High-temperature tapes can be made from a variety of heat-resistant base materials capable of maintaining their properties in high-temperature environments. Common base materials include:

PTFE (Polytetrafluoroethylene): PTFE is a highly heat-resistant material commonly used for high-temperature tapes. It remains stable at high temperatures without melting or decomposing. PTFE tapes are typically used for non-stick coatings and applications such as ovens, food processing, and packaging.

Polyimide (PI): PI is a high-performance plastic known for exceptional thermal stability. It retains its physical and chemical properties under extreme heat, making it suitable for semiconductor manufacturing, the electronics industry, and other high-temperature applications.

Fiberglass Cloth: Fiberglass cloth is a heat-resistant substrate often combined with various coatings to produce high-temperature tapes. It maintains strength and stability at high temperatures and is frequently used for thermal insulation, electrical insulation, and chemical-resistant applications.

Polyester Film (PET): Polyester film is commonly used for high-temperature tapes, as it retains its performance characteristics up to certain temperature limits. These tapes are typically used for electrical insulation and packaging.

Acrylic: Although acrylic is less heat-resistant than the materials mentioned above, some high-temperature tapes utilize acrylic substrates. These offer a degree of thermal stability, though the specific operating temperature range depends on the material's exact composition.

These substrates are typically combined with specialized high-temperature adhesives or coatings to meet the demands of various high-temperature applications. Selecting the right tape usually depends on the required temperature range, chemical resistance, and other application-specific needs.