If that Multi-Task tape is anything like Magic tape, it won't hold up. I tried it on a couple of smaller kit-built models and eventually had to remove the remnants.

I'm with Zippi; use clear Monokote or U-Cote. I use U-Cote, since I'd rather take a beating than mess with Monokote. A roll of clear will last, like, forever...

So, what's worse... the cracking noise as the sealant material flexes, or the digital servos buzzing???

BTW... if you use a trim iron, you can get the U-cote right down against the hinge line, adhered to both sides. My H9 Extra doesn't "crack"; but those servos make one hell of a racket.