What exactly are you trying to do? If you are installing sticky-backed decals, such as a large, single item like a national insignia forget the tape. Use a soap solution on the plane, slide the decal into position and then squeegee out the liquid, blot and allow to dry. But if you have a string of lettering which must be lifted, as a unit, from the vinyl sheet then you need a strip of tape to "transfer" the lettering. Transfer is a function here, not a type of material. You can use a low tack tape such as blue painter's tape.