Your tire must be as flat as possible to inject the Slime. You will know you are successfully removing the valve core when air starts hissing out of your tire.

If your valve cores are fixed (they won’t twist off), then you will not be able to install Slime (we recommend our pre-filled, self-sealing Slime tubes instead). CAUTION: Not all tubes have removable valve cores. If you have Presta valves: Using your fingers, gently twist the knobby ball near the top of your valve core to remove it. Slowly twist the tool counter-clockwise to remove your valve core. This is the valve core and it needs to be removed in order to install Slime. When you look inside the top of the tire valve stem, you will see a metal cylinder in the very center. If you have Schrader valves: Take the valve cap off your valve stem. Twist it off the bottle and use the knobby tool in the center to engage the valve core. The black cap on your bottle of Slime is a valve core removal tool. Slime can be inserted with the valve stem located in any position, but it works best if you position the valve stem so it sits in the upper half of the tire. Written Instructions: Step 1: Position the tire

Watch this short installation video below, or scroll down for step-by-step photo instructions. Installing Slime Tube Sealant into your bicycle tires is simple and fast. Fortunately, Slime Tube Sealant can prevent and repair flat bicycle tires instantly for up to two years. Thorns, goat heads, glass, nails … bicycle rides are literally littered with hazards for your thin bike tires. There are many, many ways that a bicycle tire can go flat.

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