Extreme Flight 2 Meter Vanquish F3A Assembly Manual page 15

13 Seal the bottom of the hinge gap with a strip of Ultracote or Blenderm
.
tape. Be sure to fully deflect the control surface when applying the tape or
Ultracote to allow full deflection once the gap is sealed. Repeat this process
for the other stab/elevator assembly. Before you set aside the stabs take a
moment with your covering iron and go over all of the seams with a medium
heat setting, paying special attention to the ends of thin trim stripes. At this
point clean the 2 elevator/stab assemblies with Windex and set them aside.