Copper Exhaust Gasket

At Kriloha Ltd., we understand that an exhaust leak is more than just a noise—it’s a loss of engine efficiency and a potential safety hazard. Exhaust flanges are notoriously difficult to seal because they are subject to “Thermal Galloping,” where the manifold and the cylinder head expand at different rates. The Kriloha Copper Exhaust Gasket is engineered specifically to bridge this gap. As a premier global supplier of heavy-duty industrial seals, Kriloha Gaskets has mastered the metallurgical balance required to keep your exhaust system silent and secure.

The science behind the Kriloha copper seal is Thermal Compliance. When you bolt down a steel manifold against an aluminum head, the gasket is the only thing preventing a leak during the heat-up phase. Because our copper is “dead-soft,” it performs a “Micro-Interference Fit.” The copper is forced into the tool marks and microscopic pits of the flange, creating a molecular-level barrier. Furthermore, because copper is one of the best thermal conductors on earth, it helps equalize the temperature between the two joining surfaces, reducing the risk of the manifold warping or “bowing” over time.

Manufacturing these gaskets at Kriloha involves precision high-pressure stamping to ensure perfectly flat parallel faces. We offer these in various styles, including solid flat rings, embossed (raised-rib) rings, and fold-over “crush” styles for recessed ports. Whether you are sealing a 10,000 HP marine engine or a high-performance street header, Kriloha Copper Exhaust Gaskets provide the thermal stamina and mechanical softness required for a permanent, high-heat seal. By choosing Kriloha Ltd., you are investing in a product that combines the ruggedness of metal with the conformability of a soft seal.

Primary Use Cases

High-Performance & Racing Engines: The industry standard for turbocharger flanges, headers, and collector rings where exhaust temperatures are extreme.
Marine Diesel Engines: Providing a corrosion-resistant and heat-stable seal for wet and dry exhaust manifolds.
Industrial Generators: Reliable sealing for heavy-duty stationary engines that run at constant high temperatures.
Motorcycle Exhaust Systems: Ideal for crush-fit exhaust port gaskets where a gas-tight seal is required in a small footprint.
Air-Cooled Engines: Essential for engines that rely on the gasket to help dissipate heat from the cylinder head to the exhaust piping.

FAQs

Why use copper instead of the standard composite exhaust gaskets?

Composite gaskets often have a paper or fiber core that can dry out, shrink, or blow out over time. Solid copper will never burn, blow out, or deteriorate, regardless of the exhaust pressure or temperature.

Does a copper gasket require any sealant?

For most clean, flat surfaces, a copper gasket seals perfectly dry. However, for heavily pitted or older manifolds, a thin coating of high-temperature copper-based RTV or “Copper Coat” spray can help fill larger imperfections during the initial crush.

How do I know if the gasket is “soft enough”?

Kriloha batch-tests every run for hardness (typically 40-60 HV). You should be able to see a slight indentation from the flange on the gasket after it has been torqued and then removed; this indicates the metal has “flowed” correctly.

Can I reuse these gaskets?

Yes, copper gaskets are often reusable. If the gasket is not distorted or thinned out excessively, it can be cleaned and reinstalled. Some enthusiasts choose to “re-anneal” them with a torch to restore softness, though Kriloha recommends a new gasket for critical industrial applications.

What sizes does Kriloha offer?

We maintain a vast inventory of standard IDs, ODs, and thicknesses (from 0.5mm to 3.0mm). We also provide custom-cut gaskets for specialized turbo flanges (T3, T4, etc.) and large-bore industrial exhaust systems based on your specific CAD drawings or samples.