The 3M 08612 Windo-Weld Round Ribbon Sealer Kit provides a precise, pre-formed butyl rubber seal for non-structural windshield, back-lite, and quarter-light installations in professional auto body applications. This kit features controlled compressibility for easy installation, ensuring the ribbon sealer will not squeeze out and provides long-lasting performance. It is designed to prevent light from contacting the pinchweld. Each kit includes one 15-foot roll of Windo-Weld Round Ribbon Sealer and setting blocks, offering sufficient material to replace one windshield or backlight. This pre-formed mastic butyl cord requires no cure time, offering an instant bond, and is recommended for use with 3M 08617 adhesion promoter and 3M 08642 metal primer.