What types of sealers are used in body manufacturing and what are their functions?

Body sealers include: Hem flange sealers (flexible, pump into closure hems for water seal and corrosion protection); seam sealers (applied over body joints for water and dust intrusion prevention); anti-flutter adhesive (dampens panel vibration, bonds inner to outer panels); underbody coating (thick chip-resistant coating protecting floor and wheelhouses); cavity wax (sprayed into box sections for corrosion protection); and windshield adhesive (structural urethane bonding glass to body). Application methods include robot-applied extrusion, spray, and manual caulk. Proper application requires correct bead size, placement, and adhesion to ensure function through vehicle life.