variety of applications including axles, engines, trailers and high-pressure environments. Generally, oil seals are used to seal around a rotating shaft and provide protection from dirt intrusion while retaining an oil-based lubricant within the shaft. We offer sizes in standard and metric oil seals with interchangeable SKU’s from competitors such as SKF seal and National oil seal. Whether it’s a standard metric oil seal or an intricate AP cassette seal, rest assured you will receive the best quality at competitive pricing.

Our distribution and fulfillment operations are available to assist and improve your ability to deliver on orders, provide the tools to help you sell more products to your customers and increase your bottom line by ensuring you have the right product in stock.

Your guide to finding the right Dichtomatik Oil Seal for your Application

Oil Seal Material

Dichtomatik shaft seals are made from a wide range of materials. Depending upon a customer’s application, the material color, durometer, and type can vary. Dichtomatik standard materials are NBR and FKM but other materials are available as needed and are listed below.  We understand that chemical interactions play a role in your material selection.  As an aid, a complete chemical compatibility guide is available here for you to use.

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Nitrile – Lip Code N (NBR)

NBR seals are recommended for most common applications.  Commonly referred to as a Buna Oil Seal or a Buna-N Oil Seal.  The Dichtomatik standard NBR compound is a 70-durometer rubber and are compatible with water and most common mineral oils and greases.

Complete Material Data Report

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Fluorocarbon – Lip Code V (FKM)

FKM compounds are premium lip materials offers higher temperature ratings and provide superior abrasion resistance in addition to superior wear and performance characteristics in an 80-durometer rubber.  This material is also known to many of our customers as a Viton Oil Seal.

Complete Material Data Report

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Silicone – Lip Code S (VMQ)

VMQ compounds offer the widest range of operating temperature conditions ranging from -60F to 390F (-51C to 199C).  Dichtomatik standard VMQ compound is a 70-durometer rubber.

Complete Material Data Report

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Hydrogenated NBR – Lip Code H (HNBR)

Compared to our standard nitrile compound, Dichtomatik’s 80-durometer HNBR rubber offers improved resistance to fuel, oil, heat, and chemicals.  It also has good wear resistance characteristics, which make it well suited to perform in the most severe environments.

Complete Material Data Report

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Polyacrylate – Lip Code P (ACM)

ACM compounds are recommended for higher temperature applications and works well with mineral oils and EP additives and greases.  Dichtomatik standard ACM compound is a 70-durometer rubber.

Complete Material Data Report

Measuring Seal Size for your best fit

Dichtomatik carries many sizes of both metric and standard sizes on the shelf, ready for immediate shipment in the most common profiles.  For a fraction/decimal/metric conversion chart, click here.

Finding the proper size oil seal is based upon three dimensions:

  1. Shaft Diameter / Inside Diameter (ID)
  2. Housing Diameter (Bore) / Outside Diameter (OD)
  3. Seal Width

With the case of a metric seal, numbers outlining the size may already be stamped somewhere on the exterior part of the seal. The order in which these numbers appear will represent the shaft diameter, bore diameter, and width as listed above and in this order.  So, for example, a metric oil seal stamped with 35 75 10 will have a shaft diameter of 35 mm, an bore diameter of 75 mm, and a seal width of 10mm.  These will closely align with the inside and outside diameter of the seal, but it won’t be exact as the seal presses into the bore, and the seal lip compresses onto the shaft.

But be careful.  Standard measurement seals will have similar numbering stamped on its outer face as well.  The format for standard seals however, follows an outside diameter, inside diameter, and seal width listing.  A seal with the numbers of 300 212 37 embossed on its outer face would translate into 3” on the bore, 2. 1/8” for the shaft, with a 3/8” width.  This dimensional listing distinction will help you in determining whether you are dealing with a metric or standard sized oil seal.  When adapting dimensions from a standare size seal, the fraction-to-decimal chart above may be helpful.

If however, there are no numbers stamped onto the seal, a tool such as a caliber is recommended for most accurate results.  Measuring the shaft, housing bore, and gland width in seal the seal would go into is preferable to measuring a used seal.

Image of Dichtomatik seal dimensions

Oil Seal Search

Get started here to find the right side oil seal using the oil search option below to see if Dichtomatik carries the size you need. For any Dichtomatik part number results listed below, you can click on the link in column 2 for that part number to view additional information.

