Hot Splicing vs. Vulcanizing for Bonded Gaskets

Bonded GasketsHot splicing uses heat, pressure, and a film splice to join the ends of rubber profiles into bonded gaskets. This joining technique uses either a conventional heating source or infrared (IR) light and polyethylene (PE) film. Hot splicing creates strong bonds at the molecular level and generally provides better results than vulcanization, a bonding technique that uses uncured rubber instead of a film splice.

Choosing the best way to bond rubber gaskets can be a complex decision, however. The profile material is just one of many considerations. You also need to consider the size and shape of the seal, production quantities and costs, and the way that lengths of rubber are cut. In addition, it’s important to inspect and install your gaskets properly to ensure reliable sealing and prevent avoidable waste.

Is hot splicing better than vulcanizing for the rubber gaskets that you need? Let’s take a closer look. (more…)

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Vulcanized Gaskets and Rubber O-Rings

Hot SplicingLearn 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.


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