Freudenberg Sealing Technologies designed and manufactured the first Simmerring® in1929. It continues to deliver innovative solutions at the highest level.

As the aftermarket distribution arm of the Freudenberg Group, CORTECO can draw on many decades of that manufacturing expertise. Our range is derived from more than 7,000 gaskets and over 6,500 different shaft seals Simmering® and valve stem seals that are available in OEM quality today. After more than eighty years, Simmerring® is a universally recognised brand name - with a range of applications that is constantly expanding.

Head Gaskets

Cylinder head gaskets provide a seal for coolants, and lubricating oil all at the same time. The operating pressures and temperatures in modern engines are constantly on the increase. Meanwhile, engine oils contain additives that have an adverse affect on seals. This is particularly true with respect to direct injection diesel engines. Consequently, the gaskets used in such systems must compensate for ever-increasing dynamic deformation. The Corteco solution is to supply gaskets featuring a combination of different metals with different elastomer layers, carefully adapted to complement each other and preserve the integrity of the seal.

Valve Stem Seals

Valve stem seals have to withstand constantly increasing pressure, especially in modern engines. Corteco's valve stem seals, with Gas Lip Technology are specifically designed to meet these high requirements and provide the best possible protection for the engine. Kits - including all necessary valves and seals help to save time and guarantee satisfied customers - are available through Corteco.​
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Corteco gaskets & seals
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