Description EPDM Rubber Formula with unique wave design to fill a variety of gaps around doors and windows. Profile expands and contracts to seal out the elements and helps reduce heating and cooling costs. 3/8" Height. WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov