Replacing the gasket on your Fenix flashlight

Fenix flashlights are specially designed to withstand harsh environments. Dust- and waterproof thanks to their IP68 protection rating, they are the best allies of everyday hikers and adventurers who have adopted them as part of their EDC, as well as law enforcement agencies and the armed forces. All Fenix products are made from high-quality materials such as aluminum, which contributes to their longevity. They are designed for ease of use.

The Fenix brand is synonymous with quality and performance to accompany you on your adventures. However, it is essential to take good care of your flashlight to prolong its life, avoid premature replacement and, above all, maintain its quality of illumination and autonomy.

Fenix flashlights can be damaged by a number of incidents. They are regularly in contact with elements such as water, sand and dust. Gaskets play an essential role in maintaining their watertightness.

Why is the gasket important in this flashlight ?

The seals on your Fenix flashlight play an essential role in protecting it from dust and moisture. Your Fenix flashlight is sealed by O-rings.

Wear and tear of these seals can have several origins: time, contact with a chemical product, poor positioning when screwing in the components, etc. In these cases, the integrity of the seals can be compromised. In such cases, the integrity of the lamp, batteries and LED may be at stake, damaging the performance of your lamp in the short or long term.

How do I know when it's time to replace the gasket on my Fenix lamp ?

When replacing batteries (CR123 in this case), you can tell that the gasket is in poor condition if its surface is cracked. You may also notice that the seals have lost their function, and that water has infiltrated the lamp body.

How do I replace a flashlight gasket ?

Replacing the gasket on a flashlight is a fairly straightforward task that can be carried out in just a few steps.

• step 1 : Make sure you have the right replacement gasket for your Fenix model. You'll also need a pair of tweezers and a clean cloth.

O-ring dimensions

We've found that on more common models, the O-rings used are 20mm inside diameter and 1.5mm thick, which corresponds to the following products: E35UE, PD35, PD35TAC, PD32, FD30, UC35, E20, TK09, RC11. We can therefore recommend two O-ring references :

• OR-20X1.50-EPDM70
• OR-20X1.50-EPDM80

To accurately identify your gasket, you'll need to use a caliper (or measuring cone) to measure the inside diameter, as well as the torus diameter (thickness).

If you don't have the tools to accurately measure the dimensions of the O-rings you need, refer to the technical data sheet for the lamp model you own.

• step 2 : Start by unscrewing the flashlight and removing the batteries.

• step 3 : Gently remove the damaged gasket using the pliers and clean the area with a cloth to remove any dirt or residue.

• step 4 : Place the new gasket on the gasket rim inside your flashlight housing. Make sure it's correctly positioned so that there are no sealing problems during reassembly.

• step 5 : Add the batteries and screw the casing back on. Check that the light is at optimum brightness.

By following these simple steps, you can easily replace the gasket on your Fenix flashlight, ensuring optimum performance and durability. Don't hesitate to replace the gasket as soon as you notice any signs of wear or deterioration. With proper care, your Fenix flashlight will continue to light up your adventures for many years to come.