Quick Answer
The Flywoo X30 superhydrophobic spray is the fastest way we have found to waterproof FPV drone electronics. Two to three sprays, two to three minutes drying time, and your flight controller repels water like a lotus leaf. It replaced the silicone brush-on conformal coating in our workshop because it is faster, cleaner, and does not leave the sticky residue that attracts dust.
The Dew That Killed a Flight Controller
A customer brought in a SpeedyBee F405 V4 flight stack that died after landing in damp grass. Not a puddle. Not rain. Morning dew on the grass at his local park. The moisture wicked up the motor wires, bridged two pads on the ESC, and shorted the board. A £100 stack gone from something a £20 can of Flywoo X30 would have prevented.
We see moisture damage more than almost any other failure mode in our workshop. England averages over 120 rainy days per year. Scotland gets closer to 170. Even on dry days, relative humidity regularly sits above 80% for morning flights. Your electronics face a constant low-level threat from British air alone.
Why We Switched From Silicone to the Flywoo X30
For years we used traditional silicone conformal coating. It works. The problem is the process: shake the bottle, mask every connector with Kapton tape, brush thin even coats, wait 30 to 60 minutes for each layer to dry, then leave overnight before powering on. Effective, but slow and messy. The glossy silicone residue picks up dust and lint from the field.
The Flywoo X30 takes a different approach. Instead of sealing electronics under a rubbery film, it deposits a micro-nano structure that makes the surface actively repel water. The contact angle is above 160 degrees. Water beads up and rolls off. It dries in two to three minutes. No masking, no brush, no overnight cure. The coating is invisible apart from a faint white cast, and it does not attract dust.
The X30 also scores well on thermal conductivity at 3.3 W/mK, which means it will not trap heat around your components the way some thick silicone coatings can. One 56.7g can treats roughly 15 to 20 boards, which works out to about £1 per board.
What to Coat (And What Not to Touch)
Always coat: Flight controller PCB (both sides), ESC board (component side), GPS module PCB like the Matek M10Q-5883 GPS, and VTX board (component side only). These have exposed SMD pads that bridge easily when damp.
Never coat: USB connectors, antenna elements, camera lenses, motor bearings, button contacts, or plug-in connector pins. The X30 reduces glass permeability by about 30%, so keep it away from camera lenses and sensor windows.
For GPS modules, spray the back and edges but keep the ceramic patch antenna on top completely clear. The patch needs unobstructed sky view. A coated GPS takes significantly longer to get a satellite lock.
The Two-Minute Application Method
Shake the can for ten seconds. Hold it 15 to 20cm from the board and spray two to three even passes. The coating dries in two to three minutes at room temperature. That is it. No brush, no Kapton tape, no overnight wait.
Coastal flyers or anyone dealing with salt spray can add a second coat after the first dries. The X30 is non-volatile and the coating stays effective for months when undisturbed. For active freestyle builds that take impacts, we re-spray during regular maintenance. The coating is easily removable with a cloth if you need to rework a joint.
Apply coating as the last step, after all soldering and bench testing. Follow our pre-flight checklist first, then spray. If you need to rework a joint later, wipe the coating off the area, solder, and re-spray.
What the X30 Will Not Save You From
Superhydrophobic coating does not protect against full submersion, high-pressure water, or prolonged salt water exposure. If you crash into a pond, water finds its way into connectors, between stacked boards, and into motor windings where the coating cannot reach.
The X30 is also not a gap filler. It coats surfaces but will not seal the gap between a stacked FC and ESC. For builds that face genuine wet-weather flying, combine the spray with sealed frame designs and careful component placement. Our vibration checklist covers frame sealing that complements the coating. We also cover wet-weather strategies in our UK weather flying guide.
Browse our flight controllers and GPS modules for boards we have tested with the X30 spray.
FAQ
Q: How is the Flywoo X30 different from traditional silicone conformal coating?
A: Traditional coating seals electronics under a rubbery silicone film applied with a brush. The X30 deposits a micro-nano superhydrophobic layer from a spray can. It dries in minutes instead of hours, does not leave a sticky residue, and actively repels water rather than just forming a barrier. It is also easier to remove if you need to rework a board.
Q: Do I need to remove the X30 coating before soldering?
A: The coating rubs off easily with a cloth or your finger. Wipe the area clean, solder as normal, then re-spray the exposed section. No need to burn through it the way you would with silicone coating.
Q: How long does the Flywoo X30 coating last on a drone?
A: On a bench or shelf, the coating can last for years. On a 5-inch freestyle build that takes regular impacts, we see good integrity for 100 to 200 flights before high-friction points wear thin. We re-spray during our regular maintenance cycle, which takes about two minutes per board.