What is the DART? The DART is Stan's solution to fix damaged tires faster, easier, and better than existing plug tools. While traditional tire plugs try to wedge rubber strips into a puncture, the DART creates a chemical reaction with your Stan’s sealant to quickly form a permanent airtight bond. The dual actions of the DART include the mechanical fill created by inserting a piece of material into the puncture, and a chemical reaction that activates our sealant. The DART is the best solution for repairing and sealing slices and large punctures in tubeless mountain, road, and gravel bike tires.