If you need stock availability, pricing or to buy online, you will need to login to your ecatalog account.

Don’t have an ecatalog account, request one here.

Not finding what you are looking for?  Contact an engineer here who will help you create a totally customized solution.

Oil Seal Search

Start by selecting your measurement for a metric (mm) or a standard (in) size into the search. From there, additional selections will appear for you to enter additional information including shaft diameter (ID), bore diameter (OD), and seal width. You may enter all or some of the search information options and then simply click SEARCH NOW to see your results.

Select Measurement
Material
Style

Shaft Diameter

Shaft OD (in)
Shaft OD (mm)

Bore Diameter

Bore (in)
Bore (mm)

Width

Width (in)
Width (mm)

Click here to download the Principal TCM Shaft Seal Designs document.

Lip Style "S"

Single Lip with A Garter Spring.Generally used for sealing lower pressure applications. However, not recommended for use in applications where the surrounding environment contains any dirt or contaminants.

“T”

Twin Lip with A Garter Spring.Generally used for sealing lower pressure applications. The additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

“V”

Single LipGenerally used for sealing a non-pressure media, especially for sealing grease or viscous fluids. These seals are also used for dust or dirt exclusion.

“K”

Twin LipAs type V above, but the additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

OD Style Low-pressure single lip with garters pring without protection from contaminates. Low-pressure dual lip with garters pring with protection from contaminates. Non-pressure single lip without garters pring without protection from contaminates. Non-pressure dual lip without garter spring with protection from contaminates.
“C”

Rubber Covered O.D.This type is preferred for soft alloy or plastic housing materials, as well as cast iron or steel. It is also more suitable to use this design in a replacement environment where minor damage to the housing surface has occurred.

Rubber cover OD for improving OD sealing ability.

SC

Low-pressure single lip with garter spring. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered.

TC

Low-pressure dual lip with garter spring provides protection from contaminants. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered

VC

Non-pressure single lip without garter spring. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered.

KC

Non-pressure dual lip without garter spring provides protection from contaminants. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered.
“B”

Outer Metal Case. This type is most suitable for steel or cast-iron housing materials. The metal case gives a particularly firm and accurate seat in the housing, but static sealing on the O.D. is partially limited.

Precision ground OD surface with a lead-in chamfer for ease of installation.

SB

Low-pressure single lip with garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation.

TB

Low-pressure dual lip with garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation.

VB

Non-pressure single lip without garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation.

KB

Non-pressure dual lip without garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation.
“A ”

Outer Metal Case with Reinforcing Plate.This type is designed with an additional inner case providing increased structural rigidity when a more robust design is required. Particularly suitable for larger diameters or when the seal is fitted from behind.

Precision ground OD surface with a inner case providing increased structural rigidity.

SA

Low-pressure single lip with garter spring. Precision ground metal OD with an additional inner metal case for increased structural rigidity.

TA

Low-pressure dual lip with garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation.

VA

Non-pressure single lip without garter spring. Precision ground metal OD with an additional inner metal case for increased structural rigidity.

KA

Non-pressure dual lip without garter spring provides protection from contaminants. Precision ground metal OD with an additional inner metal case for increased structural rigidity.
“M”

Outer Metal Case with Rubber LiningSimilar to design B but an additional rubber lining covering the internal face of the steel case. Particularly suitable for applications where corrosion could be a problem.

Precision ground OD surface with a lead-in chamfer with an additional inner rubber lining.

SM

Low-pressure single lip with garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.

TM

Low-pressure dual lip with garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.

VM

Non-pressure single lip without garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.

KM

Non-pressure dual lip without garter spring provides protection from contaminants. Precision ground metal OD with a lead-on chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.
  • "S"

    Single Lip with A Garter Spring.Generally used for sealing lower pressure applications. However, not recommended for use in applications where the surrounding environment contains any dirt or contaminants.

    Low-pressure single lip with garters pring without protection from contaminates. “C”

    Rubber Covered O.D.This type is preferred for soft alloy or plastic housing materials, as well as cast iron or steel. It is also more suitable to use this design in a replacement environment where minor damage to the housing surface has occurred.

