💦 Does KOTKING work? Yes, BUT. . . | KotKing FPV Drone & RC Waterproof Coating Review
Welcome back to rc with adam. My name is adam. Today were going to talk about coat king. I think thats, how its pronounced k o t k. I n g, and it is a silicone coating that you put on your rc electronics and it is supposed to waterproof them its its basically like kind of like a silicone, caulking kind of idea, and this is basically a competitor to the long standing conformal coating that You would put on the electronics and uh it seals them up. Basically, it keeps the water off of them. It waterproofs them. So i got this stuff because i thought well, i hadnt done any conformal coating and i thought maybe this would be a good option. So i got it to try it out and its very new, actually its only available from a few places. I got mine from race day quads now ive got about six good things to say about this and then about twice as many bad things so ill. Tell you right now bottom line up front. I didnt have the best experience with this uh coat. King honestly, conformal coating is looking a whole lot better to me right now, so i may end up just doing conformal coating, um and thats, basically the bottom line, but if you want to know why and why i came to that conclusion, you can watch the rest Of the video and ill take you through my whole testing process, so the esc is definitely working.
Lets get this stuff on there and see if it will survive some salt water lets get started with the pros and cons of coat king pros. It is durable. It is durable that is pretty nice, its like a rubbery kind of coating. It is clear, so you can see the electronics. If you have lights that need to light up, you can see them thats good, its non toxic, i think, maybe or at least its not caustic, it doesnt smell like a lot and it doesnt burn. When i put it in my eyes, no im just kidding, dont put it in your eyes, but it seems like just kind of like a silicone material. It provides a physical barrier from debris and minerals like salt in salt, water, so thats good because its it it keeps uh. You know the it encapsulates the electronics, and so even if you have like, i dont, know, rocks or sand or something its not going to like abrade a braid, its not going to yeah its not going to rub against the electronics themselves. It has high temperature resistance. You can actually touch a soldering iron to this and it will take a while for it to get like even a little bit kind of squishy, so it has good temperature resistance. They claim that it will actually dissipate the heat of the electronics so its not like youre sealing in the heat. They say it will dissipate the heat i havent actually tested that and finally, it may be good for vibration dampening or using as kind of like a glue kind of like a silicone uh gasket seal like you would use on an engine or something like that and Those are about all the good things that i can say about this now lets move on to the cons now.
First of all, this is the biggest one, its difficult to confirm. The waterproofness of the actual coating that you put on there and ill explain why, in in the next few reasons in my testing, i had to do several coats and kind of touch up areas because it was not waterproofing like it was the rest of the board. I tested this on an esc and a little brushless motor setup. Okay, here we go lets test this out, lets dunk it in the salt water uh. Oh, did you hear that the the motor started chirping thats bad, and that was the problem? Was i couldnt see where it was actually making contact or covering the surfaces, because it was all clear, whoa thats, not good when we dipped it in the water this edge? First, it it turned on the motor started running. We need to do a little bit of investigation here. Weve got our multimeter set into continuity mode, yep, hello short. What this tells me is that uh, the yellow wire and the brown wire for the signal wire and the ground wire were just slightly uncovered, and that is one of the downsides of it. Being clear is that you cant tell whats covered and whats not covered as well as you could. If it was, you know opaque, but if it was opaque, then you couldnt see like the board. So you know pick your poison and the reason why you need to be able to see where its applied and where its not applied is because it can ooze away from the taller areas and expose them.
So, on some of the components on this esc, they were kind of sticking up a bit more and they had sharp edges. So the coating was just kind of oozing down and it wasnt really like providing any coating over the metal exposed areas all right, whoa thats, not good, thats, not good at all. What is going on. Why is this happening im so sad and it doesnt coat like a coat of paint. It does adhere to the electronics, but it doesnt form a protective film. We are getting a voltage reading and we should not be getting a voltage reading. So what must have happened was the coating just slid off of there all right time to coat it again. It also is likely that youre going to need a second coat or touch up certain areas. If, if you have taller electrical components and it kind of oozes down, you probably want to build up another coating on top of those higher areas, and that could take a while, because the set time is about one hour kind of one hour until its um. You know its still kind of tacky, but it wont ooze anymore. It has been about 20 minutes and lets see what the texture is here. Oh, its still very goopy, oh its goopy, but it will sort of take a shape and then about. I dont know 12 hours or something like that overnight to where it actually is not nearly as sticky and its just kind of more of like a silicone, rubbery type of feel and its more set im, pretty sure.
Thats. The im pretty sure that thats, when its fully cured it, takes up physical space on the components. So, if youre gon na build, if youre gon na, build it up and do second coats and stuff if youre working with a really tight build, that could be a problem also its going to add more weight than normal conformal coating. But i dont know how much but its got to be more viscosity. The problem with this stuff is that its not thick enough to keep the shape that you apply so its not like a paste, but its also too thick to dunk the parts or spray the parts or um. You know apply it as i guess, as evenly as i would like, and again it doesnt really form a protective film. So you really, you really kind of need it to stay wherever you put it on the board and not have it move away now this ones annoying the nozzle consistently clogs after use like if you dont clear it out after you use it. So you you apply the coating you put the cap on because thats supposed to keep it, you know from drying up, but then you go to use it the next day and then its clogged and you got ta, take off the nozzle clean it out with, like A toothpick or a needle and then use it again, so i dont like that coat king should do like crazy glue and put a little needle in the cap so that, when you put the cap on it will unclog the nozzle and keep it keep.
It sealed up and airtight coat king also creates a physical barrier over the electronics, which makes them difficult to access or solder, and things like that so thats, one of the downsides of having a physical barrier is, if you need to get to the components its, not Very easy and finally, its not easy to remove for soldering, which i really dont like, and they claim that it is easy to remove. But i find that it is not easy to remove, because you need to kind of like cut it out and i dont really want to have to take a razor blade to a circuit board and other electronics like that. So yeah its difficult to remove. And it comes when it comes apart. It kind of comes apart in chunks, its kind of the consistency of like a gel candle, thats kind of what its like. If you break apart a gel candle and the gel is in like these weird chunky, ragged jaggedy chunks, yeah thats, what its like all right, its that were back its dry, its the next day, lets check test it out a little bit. I cant talk anymore. All right lets stick this baby in here and see what happens into our salt water uh. Oh lets, stick it in just like this, so we can see this side, because this was the side that was the problem before so far, so good. Alright lets turn it on. Finally, finally, weve passed the water dunking test.
There you have it um yeah. I i dont know what else to say about this. I i really was let down to be honest with you. I thought this would be way better. I almost feel like some sort of rtv, like just silicone gasket stuff, would work better than this, but im probably going to get some liquid conformal coating and just use. That is what im thinking, but let me know what you think in the comments down below. Let me know if youve had a similar experience and all that kind of stuff wed love to hear about it.