Topical use for the preservation of a human body or animal of a composition containing: (a) at least one polyoxymethylene dialkyl ether (POM) of formula (I): R- (OCH2) n-OR '(I) in which R and R ', the same or different, represent an alkyl radical, linear or branched, having 1 to 5 carbon atoms and n is an integer value between 1 and 8, and / or at least one acetal of dialdehyde of formula (II): ** Formula ** in which R2, R3, R4 and R5 independently represent an alkyl radical, linear or branched, having 1 to 8 carbon atoms, or R2 and R5 and / or R3 and R4 together and with the two oxygen atoms to which a saturated or unsaturated 5 or 6-membered ring is attached optionally substituted with one or more groups selected from OH, CH2OH or an alkyl radical, linear or branched, having 1 to 8 carbon atoms； and R1 represents a CH-R6-CH group in which R6 forms a bond or represents a linear or branched alkylene radical comprising from 1 to 5 carbon atoms or a saturated or unsaturated carbocycle comprising from 3 to 8 carbon atoms； or R1 is a saturated or unsaturated carbocycle comprising from 3 to 8 carbon atoms, (b) at least one biocidal agent selected from formaldehyde, sulfur dioxide, sodium hydrogen sulphite, sodium disulfite, sodium sulfite, potassium sulphite, potassium disulfite , bronopol, 1,2-benzothiazol-3 (2H) -one, dodecylguanidine monohydrochloride, glutaral, methylene dithiocyanate, N, N "'- 1,6-hexane-diylbis [N'-cyanoguanidine] polymer monohydrochloride and hexamethylene diamine / polyhexamethylene biguanide, 2-butanone peroxide, 3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate m-phenoxybenzyl / permethrin, quaternary ammonium chlorides, bis (trichloromethyl) sulfone, boric acid, N, N- diethyl-m-toluamide, 2-methyl-2H-isothiazol-3-one, the compounds of formula (C3H4O) n. (C3H4O2) m in which n>； m, polyvinylpyrrolidone iodide and mixtures thereof, and (c) optionally , at least one pro-penetrating agent.Uso tópico para la preservación de un cuerpo hu
