I have a box of 100 Rema patches and a jar of Slime rubber cement, I now see I bought in 2015.
https://www.amazon.com/Slime-1050-Ru...s%2C157&sr=8-2
Like others, I don't patch on the road but carry 1-2 spare tubes and some glueless patches and duct tape for emergency use on those disaster days with multiple flats. If you use the gluless patch, carry a hand pump as it's very much possible you will need to stop every 2-3 miles to pump the tire back up. I don't use the little portable glued patch kits anymore as in my experience, the little tube of glue dries up before you actually need it.
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '95 Gios Compact Pro, '95 Carrera Zeus, ‘81 Masi Gran Criterium, ‘81 Merckx Pro, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, Rivendell Rambouillet, Heron Randonneur, ‘92 Ciöcc Columbus EL