Z04 sintered pads are the most widely used Brembo pads in the World Superbike Championship: they consist of special compounds agglomerated through an adhesive-free sintering process.
They are real factory pads and are also available for the most popular street legal supersport bikes. Due to the compounds used, the friction coefficient is higher than 0.8 already at 50°C, and does not fall below this threshold until a temperature of 400°C is reached.
The lubricants added to the initial compound ensure consistent, smooth braking even when disc temperatures are high. This makes brake fade, i.e. the loss of braking efficiency, less likely. Abrasives also help to keep friction levels high by keeping the discs clean and removing deposits on the braking band