RST 1:

PAGID RST1 High average friction, aggressive in stop behavior with instant pedal response and release, consistently firm pedal at all temperatures, fade resistant at highest disc temperatures.  High friction compound with very good initial bite and a progressive torque curve. Very fade resistant.  Suitable for applications with high down-force and / or very high grip. 

RST 3:

RST 3 is a medium-high friction metal-ceramic compound containing steel fibers and is therefore the perfect complement of the RST product family. It captivates by its low heat conductivity. Popular applications of the RST 3 compound include rally tarmac and gravel, GT cars, Touring cars and prototype circuit racing, formula cars and club racing. Wide range of applications due to it‘s combination of bite, friction and controllability.