Step 1.   Retrieve the green Presta Valve (PV) adapter from the spout.

(Click to enlarge images)

Step 2.   Using a 3mm wrench, remove the valve core from the stem using the wrench flats on either side of the core. (If your core does not have flats in the threaded area it is a one piece valve and cannot accept sealant.)

Step 3.   After removing the core, push the PV adapter over the stem.

Step 4.   Fit the fill tube from the bottle over the adapter and squeeze the appropriate amount of Flat Attack into the tube.

Step 5.   Remove the PV adapter, wipe the stem clean and re-install the core tightening it to a snug tight. Install the tube into the tire and mount the tire on the rim. Carefully inflate to the recommended pressure and as the wheel spins the Flat Attack will coat the inside of the tube under the tread area and is now ready to seal punctures.