Flashlight Reviews

Nyogel 779ZC, Nyogel 759G, Nyogel 760G Lubricants

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Nyogel 779ZC, Nyogel 759G and Nyogel 760G are special type of high-quality, synthetic lubricant greases from Nye Lubricants Inc. Nye products are carefully engineered materials, formulated for a specific application marketed under SmartGrease™ brand.

Nyogel 779ZC is relatively thick, higher in viscosity grease that offers a higher level of damping and water protection. NyoGel 779ZC is silica thickened, synthetic hydrocarbon grease intended for mechanical components. It is designed and rated for temperatures from -20°C to 125°C. NyoGel 779ZC contains special additives for reducing wear of metal surfaces. NyoGel 779ZC works well for the flashlight o-rings at the bezel and tail cap as well as on threads on flashlights.

NyoGel 759G is relatively soft, lower in viscosity grease that offers a smoother feeling and lower level of damping. Like 779ZC, Nyogel 759G is also a silica thickened, synthetic hydrocarbon grease. Nyogel 759G is designed for the lubrication and protection of electrical contacts. NyoGel 759G is rated for temperature ranging from -40°C to 125°C.

NyoGel 760G is very similar to 759G. In fact, NyoGel 759G is now replaced by NyoGel 760G. NyoGel 760G offers slightly higher thermal stability and is rated for temperature ranging from -40°C to 135°C. In addition to that, NyoGel 760G has UV dye for inspection and copper passivator is added to it for enhanced corrosion prevention. Like Nyogel 759G, the NyoGel 760G is relatively soft, lower in viscosity grease offering a smoother feeling and lower level of damping. NyoGel 760G is also a synthetic hydrocarbon grease that is designed for the lubrication and protection of electrical contacts.

Note that NyoGel Nyogel 779ZC, Nyogel 759G and Nyogel 760G are not electrically conductive but designed for lubricating surfaces that are conductive. They offer great environmental and corrosion protection and extend the life of components in use.

Lighthound no longer carries NyoGel 759G and at the time of this review, Lighthound offers the latest Nyogel 779ZC and Nyogel 760G. This review is for 25 gram tubes of Nyogel 779ZC and Nyogel 759G that we have been using since as early as July 2006. In this review we share our experience of over 2 years using Nyogel 779ZC and Nyogel 759G lubricants. 25 grams is enough lubrication for hundreds or even thousands of applications. For more than 2+ years we have been using on considerable number of flashlights and yet we have about 25% of supplies still available. Supply for most users may last even longer.

For those who cant wait to read full review, please be advised that these are excellent lubricants and head straight to www.lighthound.com to procure Nyogel 779ZC and Nyogel 760G. NyoGel 779ZC and Nyogel 759G worked extremely well for the flashlight O-rings at the bezel and tail cap as well as on threads. For those who want to know how it performed over the period of 2 years and need to know important information on taking care of flashlights with Nyogel 779ZC, Nyogel 759G (Nyogel 760G) read on.

Technical Data for Nyogel 779ZC, Nyogel 759G, Nyogel 760G Lubricants:
Nyogel Technical Data Summary: Here is the technical data summary for Nyogel Lubricants as per the available data sheets at the time of review.
Technical Data Summary for Nyogel Lubricants
Lubricant Kinematic
at 40°C
1/10 mm
Unworked Worked 60x
Nyogel 779ZC 2000 mm2/s 143 - 20 to 125 243 - Clear to Light
Yellow, Smooth
- 269 294
Nyogel 759G 390 mm2/s 150 - 40 to 125 300 - 30 Light Yellow,
0.89 310 to 340 317
Nyogel 760G 390 mm2/s 150 - 40°C to 135 300 - 30 Water White,
0.89 266 275
As you can see, technically the Nyogel 759G and 760G have very similar properties where as the Nyogel 779ZC is a different kind of lubricant with considerably different properties.

Definitions & Info:
Kinematic Viscosity is the absolute viscosity of a fluid divided by its density. Also known as coefficient of kinematic viscosity. More the number, thicker is the substance / liquid.

Viscosity Index is an index showing the stability of the viscosity of an oil / liquid under temperature change, with values towards +100 for highly stable, and towards -100 for highly variable.

Temperature Range is the range for stable operation for the grease under desired conditions to offer satisfactory performance.

Flash Point is the lowest temperature at which the vapor of a combustible substance / liquid can be made to ignite momentarily in air.

Pour Point is the lowest temperature at which an oil or other liquid will pour under given conditions.

Density is the concentration of substance / liquid, measured by mass per unit volume.

Penetration is an act or process of piercing or penetrating something. Lubricating greases are subjected to penetration tests to evaluate the consistency of lubricating greases. The test known as Cone penetration test provides us measure of the consistency of a grease. Nye Lubricants Inc. perform this important test as per the ASTM D-217 Standard. This test is important because it governs the application in which a particular lubricant could be best suitable for a substance of given Kinematic viscosity. There are two types of penetration values. Unworked and worked. The worked value in above table is for 60x cycles.

