Rema patches and glue have chemical compounds that work together to speed up the vulcanizing process. Just that something looks similar does not mean that it is of the same class. Many people carry 2 small glue tubes in case one dried out. Heptane is a solvent for the glue and keep a container of it that is as important as a can of glue - I add some solvent if the glue is getting dense. For the road I actually carry small glass vials, off Ebay, that I fill myself. Heptane can be obviously also used for any glue residue on a tube.