Politubes manufactures a complete range of spiral-wound tubes in Mylar® or Nomex®, specifically designed for use in flange insulation kits for gas pipelines, oil pipelines, industrial piping systems, and sealing applications.
These tubes provide effective isolation between metal components, helping prevent galvanic corrosion and ensuring optimal cathodic protection across the entire assembly.

Thanks to their highly reliable structure, BoltShield™ tubes deliver long-lasting electrical insulation, mechanical integrity, and moisture resistance, even in demanding operating conditions. This ensures extended component life and reduces the risk of premature degradation of flange systems.

Mylar® and Nomex® spiral-wound tubes are available according to customer-specific drawings or in imperial sizes or standard dimensions:
M4 – M5 – M6 – M8 – M10 – M12 – M16 – M20 – M24 – M27 – M30 – M33 – M36 – M42 – M45 – M48

The Mylar & Nomex tube acts as both a dielectric and thermal insulator, protecting screw and clamping bolts from discharges, leakage currents, and potential electrical failures.

Nomex® and Mylar® are registered trademarks of DuPont.