Stans NoTubes Original Tubeless Sealant is ideal for converting to tubeless and preventing flats. It seals punctures up to 6.5mm and is easy to apply to one bicycle tire. The low-viscosity formula stays liquid for 2-7 months, offering long-lasting protection. Made from natural materials, it is environmentally safe and can be injected through valve stems with removable cores, making it compatible with tubes and tubular tires. It resists freezing down to -28°C, making it suitable for all riding conditions.