Use pliers to remove any foreign object from the puncture and mark the damaged area with chalk. 

Ream the hole multiple times from both the inside and outside of the tire using a carbide cutter. 

Thread the STEM plug through the insertion tool (not necessary for plugs with integrated wire). 

Remove the protective film from the STEM plug and coat it with Super Valkarn vulcanizing cement. 

Apply a small amount of Super Valkarn into the puncture channel. 

Pull the plug through the tire using pliers from the outside, ensuring part of the plug protrudes inside the tire. 

Cut the inner end of the plug to leave 2–3 mm above the tire’s inner surface. 

Position the MR patch over the puncture and mark a slightly larger area with chalk. Ensure the direction arrows point toward the bead of the tire. 

Clean and chemically roughen the marked area using Liquid Buffer. Remove dirt and grease with a scraper. 

Use a pneumatic vacuum to clear away dust and rubber particles. 

Evenly apply Super Valkarn to the prepared surface and wait until it dries completely. 

Remove the protective layer from the MR patch without touching the bonding area. Apply it to the tire, ensuring correct alignment. 

Press the patch firmly using a roller, starting from the center outward to eliminate air bubbles. 

Cut the protruding end of the plug on the outer side of the tire, leaving 2–3 mm. 

Seal the repaired area with Maruni Sealiner to prevent air leaks.