Nyogel Detailed Technical Data: The detailed data sheets and MSDS sheets can be downloaded directly from www.nyelubricants.com. For your convenience, here us a table with the direct links.

Technical Data for Nyogel Lubricants
Lubricant Data sheet MSDS
Nyogel 779ZC 779ZC Data sheet 779ZC MSDS
Nyogel 759G 759G Data Sheet 759G MSDS
Nyogel 760G 760G Data Sheet 760G MSDS
In-Depth Review & Pictures:
Nyogel 779ZC & Nyogel 759G: Nothing shiny here. The pictures here show two year old used 25 gm tubes of Nyogel 779ZC & Nyogel 759G.
Nyogel Tubes

Nyogel Tubes

The tubes have pointed dispenser for easy application and limit the excess quantity.
Nyogel Tubes
Using Nyogel 779ZC, Nyogel 759G, Nyogel 760G Lubricants for Flashlight Care:
So how do we use Nyogel 779ZC & Nyogel 759G? Which one is best for a typical application? Can we use both together? We attempt to answer these questions here. Normally you can use either of Nyogel 779ZC and Nyogel 759G in any of the flashlights.

For this review, we are taking up an example of Jet I Pro. Steps shown here are for typical application process for tail cap threads. You may however apply same steps for threads on bezel end of battery tube. So now let's have a look at how tail cap threads look after quite a few battery changes. They look dirty, don't they?
Dirty Threads

Here is a closeup of threads. As you can see, they are very dirty where the battery tube ends. That's because end section has to travel more in to the tail cap switch. Threads inside the tail cap are also equally dirty.
Dirty Threads Closeup

Step 1 - Clean the threads: To clean threads we used simple tissue paper lightly soaked in pure water. Although, you can use any thing as long as it is not abrasive or damaging. Refrain from using strong solvent based cleaning solutions as they might cause damage to tail cap components and O-rings. Before beginning, we suggest you to remove O-ring. Threads on both battery tube as well as tail cap should be thoroughly cleaned. Cleaning tail cap threads is little difficult as compared to battery tube threads. You need to ensure that the negative contact spring does not get dislocated or malformed. Due care should be taken while cleaning tail cap threads. Wipe off the O-Ring with soft tissue soaked in water.
Cleaning Threads
Caution: The threads at times may be sharp and may cause injury during cleaning. Use protective gear while cleaning the threads.

Here is a closeup of cleaned threads and O-ring.
Clean Threads Closeup

Step 2 - Choosing a right Lubricant: To make things simple, you can use any one of Nyogel 779ZC or Nyogel 759G. But let's give it a little thought. Nyogel 779ZC inheritably is a thicker where as Nyogel 759G is thinner relatively. Thicker lubricant should be used when there is more gap / play between threads. Thinner lubricant should be used for finely machined threads.

Step 3 - Applying the chosen Lubricant: First apply a little amount and spread it with fingers. Put back the tail cap so that the lubricant penetrates the tail cap threads.
Applying Lubricant to Threads

Applying Lubricant to Threads

Step 4 - Ensuring even application of Lubricant: With first application, it is likely that all threads are not evenly covered. So next step is to apply even more lubricant so that all threads are covered. Ensure that you are not using way too much that it starts oozing out of threads.
Applying Lubricant to Threads

Step 5 - Finally evenly spread lubricant: Here is a closeup of evenly spread NyoGel 779ZC over the threads of both tail cap and battery tube. Notice that the O-ring is also very well lubricated.
Applying Lubricant to Threads

So when do we use the thinner version Nyogel 759G? Let's see an example. This is Zebralight H50 Q5. It has fine pitch threads on battery tube and the tail cap acts as a twist switch. You need to ensure that the operation is smooth and the switching operation does not require much efforts. The relatively thinner version Nyogel 759G is perfectly suited for such an application. Before application, we recommend you to clean the threads as explained above. You need to apply a little amount of Nyogel 759G and it will spread evenly across the threads.
Applying Lubricant to Threads

Don't forget to apply little Nyogel 759G over the O-Rings. Screw back the tail cap and try switching operation a couple of times. This ensures that Nyogel 759G has spread over entire threads and the O-rings are also well lubricated.
Applying Lubricant to Threads
The Verdict:
Over the period of more than 2 years, we have found that the Nyogel 779ZC & Nyogel 759G have proven to be very reliable thread and O-Ring lubricants. Nyogel 779ZC & Nyogel 759G work very well and do the extremely good job in lubrication, reducing wear and tear of threads. Not only that but also in conjunction with O-Rings Nyogel 779ZC & Nyogel 759G have done an excellent job to prevent dust and water entering the lights. We would highly recommend both Nyogel 779ZC & Nyogel 759G. Since Nyogel 759G is no longer available we suggest use of Nyogel 760G which is very similar to Nyogel 759G and even more improved version.

Reviewed: 2008-07-24
Updated: 2008-08-03

Buy Nyogel 779ZC, Nyogel 759G, Nyogel 760G Lubricants at www.lighthound.com
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