Slime is an aftermarket liquid sealant that seals punctures in Schraeder tubes up to 1/8" in diameter. It is inserted into the Schraeder tube by removing the valve core and squirting it into the tube from its squeeze bottle. Slime when exposed to air and under pressure covers the interior of the puncture, then hardens and seals the air leak, all while still riding your bike.
Slime - 4 ounce bottle $ Price in Catalog
Slime - 8 ounce bottle $ Price in Catalog