The invention relates to a temperature-stable solution consisting of a) 0.1-10 wt.% of at least one hexamidine salt, b) 40-95 wt.% of an alkanediol with a C3 to C5 carbon chain and a cLogP of -0.2 to -1.1, c) 5-60 wt.% of water, and d) an additive or plurality of additives for adjusting the pH value of the solution to between 3.0 and 6.0 inclusive, wherein the total amount of components a) to d) is 100 wt.%.