So, what you are really meaning to say is,
"I looked in the rule book, searched in the rule book, scoured the rule book and couldn't find a rule against tape, yet someone keeps insisting that there is a rule against using tape on the robot. Have I missed something?"
Right? That is what you've done... you haven't just posted here because you were too lazy to actually go to
the rule book, and type "tape" into the search box, and see if anything came up?
There were, at one time, rules against using tape on your robot except for very specific, appropriate, applications. But I haven't seent those rules for several years now... so if you can't find something in the rule book that prevents you from using it... it's good. Even for structural applications.
But do take some time to read the rule book carefully... you may find other rules that restrict material usage and it is a LOT better to know about them now than when you get to the competition.
Jason