6) The Ultimate Waterproofing Method

Step 11: 6) The Ultimate Waterproofing Method

This is the most effective method for waterproof. The first step is to open up your servo.

Now get some waterproof epoxy. Make sure its non-conductive!
Now place a big glob of the epoxy onto the circuit board. Spread the epoxy around real well. This particular epoxy expands slightly when it solidifies.
Now using a syringe, inject mineral oil into the gear casing. This is a little messy . . .
Fill it until its like 90% to the rim (the rest will spill out if you put more in).
Now after you put the O-ring onto the servo, put a little oil on it to reduce friction.
I like to tape the servo down so the epoxy can cure properly overnight.

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shax says: Jan 23, 2010. 4:32 PM

Make sure the RTV you use is non-corrosive. Some RTVs will corrode electronics.

frodobot (author) in reply to shaxJan 25, 2010. 9:23 AM

Is that the epoxy?

slomobile in reply to frodobotMar 29, 2010. 6:04 AM

RTV stands for room temperature vulcanizing. RTV is a common generic term for silicone that comes out of a tube as a gel and when exposed to air firms up to a rubbery solid. Epoxy is something different. Epoxy is not silicone, it typically comes in 2 liquid or gel parts that are mixed equally just before being applied. Check the label because the proper ratio is not always 1:1. Epoxy dries to a permanent very hard solid plastic. So epoxy and silicone RTV look the same when being applied but the final result is quite different. Yet either can be effective for waterproofing.

frodobot (author) in reply to slomobileMar 29, 2010. 9:09 AM

Wow, got me told!!! Hahahaha, thanks ;)