This is a very simple, ease, cheap and effective way to waterproof your plane with minimal amount of weight. The product I use is Plastidip; it runs about $5-6 a can, which is more than enough even for a large plane. It is available at all Home Depots in the color Black, but is available in some colors on occasion, and is available in all colors online (See link at bottom). It‘s a spray on latex rubber paint that is very easy to apply with the simple following steps. Doing this is essentially like coating your plane in a liquid latex glove, so it is watertight and protects your plane in crashes. ALSO, HOTGLUE STICKS TO IT PERFECTLY!!!
First, either tape off or remove ALL electronics to avoid getting product into them.
Step 2: When applying your coats you want to spray at about 6"-8" away, never closer otherwise it will glob and warp your foam. ALWAYS make sure the tip of the spray nozzle is clean after each coat! I have discovered that left over Plastidip dries on the nozzle, and the next time you pick up the can to spray again it will not mist it will spit beads of product all over your plane and leave bumps, so just make sure the nozzle is clean. Drying between coats should be about 5-10 min in a WELL-VENTILATED AREA! The surface should be a flat finish and dry to the touch.
-DO THE FOLLOWING STEPS TO THE TOP AND BOTTOM
OF THE PLANE AT SEPARATE TIMES!!! (BOTTOM FIRST TOP SECOND)
-1st Coat- Light even passes over the whole plane one time (DO NOT ATTEMPT TO COVER IT ALL IN ONE COAT)
-2nd Coat- Repeat first step
-3rd Coat- Go over the plane 2 times with 2 light coats but apply them at the same time, no drying period in between, but do not apply so much that it will run
-4th Coat- Go over the plane a final time with one more light coat and cover all the Simi-white areas that still might be visible, you might have to repeat this step again with a drying period in between coats to insure fill coverage.
-5th Coat- Mist the whole model one more time with one light coat 5”-6” away using quick passes.
-Allow at least an hour for the product to cure before you fly!!!
- When a coat is dry it should look like this, a flat finish and dry to the touch.
Final Product, Good luck and have fun flying!
Colored Plastidip here: https://www.dipyourcar.com/pages.php?pageid=9