One 8 oz. bottle of Flat Attack will protect both tires for one kids bikes or both tires for one adult Cruiser Bike. Leaves no oily residue. When a hole is too big to seal, you can still patch it like normal. Bicycle Flat Attack is liquid goo that seals small holes in the inner tube. This sealant is made to go directly into the inner tube using the valve stem on the bike tire. No chemical wipes are needed. Safe to the environment, to people and to pets. No poisonous or toxic chemicals.