When Should You Use the SAC-2 Carbon and Alloy Compound?

The Park Tool SAC-2 SuperGrip Carbon and Alloy Compound is a friction paste designed to increase grip between components at clamped interfaces, allowing you to use lower clamping torques without slippage on seatposts, stems, and handlebars made from carbon fiber or aluminum. It provides the friction needed to prevent rotation or slipping at the point of contact, protecting both the component and the frame from overtightening damage while maintaining a secure, slip-free connection through normal riding forces.

Carbon components require controlled torque to avoid cracking, and alloy components in carbon frames face the same challenge. The SAC-2 resolves both problems by letting you clamp securely at a torque the material can handle. A 4oz tube provides plenty of product for long-term use in a home garage or small shop.