Closed rubber grommets are often found under the name blind rubber grommets or blind cable rubber grommets. It all applies to the same type of grommets. All these models are made of top-quality rubber, natural rubber, neoprene, silicone, FKM or some similar rubber-like material. All these materials guarantee durability, resistance to both high and low temperatures. Also, except in extreme conditions, they will not crack, because they are tear-resistant. UV light and ozone cannot damage them, and they are also resistant to most chemicals, so they are often used in laboratories. All this guarantees that they will not become loose and will not fall out of the hole in which you mounted them.

Closed rubber grommets can be round and oval. You will find dozens of different models by size, where the outer and inner diameters, groove width, thickness and so on differ individually.

The most common purpose of closed rubber grommets is to be installed in a metal or plastic pipe or plate and thus provide a safe environment for wires, cables, etc. In this way, there can be no physical damage to the wires that pass through the pipes, for example, and they will also not be damaged by chemicals, UV light or water. Closed rubber grommets are watertight and airtight, so wires, cables and everything else will be completely insulated. What sets them apart from other grommets is that they do not have a hole in their middle. While many other rubber grommets have a hole through which a wire, cable or something similar should pass, closed rubber grommets, as they name suggest, are closed. That’s why this type of grommets serves to close something, not to let the cables go through it. You can choose from a variety of colors, so it can also have an aesthetic application to close some gaping hole that spoils the look.