    Rubber cover OD for improving OD sealing ability.

    SC

    Low-pressure single lip with garter spring. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered.
  • “T”

    Twin Lip with A Garter Spring.Generally used for sealing lower pressure applications. The additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Low-pressure dual lip with garters pring with protection from contaminates. “C”

    Rubber Covered O.D.This type is preferred for soft alloy or plastic housing materials, as well as cast iron or steel. It is also more suitable to use this design in a replacement environment where minor damage to the housing surface has occurred.

    Rubber cover OD for improving OD sealing ability.

    TC

    Low-pressure dual lip with garter spring provides protection from contaminants. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered
  • “V”

    Single LipGenerally used for sealing a non-pressure media, especially for sealing grease or viscous fluids. These seals are also used for dust or dirt exclusion.

    Non-pressure single lip without garters pring without protection from contaminates. “C”

    Rubber Covered O.D.This type is preferred for soft alloy or plastic housing materials, as well as cast iron or steel. It is also more suitable to use this design in a replacement environment where minor damage to the housing surface has occurred.

    Rubber cover OD for improving OD sealing ability.

    VC

    Non-pressure single lip without garter spring. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered.
  • “K”

    Twin LipAs type V above, but the additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Non-pressure dual lip without garter spring with protection from contaminates. “C”

    Rubber Covered O.D.This type is preferred for soft alloy or plastic housing materials, as well as cast iron or steel. It is also more suitable to use this design in a replacement environment where minor damage to the housing surface has occurred.

    Rubber cover OD for improving OD sealing ability.

    KC

    Non-pressure dual lip without garter spring provides protection from contaminants. Rubber covered OD to improve the OD sealing ability. Internal face of the steel case is not fully rubber covered.
  • "S"

    Single Lip with A Garter Spring.Generally used for sealing lower pressure applications. However, not recommended for use in applications where the surrounding environment contains any dirt or contaminants.

    Low-pressure single lip with garters pring without protection from contaminates. “B”

    Outer Metal Case. This type is most suitable for steel or cast-iron housing materials. The metal case gives a particularly firm and accurate seat in the housing, but static sealing on the O.D. is partially limited.

    Precision ground OD surface with a lead-in chamfer for ease of installation.

    SB

    Low-pressure single lip with garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation.
  • “T”

    Twin Lip with A Garter Spring.Generally used for sealing lower pressure applications. The additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Low-pressure dual lip with garters pring with protection from contaminates. “B”

    Outer Metal Case. This type is most suitable for steel or cast-iron housing materials. The metal case gives a particularly firm and accurate seat in the housing, but static sealing on the O.D. is partially limited.

    Precision ground OD surface with a lead-in chamfer for ease of installation.

    TB

    Low-pressure dual lip with garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation.
  • “V”

    Single LipGenerally used for sealing a non-pressure media, especially for sealing grease or viscous fluids. These seals are also used for dust or dirt exclusion.

    Non-pressure single lip without garters pring without protection from contaminates. “B”

    Outer Metal Case. This type is most suitable for steel or cast-iron housing materials. The metal case gives a particularly firm and accurate seat in the housing, but static sealing on the O.D. is partially limited.

    Precision ground OD surface with a lead-in chamfer for ease of installation.

    VB

    Non-pressure single lip without garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation.
  • “K”

    Twin LipAs type V above, but the additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Non-pressure dual lip without garter spring with protection from contaminates. “B”

    Outer Metal Case. This type is most suitable for steel or cast-iron housing materials. The metal case gives a particularly firm and accurate seat in the housing, but static sealing on the O.D. is partially limited.

    Precision ground OD surface with a lead-in chamfer for ease of installation.

    KB

    Non-pressure dual lip without garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation.
  • "S"

    Single Lip with A Garter Spring.Generally used for sealing lower pressure applications. However, not recommended for use in applications where the surrounding environment contains any dirt or contaminants.

    Low-pressure single lip with garters pring without protection from contaminates. “A ”

    Outer Metal Case with Reinforcing Plate.This type is designed with an additional inner case providing increased structural rigidity when a more robust design is required. Particularly suitable for larger diameters or when the seal is fitted from behind.

