The liquid patch. Works fast and reliably. Doc Blue seals holes in tubes, tubulars or tubeless systems. Use for repair or preventing punctures. Puncture protection liquids have been around for a long time, but all existing products were unable to meet our demanding standards. Doc Blue combines several different principles and is therefore much more effective. Finally, now there is a simple and effective solution for puncture repair and prevention in tubeless systems and tubulars. Dose Approx. 50 ml per tire. For large volume tires width 57mm or more increase the dose to 75 ml. 25ml is sufficient for racing cycle tires. Ensures effective puncture protection for approx. 3 months. Punctures are sealed automatically while riding. Doc Blue is not intended to seal large holes caused by cuts or bursts. Puncture protection and prevention fluid for UST and tubular tires Works fast and reliably One bottle treats 2 tires