Gasket Material Design

Have you worked with a gasket and wondered how to improve it? The market does not always align with your exact needs. You might have a gasket material innovation in mind but don’t know how to make that a reality.

You are not alone. There are gasket material manufacturers who used to be in your situation, but they now design and engineer their own materials. They would be great resources to help you out. Depending on your expertise with material constructions, your dream material might already exist. If not, material manufacturers, especially those working with composites, have various options.

If you are interested in proceeding, be ready to answer the following questions:

1. What type(s) of applications are we looking at, and what does it need to seal?

2. What are the operating conditions and temperatures?

3. What do you like/not like about what is currently being used/proposed?

4. What are the flange conditions? Is there sufficient flange load available?

5. What is the design life of the joint? How long does the gasket need to last?

6. What is the target price range? Are we basing on price or performance?

The more specific your answers, the better a material manufacturer will understand your needs and find the best way to meet them. Challenge gasket material manufacturers  by contacting them because everyone benefits from innovation.Request a Call

The Top 6 Applications Where Composite Gaskets Excel

There are a handful of gasket materials and technologies that are acceptable for a variety of conditions within an application. However, as you venture into specific conditions, those options start to narrow – especially as you get into higher temperature and higher pressure applications.

As an experienced materials manufacturer, when we hear a customer or potential customer start talking about gasketing needs, there are certain applications where we know immediately that metal reinforced composite laminates are a great option. To help you in your planning process, we decided to put together a list of the top applications where these types of gaskets excel (in no particular order).

Look to Composites

1. Exhaust system gaskets

Composite laminates work well in exhaust systems because they tolerate heat and distortion of the flanges. They can also be made with a stainless steel core to resist corrosion and provide long term performance.

2. Aftertreatment system gaskets (DPR, EGR, etc.)

Composite materials perform well here with the rigidity of the steel core for strength and the sealability of the facing material in aftertreatment joints.

3. Manifold gaskets (exhaust/intake)

Graphite laminates are one example of a composite laminate that works well in exhaust manifold gaskets. The material helps to manage heat flow while maintaining a seal.

4. Collector gaskets

Collector gaskets are generally high temperature flanged joints that require a compressible material to seal the joint. Often, composite materials are the first choice here due to their economic advantage and compressible nature.

5. Cylinder head gaskets

Head gaskets have been successfully made from graphite composite laminates since the mid 1980’s. These gaskets perform well as they seal a variety of surfaces while managing heat and providing long-term service.

6. Aftermarket/replacement gaskets (head, exhaust, and intake applications)

Composite laminates are by far the best choice in aftermarket/replacement applications. They provide additional compressibility and conformance to seal against less-than-ideal flange surfaces while compensating for removed material such as surfaces that are refinished. Composites also provide lasting service with their ability to compress and recover in these applications.

Materials that Survive

If you’re dealing with applications that meet any of these conditions, it is important to be aware of the types of materials that are known for successfully sealing them. Once you have an awareness of the general direction you should be going in, talk to a gasket material supplier that specializes in that type of material. Then, you can narrow down your choices to the one material that is best suited for the conditions it will need to withstand.

What are the other applications where you prefer metal reinforced composites?

Aftertreatment Systems Material Guide

Year in Review: Top Blogs From Our Two Years of Blogging

Sealed-In is now celebrating its two year blog-iversary! Our viewership continues to grow, and we hope that you have enjoyed the content we have produced (and learned something too!).

As is now our annual tradition, we decided to do a recap of our most popular blogs over the last two years. See below for our top 5 list of Sealed-In blogs.

The Top 5

Is There A Difference Between Gaskets & Seals?

3 Things You Need to Consider When Deciding on EGR Gasket Material

The Great Gasket Debate: To Reuse or Not To Reuse

What is Creep Relaxation, and Why Do I Care?

Why Would I Use Composite Gaskets When I Can Use MLS?

Thank You!

As always, thank you for your readership. We hope that we are becoming one of the first places that you go for information related to gaskets and gasket materials. If there is ever a topic that you’d like us to cover, please let us know – just drop us a comment in one of the blogs.

On to year 3!Request a Call

Solid Core vs Perforated Core Gasket Materials – What Are the Features of Each?

