Spider Chalk™ Black Widow Liquid Chalk 4oz (100+ applications)Black Widow is an innovative antibacterial liquid chalk formula specifically designed for CrossFit and weight lifting athletes. Chalk typically rubs off during a long sweaty workout. Not anymore. Our liquid chalk uses 8 ingredients formulated by top chemists. All other liquid chalks use the same ingredients: alcohol, chalk, scent. We created Black Widow specifically for athletes who sweat during workouts and need chalk that keeps hands dry. 1.