I have about 700 of these http://www.aliexpress.com/store/product/DC12V-input-WS2811-pixel-node-100pcs-a-string-injection-molding-type/701799_722405450.html from Ray. I LOVE them and they worked great last year. As I have said in previous posts I had 2 pixel failures after they went up. Only one of which required a repair. I did an inspection of my pixels and some do show some signs of water intrusion past the LED/Silicone jacket. I know that some silicones are acidic and I don't want to harm the board or put something in there that would attack the led prongs. However, I do want to do something to protect the pixel. So my options are 1-Inject each pixel with a non acidic silicone using a meat syringe. 2-Inject each pixel with dielectric grease using a meat syringe. 3-Use silicone to seal the edge where the LED meets the silicone jacket. The problem with #1 is I have read of heat build up issues, not sure if this would be a problem with our boards as they don't really give off a lot of heat. #2, I can see the pixel getting hot and the grease oozing out of the hole used to inject it and getting on the roof and everything else. Of course I could go between the jacket and LED to inject. #3, only downside I can see is maybe distorting the color if I'm not careful applying the silicone. Maybe yellowing of the silicone?