In the middle of a race, there's no time to stop and fiddle with a leak. Stans has developed Race Sealant. that works faster and better than standard sealant so you can go ahead and catch the lead bag. Thanks to twice the grain size compared to standard sealant, it seals larger punctures better. allowing you to move on. Race Sealant also performs better over a wide range of temperatures and conditions saving you from the dreaded dry seal situation on the side of the road.