DUCKY PRODUCTSElectro-Seal: Electrical Water Proofing, Spray on Clear Protective Rubber Film, 11 oz

I used Ducky's Electro-Seal to protect a small PCB board which was installed in non-weather-proof box. Several weeks of foul rainy weather later and the PCB board operates as it should. It's not transparent. It dried to a milky white. Spray in a well ventilated area.

Very easy to use. Just spray on, let dry and add a second or third coat to waterproof. I used it on exterior extension cords with the device (exterior lights, blower, etc) plugged into them. Works great keeping the connection dry.

I have an ATV that I wanted to waterproof the LCD display circuit board for and I wanted to test if this stuff actually worked or not before putting it on my ATV LCD board, so I used it according to the instructions with 4 coats on an Arduino mega board and I completely soaked it under water and the 2 led lights were still on. The water did not effect it what so ever. Now one thing I will say is if your circuit board has any pins that a connector connects onto it, you might want to try to avoid putting it onto that and just use dielectric grease for the connector part since the rubber coating would be there then and might prevent it from working due to no contact with the pins. But as far as the board itself, this stuff really does water proof it like it claims. I used it on my ATV display screen circuit board after running that test and sure enough, it still works and it is now waterproof. Very happy with this product.

I use this a lot! I print 3D stuff, like phone holder, etc..., the trick is to use alcohol to clean the surface before applying the product!

dont buy this, its milky, not clear as they say and its also bubbly

Review written by my husband.I used Ducky Electro Seal to create some inexpensive lights to mount under my deck to light my patio at night.I bought LE 3W G4 LED Bulbs (2 packs of 6), G4 holders (pack of 20), some Ducky Electro Seal, and clips from the local hardware store (about 50 cents each). I inserted the light into the G4 holder and sprayed the light and holder with Ducky Seal to provide a thin waterproof coating (shake the light as you spray to reduce/remove air bubbles). I used a little padding I had lying around and the clip to mount the G4 holder/light about 1/4 to 1/2 inch below the deck board (as noted by someone else the capacitor on the back of the light is fairly large). Then connected the wiring from the G4 holder to my landscape transformer and voila - we have light. The cost was about $4 per light.Before completing my lighting project I left a test light out on top of my deck for two days in the rain (on day 2 it became 6 inches of snow). The light remained lit the whole time and the heat from the light melted the snow around the light. So, this stuff works wonderfully.

I was totally skeptical when I bought this but it is an amazing product. Spray it on a little thick and come back later and you have a perfect stretchy layer of protection over whatever you sprayed. Adheres very well and seems to be pretty durable. I got it to water proof electronics for boating. After using it the possibilities are endless.

It is perfect product for the PCB installation. The problem with the equipment was completely resolved after single application!Note: product is NOT clear. For my purposes this is not an issue.