Park Tool SAC-2 Assembly Compound

The SAC-2 is designed to increase friction between clamped surfaces, such as seatposts, stems, and handlebars. It helps components stay in place without needing to over-tighten bolts, which is especially important for protecting delicate carbon fiber parts.

Yes, it is safe and effective for use on carbon fiber, aluminum, and steel surfaces. It creates a protective barrier between these materials to prevent slipping and potential damage.

No, it is not a lubricant. While standard grease is used to make parts move smoothly or prevent seizing, this compound is specifically formulated to create friction and grip. You should not use it on threaded parts or bearings where free movement is required.

The gel-like texture makes it easy to apply precisely where you need it without making a mess. It stays in place during installation, ensuring you get an even coating on the contact area before you tighten the clamp.

No, the silicone beads are designed to provide grip without damaging the surface finish of your components. They act as a friction enhancer that allows you to achieve a secure fit at lower torque settings.