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

What’s So Special About Gasket Material for Exhaust?

Hot, Hot, HOT!! If you’re well versed in combustion engines, you likely associate exhaust systems with extreme heat. If you’re also well versed in gasket materials and how they perform in heat, you likely know that it takes a special material to withstand the conditions present in an exhaust system.

If you aren’t sure about what to look for in an exhaust gasket material, read on to learn how to identify a material that will survive in the exhaust environment.

Ideal Exhaust Gasket Material Characteristics

The harsh environments of exhaust systems can present a challenge if you don’t use acceptable gasket materials. Finding something to withstand the hot gases requires materials specifically designed to survive such conditions. What characteristics should you look for when selecting a gasket material?

1. Metal reinforcement

This provides strength and durability to maintain position in the face of the extreme conditions.

2. Heat tolerant facing material

Facing material must withstand heat of exhaust without disintegration over the life of the seal. Materials behave differently over time, be sure to choose what is best for you.

3. Abrasion resistance

This might be a factor in joints with high thermal motion, such as joints of dissimilar metals that expand and contract at different rates. In these cases, often a clad-style material is chosen. MTI offers the AR400 for situations such as this.

4. Low creep relaxation

Graphite products are a good example of a facing with low creep relaxation. This means it will not continue to lose thickness with the heat and time exposure, thus maintaining good flange loading to maintain the seal.

Making Your Decision

As we’ve said before, there is no one perfect gasket material out there for any application. There are a handful of materials that will meet the requirements of an application and it is up to you to decide which one performs best. In order to better educate yourself, you may need to talk to your trusted gasket material supplier and see what they say about a specific material and how it performs in applications similar to yours.

Until next time!Armor product comparison