Koch Chemie ThermoPad Polishing Sponge:

The Koch-Chemie ThermoPad is a high-quality special sponge with thermochromic properties for removing light scratches, holograms and polishing marks. The Thermo Pad is especially recommended for polishing acrylic glass headlights, as these react temperature-sensitive and the temperature of 40 - 45°C must not be exceeded during grinding and polishing.

Due to the thermochromic properties of the colour pigments in the pad, the Thermo Pad changes colour from orange to yellow from a temperature of 45°C onwards. That way the colour change serves as an indicator. The pad returns to its original colour as soon as the temperature drops again.

Compression hardness: 10. Abrasiveness: 5.