- NON TOXIC –PLANT BASED!! Introducing our Tubeless Sealant for Road and Gravel -A high-performance sealant that keeps you pumped whatever the road or trail throws at you. Formulated from advanced synthetic latex, natural mineral flakes and bamboo fibres, it instantly seals holes up to 7mm. Plus, it’s completely non-toxic and allergy-free, so your only worry will be smashing that KOM. Application is as simple as squeezing it through your Prestavalve or adding it straight into the tyre, and thanks to our advanced polymer technology, the sealant bonds to the inside tyre wall like a suit of armour, ready for battle the second a puncture strikes. Seal it, pump it, and ride hard. Our Tubeless Sealant for Road, Gravel, and CX has got your back (and front!)