The ContiWinterContact TS830 P ContiSeal is a Performance Winter / Snow tire that was developed for the drivers of sporty coupes and family sedans looking to combine traction on dry, wet and snow-covered roads with the additional peace of mind their travels will not be delayed by typical tread area punctures. Designed to deliver self-sealing continuing mobility, ContiWinterContact TS830 P ContiSeal tires feature a sticky, viscous coating on the inside of the tire that instantly seals nail or screw punctures up to five millimeters (approximately 3/16") in diameter. The ContiSeal coating is designed to permanently fill the path of the puncture when the object is removed.