EMI (Electromagnetic Interference) gaskets are used to provide effective shielding against electromagnetic interference in electronic devices and systems.  Some reasons why EMI gaskets are important:

• Electromagnetic Compatibility (EMC): Electromagnetic Compatibility (EMC) refers to the ability of electronic devices, systems, and equipment to function properly in the presence of electromagnetic interference (EMI) and to limit their own emissions of electromagnetic energy. EMI gaskets are crucial for ensuring electromagnetic compatibility within electronic devices. They help prevent the emission of electromagnetic radiation from electronic components, as well as protect the device from external electromagnetic interference.
• Signal Integrity: Signal integrity refers to the quality and fidelity of electrical signals as they travel through electronic systems or components. It is crucial in digital systems, high-speed data transmission, and analog circuits to ensure that signals are accurately transmitted and received without distortion, degradation, or errors.  EMI gaskets help maintain the integrity of electrical signals by containing electromagnetic emissions and preventing external interference that could degrade or distort the signals.
• Regulatory Compliance: Many industries, such as aerospace, telecommunications, automotive, and medical devices, have strict regulations regarding electromagnetic emissions. Compliance with these standards generally involves conducting EMI emission tests using appropriate testing methods and equipment. These tests measure the conducted and radiated emissions to ensure they fall within the specified limits. Compliance documentation, such as test reports and declarations of conformity, may need to be prepared and provided to regulatory authorities or customers. EMI gaskets are essential for meeting these regulatory requirements and obtaining certifications.
• Environmental Sealing: EMI (Electromagnetic Interference) gaskets involve using gaskets or seals that provide both EMI shielding and protection against environmental factors such as dust, moisture, and other contaminants. These gaskets are designed to create a reliable and effective seal, preventing the ingress of environmental elements while maintaining the desired level of electromagnetic shielding.
• EMI gaskets typically consist of conductive materials such as metal-filled elastomers, conductive foam, or conductive fabric. These materials help attenuate or block electromagnetic waves, reducing the risk of interference from external sources or preventing emissions from escaping the device. 

Overall, EMI gaskets are critical for maintaining electromagnetic compatibility, ensuring signal integrity, complying with regulations, protecting sensitive components, minimizing crosstalk, providing environmental sealing, and offering design flexibility in electronic devices and systems.