    Precision ground OD surface with a inner case providing increased structural rigidity.

    SA

    Low-pressure single lip with garter spring. Precision ground metal OD with an additional inner metal case for increased structural rigidity.
  • “T”

    Twin Lip with A Garter Spring.Generally used for sealing lower pressure applications. The additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Low-pressure dual lip with garters pring with protection from contaminates. “A ”

    Outer Metal Case with Reinforcing Plate.This type is designed with an additional inner case providing increased structural rigidity when a more robust design is required. Particularly suitable for larger diameters or when the seal is fitted from behind.

    Precision ground OD surface with a inner case providing increased structural rigidity.

    TA

    Low-pressure dual lip with garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation.
  • “V”

    Single LipGenerally used for sealing a non-pressure media, especially for sealing grease or viscous fluids. These seals are also used for dust or dirt exclusion.

    Non-pressure single lip without garters pring without protection from contaminates. “A ”

    Outer Metal Case with Reinforcing Plate.This type is designed with an additional inner case providing increased structural rigidity when a more robust design is required. Particularly suitable for larger diameters or when the seal is fitted from behind.

    Precision ground OD surface with a inner case providing increased structural rigidity.

    VA

    Non-pressure single lip without garter spring. Precision ground metal OD with an additional inner metal case for increased structural rigidity.
  • “K”

    Twin LipAs type V above, but the additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Non-pressure dual lip without garter spring with protection from contaminates. “A ”

    Outer Metal Case with Reinforcing Plate.This type is designed with an additional inner case providing increased structural rigidity when a more robust design is required. Particularly suitable for larger diameters or when the seal is fitted from behind.

    Precision ground OD surface with a inner case providing increased structural rigidity.

    KA

    Non-pressure dual lip without garter spring provides protection from contaminants. Precision ground metal OD with an additional inner metal case for increased structural rigidity.
  • "S"

    Single Lip with A Garter Spring.Generally used for sealing lower pressure applications. However, not recommended for use in applications where the surrounding environment contains any dirt or contaminants.

    Low-pressure single lip with garters pring without protection from contaminates. “M”

    Outer Metal Case with Rubber LiningSimilar to design B but an additional rubber lining covering the internal face of the steel case. Particularly suitable for applications where corrosion could be a problem.

    Precision ground OD surface with a lead-in chamfer with an additional inner rubber lining.

    SM

    Low-pressure single lip with garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.
  • “T”

    Twin Lip with A Garter Spring.Generally used for sealing lower pressure applications. The additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Low-pressure dual lip with garters pring with protection from contaminates. “M”

    Outer Metal Case with Rubber LiningSimilar to design B but an additional rubber lining covering the internal face of the steel case. Particularly suitable for applications where corrosion could be a problem.

    Precision ground OD surface with a lead-in chamfer with an additional inner rubber lining.

    TM

    Low-pressure dual lip with garter spring provides protection from contaminants. Precision ground metal OD with a lead-in chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.
  • “V”

    Single LipGenerally used for sealing a non-pressure media, especially for sealing grease or viscous fluids. These seals are also used for dust or dirt exclusion.

    Non-pressure single lip without garters pring without protection from contaminates. “M”

    Outer Metal Case with Rubber LiningSimilar to design B but an additional rubber lining covering the internal face of the steel case. Particularly suitable for applications where corrosion could be a problem.

    Precision ground OD surface with a lead-in chamfer with an additional inner rubber lining.

    VM

    Non-pressure single lip without garter spring. Precision ground metal OD with a lead-in chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.
  • “K”

    Twin LipAs type V above, but the additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

    Non-pressure dual lip without garter spring with protection from contaminates. “M”

    Outer Metal Case with Rubber LiningSimilar to design B but an additional rubber lining covering the internal face of the steel case. Particularly suitable for applications where corrosion could be a problem.

    Precision ground OD surface with a lead-in chamfer with an additional inner rubber lining.

    KM

    Non-pressure dual lip without garter spring provides protection from contaminants. Precision ground metal OD with a lead-on chamfer for ease of installation. Internal face of the steel case is fully rubber covered to prevent corrosion.

