Should I add more air once I have used Fix-a-Flat to repair my tire?
Yes. Fix-a-Flat will seal punctures up to ¼” and will fill the tire with enough air pressure to get you back on the road. Immediately, drive the car for at least 2 to 4 miles and visit a gas station (or use a tire inflator) to fill your tire with the proper amount of air pressure as soon as possible. Visit a qualified tire professional at the earliest opportunity for a permanent repair or replacement.