Finish Line Fiber Grip – 16oz Tub. Finish Line Fiber Grip is specially designed to create friction and reduce slippage between clamped carbon fiber surfaces. Fiber Grip eliminates the need to over tighten clamps to achieve secure connections. Over tightening can cause internal fractures and fatigue of carbon fiber parts. Apply Fiber Grip in a thin film to clamping areas of stems handlebars seat posts and seat tubes. Tested and approved by leading carbon fiber component manufacturers.