Gaskets, Covers, Bellows and Witches Hats

What is the difference between a PVC and an ABS cable grommet?

PVC grommets are generally more flexible and better suited for wiring that requires some degree of movement or bending. ABS grommets, on the other hand, are more rigid and offer greater resistance to impacts, weathering, and UV rays, making them ideal for fixed installations and particularly exposed environments.

How do I choose the right size cable grommet?

To choose the correct size cable grommet, it is essential to accurately measure the outer diameter of the cables that need to pass through the grommet and the thickness of the panel on which it will be installed. Choose a grommet with an inner diameter slightly larger than that of the cables (to allow for easy passage) and a thickness compatible with the panel. If in doubt, opt for a slightly larger model, which you can seal properly with marine sealant.

Can I use a split bellows for a pre-wired cable?

Yes, split bellows are specifically designed to simplify installation on pre-wired cables. Their side opening allows you to insert the cable without having to disconnect it, saving time and effort. Be sure to properly seal the bellows joint after installation to ensure a watertight seal.

What type of marine sealant should I use to install cable grommets?

It is advisable to use a polyurethane or silicone-based marine sealant, specifically formulated to withstand saltwater, UV rays, and extreme temperatures. Make sure the sealant is compatible with the materials of the grommet and panel. Follow the sealant manufacturer's instructions carefully for proper application.

How can I further protect the cables inside the cable grommet?

In addition to the cable grommet, you can use heat shrink tubing to protect individual cables within the bundle. Heat shrink tubing provides an additional barrier against moisture, abrasion, and corrosion. Be sure to choose high-quality heat shrink tubing that is resistant to saltwater and UV rays.