Stan's NoTubes DART is the best solution if you're looking for a fast and durable tire repair. It doesn't matter if you ride a gravel bike, cross country bike, MTB or road bike. The DART will work well for repairing any type of tire.
DART - DUAL ACTION REPAIRfor TUBELESSstrongly distinguishes itself from the repair kits on the market because it works on two levels - mechanical and chemical. It not only mechanically plugs the hole formed in the tire, but chemically seals it, permanently repairing the damage. The plastic from which DART's patches are made is flexible and adapts perfectly to the shape of the hole or cut. An added advantage is that you don't have to cut the part of the patch protruding from the tire. A latex-based sealing fluid is required to trigger a chemical reaction to permanently patch the damage.
The rod on which the cartridges sit is made of ultralight, corrosion-resistant, incredibly strong carbon fiber. In addition, the DART has a built-in wrench for unscrewing the valve insert, as well as a place for a second insert, which can be quickly used if a larger damage needs to be patched.