Subzero tire sealant it's formulated to maximize extreme frigid temperature; enabling riders in the far North to ride with flat protection All while offering the same quick sealing properties you've come to expect.Premium Latex coats the whole casing from tire bead to tread capSeals punctures up to 1/4" with the use of NanitesDeveloped to add as little weight to a tire as possibleMade of eco-friendly biodegradable ingredientsSubzero sealant is developed for use in below freezing conditions down to -20F