A strap is normally used for doing this, there is a good few videos some in something like 15 seconds.
I have seen some suggest a screwdriver aswell, but I would have reservations to do so.
I suggest you take off the tire as carefully as you can, as you may want to have backups in future.
Tires can be dressed to perfection y'know, by hand turning the wheels using the side of a plane iron rigged up with two clamps.
(might be an idea to lay a wee off cut of ply on the machine base in-case a clamp drops and chips your paintwork)
We used it in work to make gaskets for access doors/hatches into very large oil/water emulsion tank. It is a fibre reinforced rubber. I cannot remember what adhesive I used other than it was a contact type See link to an e bay add. No idea of that particular product quality but just an example...
A bit late to the thread to be useful to you, but might be of help in future.
All the best
Well. I did it, but only after cursing Record Power (wrongly).
The tyre is 19mm wide, rubber (not blue ... softer stuff).
Non-advice from Record (their gaffer promises a video soon):
1. Soak the tyres in hot (near boiling) water for 10 minutes.
2. Mount the wheels as shown, on scrap timber, on dowels, another holding a bit of copper / plastic tubing,
the purpose of which is to roll the tyre onto the wheel.
3. Clamp the tyre into the ... track of the wheel.
4. Brute force it round and on.
4a) Untried. Remember using fairy (dish soap) to ease on bike tyres? Try that?
5. Take wheel and copper tube off 'jig'
6. Mount in vice, ease the tyre down into the V of the wheel and ease any unequal pressure round the wheel, by rolling the tube and tyre all round the wheel.
7. Fit back onto the bandsaw.
8. Set up the blade, run a test cut.
9. Go get a drink of tea / wine / beer.
Facts: The new tyre is quite short compared.
The new tyre is like.... a hard thing.
If your old tyre is working.... stick with it.
If you're not quite strong in t'arm - get help.