Muc-Off Road+Gravel Tubeless Tire Sealant - 5LTubeless Sealant designed for Road and Gravel. This high performance sealant keeps you pumped for whatever the road or trail throws at you. Formulated from advanced synthetic latex and a matrix of biodegradable sealing particles, it 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 Presta valve or adding it straight into the tire,