Thanks for the reply Curious_character,
Are there any alternatives to this `Nyogel'? I reside in Australia, haven't been able to find anything by that name. How much difference is there between WD-40 or other oil/grease and this specialist `Nyogel'?
Anyone know what these `retainer rings' in the tailcap are?
WD-40 is not actually a lubricant, but a corrosion inhibitor. (the WD stands for "Water Displacement"). It lubricates, but not for long. I think the first reply eludes to this. Also it is petroleum based, you don't want to use anything petroleum based on rubber. Petroleum based greases and lubricants destroy rubber.
You want to find a silicone based lubricant. A PTFE (non brand name Teflon) lubricant should be fine also. A quick note on Silicone spray lubricants that claim to be rubber safe: I have been warned to test all "rubber safe" silicone sprays before actual use by spraying them in a styrofoam cup first. If the cup melts, then the carrier agent mixed with the silicone will destroy the rubber.
As far as where to find in Australia (I wonder if you're in Perth?), any auto parts store should have Silicone dielectric grease. That should work fairly well I'd imagine. Silicone dielectric is a fairly light grease.
If you want a heavier Silicone grease there is one called Shin-Etsu (brand name) manufactured in Japan. I have been told this is one of the best Silicone greases available. It is kind of expensive, $15.00- $20.00 usd for a slightly larger than toothpaste size tube. It is white and much heavier than Silicone dielectric, and a little heavier than Nyogel. It is available, or can be ordered if not in stock at any Honda dealership. (they use it on the rubber seals of S2000 convertible tops)
I have seen Nyogel for sale on the internet also. I think a link I followed from another thread on this forum. I'm sure you could search here or google and turn up some results if you don't mind ordering off the internet.
Actually you could order any of those greases off the internet, I have seen all three. Good Luck.
This place has Nyogel:
http://www.lighthound.com/ (use their search)
This place has Shin-Etsu for $12.00
http://www.handa-accessories.com/ (in the Honda section under S2000 any Model Year)
A picture:
http://www.handa-accessories.com/shin.jpg
Surefire was using Nyogel. I don't know if that has changed.
The ring in the tailcap of your Fenix is most likely holding it's switch in place, unless I misunderstand the question.