Thermo Tec Shield 2″x50ft Thermo shield is a combination of materials laminated together to provide a barrier against the extreme conditions that under bonnet components are exposed to. radiant and conductive heat in the under bonnet enviroment can destroy hoses and wiring by drying out or melting the rubber and plastic of these components. this aluminised adhesive backed tape is great for wrapping the hoses and wires you don”t want to remove. thermoshield reflects radiant heat up to 2000 degrees f.