Choosing the wrong gasket material can cause leaks, heat damage, and costly rework. But what’s the best option for your engine or industrial setup?

The best exhaust manifold gasket materials are multilayer steel (MLS), graphite composite, and copper. Each suits different heat levels, surface conditions, and sealing requirements.

In this article, I’ll break down the pros and cons of each material, helping you choose the right one based on durability, heat resistance, and use case—whether for OEM, industrial, or performance applications.

What materials are exhaust manifold gaskets made of?

Exhaust gaskets must resist extreme temperatures, vibration, and corrosion.

The most common gasket materials include:

• MLS (Multilayer Steel): Made of embossed stainless sheets, ideal for high compression and heat.
• Graphite with Steel Core: Great for uneven surfaces and vibration-prone setups.
• Copper: Used in performance engines, reusable with perfect surface prep.
• Composite Fiber/Paper: Inexpensive but not durable—rarely used in OEM setups.

For an even broader analysis of failure scenarios and how to prevent them, read our article on how to fix gasket leaks.

How do different materials perform under heat and pressure?

I’ve had clients in both automotive and machinery industries switch from fiber to MLS gaskets—cutting replacements by 70%. For instance, our OEM Exhaust Manifold Gasket 17173-21020 is made with high-strength stainless steel, ideal for Toyota & Scion 1.5L engines.

What’s the most durable exhaust gasket material?

MLS is by far the most durable choice.

It consists of multiple steel layers, often with a rubber coating or embossing to enhance compression. MLS gaskets resist:

• Thermal expansion
• Combustion pressure
• Long-term fatigue

Looking for long-lasting solutions for your fleet or engine line? We explain how to select and install the right OEM gaskets in this detailed guide:
OEM Exhaust Manifold Gasket Selection Guide

Should I use graphite or MLS for industrial engines?

It depends on your engine's condition.

사용 graphite if:

• The surface is pitted or uneven
• Vibration is frequent
• Easy re-torque is needed

사용 MLS if:

• Surfaces are clean and flat
• High compression or turbo engines
• You want long-term maintenance-free sealing

Need help evaluating the right material for your OEM project? Check our manufacturer guide for custom sealing options.

How do I know if my gasket material is failing?

Material failure shows up as:

• Exhaust leaks or ticking noise
• Visible burn-through
• Flaky or broken gasket remnants

If you notice these signs, it’s time to review our gasket symptom guide and consider upgrading materials before reinstallation.

결론

MLS and graphite are the most reliable materials for exhaust manifold gaskets—choose based on engine stress, surface quality, and your maintenance schedule.

Choose materials that last

Need help selecting the right exhaust gasket material for your application?
Our engineers support OEM, industrial, and high-heat custom solutions.
📧 Email: [email protected] | 📱 WhatsApp: +86 17622979498

Related topic

Gasket Seal Manufacture: How to Choose the Right Partner for Quality, Speed & Customization?
OEM Exhaust Manifold Gasket 17173-21020: How to Select the Right One?
OEM Exhaust Manifold Gasket 17173-21020 – Fits Toyota & Scion 1.5L Engines

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