ThreeBond's effective, temporary flat tire repair requires no tools. For best results, foreign object should be removed before inflating. Aerosol can inflate tire to moderate pressure in only 20 seconds. Upon resuming riding, white foaming fluid spreads evenly inside tire, sealing leak. Not effective for large holes and sidewall punctures. Works at temperatures 23 degree F and above. For temperatures below 23 degree F, container may be warmed with hands (but not with flame) before using. Sold each.