Door and window sealant strips are elastic band-shaped or rod-shaped materials used in building door and window components, glass and bead, glass and frame fan, frame and fan, and fan and fan. It can prevent the leakage or intrusion of internal and external media (rainwater, air, sand, etc.), and can prevent or reduce the damage caused by mechanical vibration and impact, so as to achieve the functions of sealing, sound insulation, heat insulation and shock absorption.