Let’s say that you’ve decided to explore a composite gasket material solution for your application. (If you need a refresher on why you may make that decision, visit the blog post “Why Would I Use Composite Gasket Material When I Can Use MLS?”)

If you’re unfamiliar with the options and the materials used, composites can be very overwhelming. However, we’re here to help explain it as straightforwardly as possible. Basically, there are two main types of technologies used – perforated core (mechanically bonded) and solid core (chemically bonded).

Ok…so what’s what, and what are the features of each?

Perforated Core Gasket Material

Perforated core…otherwise known as mechanically bonded, mechanically clinched, or tang core. These materials are most commonly used for head gaskets, intake manifold gaskets, exhaust gaskets, and other high temperature and high pressure seal points. Below are a few features of the perforated core materials:

1. Mechanical bond requires no adhesive to deal with temperature effect.

2. Tanged core provides lateral strength for blowout resistance.

3. Tanged core provides vertical strength for load balance and torque retention.

4. Steel core perforations “grip” the facing, preventing slippage or distortion.

Solid Core Gasket Material

You may also refer to solid core materials as adhesively bonded materials. These materials are commonly used in fluid sealing applications as well as some head gaskets, intake manifold gaskets, cover gaskets, and other (lower temperature applications). Here are the features that you’ll see with solid core materials:

1. Metal core provides stiffness for ease of handling. Ease of assembly.

2. Lateral strength of laminate prevents crush and blowout of gasket and provides enhanced sealing properties. Gaskets can withstand higher pressures than non-reinforced fiber products.

3. Dimensional stability is protected. Gasket will not shrink or grow with moisture.

4. Gasket is more robust than plain fiber gaskets to survive both handling in assembly and performance in the joint.

A Material for Every Application

Between perforated core and solid core, you have a material to consider for almost every high temperature or high pressure application you come across. If you have any questions about which materials to consider for your specific project, don’t hesitate to ask your trusted gasket material supplier. You don’t need to know it all if you have a good resource for the information.

What other features do you like about these materials?

Surbond product comparison

I Need an Insulative Gasket…What Are My Options?

If you work with applications that see high or extreme temperatures, chances are, you probably need an insulative gasket somewhere in the application. Whether this is something that you have actively thought about or not, we’re here to give you the rundown about insulative gaskets and the materials they are made from.

Before we get going, we thought it would be interesting to get your thoughts on insulative gasket materials.

What type of insulative gasket material would you use?

Why Do I Need One?

Today’s engines are burning hotter than ever. With the increased temperatures, it is becoming more common to have components that must be protected from the heat. A lot of times, an easy and inexpensive way to do this is with your gasket. An insulative gasket will insulate the heat on one side of the flange, keeping the heat away from these sensitive components. You already need to invest in a gasket, and depending on the material chosen, you may also be forced to invest in a heat shield. If you make the right material selection and combine the two, you can kill two birds with one stone.

Your engine can get even hotter due to heat soak. When the engine is off, you can’t rely on the cooling systems to protect the components. Don’t fret…some gasket materials are even known for their ability to move the heat, which results in a cooling effect.

What Gasket Material Should I Select?

Let’s say that you need an insulative gasket. What material should it be made out of? There are a lot of gasket technologies out there. Which one works the best?

First, with high temperature applications, you really have two options. If we’re talking about surviving heat in general (insulation not needed), most people will select either a metal-reinforced composite laminate or embossed stainless steel (MLS/SLS). With the proper material selection, both have comparable performance levels. When you start getting more into the extreme heat (in excess of 800°F), you’ll find that you need to move more into the composites.

However, if you need an insulative gasket, your ONLY option is a metal-reinforced composite laminate, no matter what the temperature. This material is the only one with insulative properties and steel reinforcement, and the only one that can be constructed to specifically meet the needs of a particular application (if the need arises). Stainless steel shims heat up right along with everything else in the engine and won’t insulate. Composites with graphite, vermiculite, mica, and certain types of fibers are necessary to provide some heat management.

Finding the Right Composite

Talk to your trusted gasket material supplier if you are in need of an insulative gasket. Based on the requirements and the environment it will need to survive in, they should be able to give you a few options. If they can’t, keep looking until you find someone who can.

Until next time!Hi-Tex Comparison