In the present investigation, exfoliated graphite sheets were obtained from the thermo-chemical treatment
of natural graphite flakes. In this process, the graphite expands almost 300-350 times of its original volume
and takes the shape of worms. These worms can be pressed or rolled into any desired shape without any
binder. The exfoliated graphite sheets show excellent electrical properties i.e. high dielectric constant
(ε = 6.374 ×107) and comparatively low dielectric loss (tanδ = 138) across the frequency in the range 50 Hz to
30 MHz and temperature in the range 40-300 °C. The products developed from exfoliated graphite can have
very good sealing applications in industrial areas, especially for gaskets in the automobile industries