Standard Seal Lip Design

The five principal lip designs, shown below identify the most common lip designs for Dichtomatik shaft seals. It is important to remember that other, more complex, designs are available for special applications. However, the lip designs shown here represent those which will fill the needs of most seal requirements.   These five principal lip designs are also supplemented by a range of more specialized designs for more specific application requirements. For additional information regarding available lip designs contact our engineering experts. 

S = Single Lip with A Garter Spring.

Generally used for sealing lower pressure applications. However, not recommended for use in applications where the surrounding environment contains any dirt or contaminants.

T = Twin Lip with A Garter Spring.

Generally used for sealing lower pressure applications. The additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

V = Single Lip

Generally used for sealing a non-pressure media, especially for sealing grease or viscous fluids. These seals are also used for dust or dirt exclusion.

K = Twin Lip

As type V above, but the additional dust lip provides increased protection for the primary lip. The cavity between the two lips can also be filled with grease to limit shaft corrosion and allow brief operation without media lubrication.

 

 


 

Standard Seal Case Design (OD Design)

The following identifies the most common case designs for Dichtomatik shaft seals. It is important to remember that other, more complex, designs are available for special applications. However, the case designs shown here represent those which will fill the needs of most seal requirements.  There are five principal case designs, described below. These five principal case designs are also supplemented by a range of more specialized designs for more specific application requirements. For additional information regarding available case designs beyond the standard listings, contact our Dichtomatik Engineering experts.

A = Outer Metal Case with Reinforcing Plate.

This type is designed with an additional inner case providing increased structural rigidity when a more robust design is required. Particularly suitable for larger diameters or when the seal is fitted from behind.

B = Outer Metal Case.

This type is most suitable for steel or cast-iron housing materials. The metal case gives a particularly firm and accurate seat in the housing, but static sealing on the O.D. is partially limited.

C = Rubber Covered O.D.

This type is preferred for soft alloy or plastic housing materials, as well as cast iron or steel. It is also more suitable to use this design in a replacement environment where minor damage to the housing surface has occurred.

F = Rubber Covered O.D.

Similar to design C but additional rubber covering fully protecting the internal steel case. Particularly suitable for applications where corrosion could be a problem.

M = Outer Metal Case with Rubber Lining

Similar to design B but an additional rubber lining covering the internal face of the steel case. Particularly suitable for applications where corrosion could be a problem.

 


Part Number Creation

Dichtomatik’s TCM line of radial lip seals incorporates the easiest and most complete part numbering system of any major seal producer on the market.  All TCM part numbers are created from the dimensions of the shaft, housing bore, and width for each seal, together with a designation for special lip materials, and the lip and case style.  Dictomatik part numbers appear differently for standard inch sizes versus metric sizes.  Three dimensions, separated by X’s always designate metric seals.  For example, a seal 25x50x10TC indicates a seal made for a 25 millimeter shaft, a 50 millimeter bore, a 10 millimeter width with a TC styple case and lip design.  Inch sizes, however, simply show 5 digits for the shaft, bore, and width.  The first two digits being the inch and and first decimal digit of the shaft size, the third and fourth digit represented the inch and first decimal digit of the housing bore, and the last being the first digit of the width dimension.  An example of a standard inch size seal part number breakdown is illustrated below:

 

All dimensions are the actual application dimensions, not the actual seal dimensions, except for the seal width.

 


 

Need a more specialized solution?

The engineering team at Dichtomatik will work closely with you to understand your project in great deal and to recommend and implement any sealing solution based upon many considerations listed below:

Shaft Specifications

Shaft Material

Shaft Hardness

Shaft Finish

Shaft Eccentricity

Tolerance

Rotating Speed

Shaft Chamfer

Housing Specifications

Housing Material

Housing Finish

Housing Tolerance

Housing Chamfer

Sealing Tolerances

Seal Storage

Temperature and Humidity

Ozone

Fumes

Insects and Rodents

Dust & Dirt

Shelf Life

The World Relies on DICHTOMATIK – Do You?

Whatever your needs, Dichtomatik US has both the stock and the expertise necessary to meet them.  If your project calls for standard or custom oil seals, contact us to find the perfect fit.  We are one of the world’s largest provider of sealing products and solutions, trusted by the largest companies around the globe.