Learn about hot splicing for rubber gaskets, and how vulcanization creates O-rings, door gaskets, window gaskets, and other spliced seals.
Hot splicing or vulcanization is a cost-effective joining technique for creating continuous seals or endless gaskets from cut lengths of rubber products. First, a heat-activated adhesive is applied to the ends of sponge or solid profiles. In addition to rectangular profiles, rubber products such as round cords, industrial tubing, and irregularly-shaped rubber profiles can be hot spliced, too.
Next, the ends of the profiles are pressed together and placed in a hot mold or vulcanizing press. The heat activates the rubber-based glue, and pressure from the mold or press creates a reliable, attractive joint for continuous sealing. Proper dwell time is important, and hot spliced gaskets should be stored under controlled conditions in warehouse environments according to standards such as DIN 776 or ISO 2230.