Slime Tube Sealant is a liquid sealant that instantly seals punctures as they happen. Slime Tire Sealant is specially formulated for use in tube bike tires. Slime is a non-aerosol, non-toxic, non-hazardous, and non-flammable solution, an environmentally friendly blend of fibers, bolymers and binders that will prevent and repair flats for up to 2 years. Instantly seals punctures up to 1/8" (3mm) punctures.