A one-part moisture-curing liquid-applied waterproofing membrane comprising - at least one isocyanate-functional polyurethane polymer; - at least one aldimine of the formula, obtained from a condensation reaction of at least one amine of formula (III a) and at least one aldehyde of formula, and - at least one aldimine of the formula, obtained from a condensation reaction of at least one amine of formula (III b) and at least one aldehyde of formula, wherein A 1 is an m-valent hydrocarbyl moiety of molecular weight in the range of 28 to 5'000 g/mol optionally containing ether or urethane groups, A 2 is an n-valent hydrocarbyl moiety of molecular weight in the range of 28 to 5'000 g/mol optionally containing ether or urethane groups, R 1 and R 2 are the same or different C 1 to C 12 linear or branched alkyls, or are joined together to form a divalent linear or branched C 4 to C 12 hydrocarbyl moiety which is part of a 5- to 8-membered carbocyclic ring, R 3 is hydrogen or a linear or branched C 1 to C 12 alkyl or arylalkyl or alkoxycarbonyl, R 4 and R 5 are the same or different linear or branched C 1 to C 20 alkyl or cycloalkyl or aralkyl optionally containing ether groups, or are joined together to form a divalent linear or branched C 4 to C 12 hydrocarbyl moiety which is part of a 5- to 8-membered heterocyclic ring which, besides the nitrogen atom, may contain an ether or thioether or tertiary amino group, R 6 is a monovalent C 6 to C 20 hydrocarbyl moiety optionally containing ether, carbonyl or ester groups, and m and n are from 2 to 6; whereby one of the two aldimines of formulae and is derived from a polyoxyalkylene di- or triamine, while the other aldimine is derived from a di- or triamine containing no ether groups; and where by the ratio between the number of the aldimino groups of the aldimine of the formula and the aldimine of the formula is in the range of 90/10 to 50/50. - at least one isocyanate-functional polyurethane polymer; - at least one aldimine of the formula, obtained from a condensation reaction of at least one amine of formula (III a) and at least one aldehyde of formula, and - at least one aldimine of the formula, obtained from a condensation reaction of at least one amine of formula (III b) and at least one aldehyde of formula, wherein A 1 is an m-valent hydrocarbyl moiety of molecular weight in the range of 28 to 5'000 g/mol optionally containing ether or urethane groups, A 2 is an n-valent hydrocarbyl moiety of molecular weight in the range of 28 to 5'000 g/mol optionally containing ether or urethane groups, R 1 and R 2 are the same or different C 1 to C 12 linear or branched alkyls, or are joined together to form a divalent linear or branched C 4 to C 12 hydrocarbyl moiety which is part of a 5- to 8-membered carbocyclic ring, R 3 is hydrogen or a linear or branched C 1 to C 12 alkyl or arylalkyl or alkoxycarbonyl, R 4 and R 5 are the same or different linear or branched C 1 to C 20 alkyl or cycloalkyl or aralkyl optionally containing ether groups, or are joined together to form a divalent linear or branched C 4 to C 12 hydrocarbyl moiety which is part of a 5- to 8-membered heterocyclic ring which, besides the nitrogen atom, may contain an ether or thioether or tertiary amino group, R 6 is a monovalent C 6 to C 20 hydrocarbyl moiety optionally containing ether, carbonyl or ester groups, and m and n are from 2 to 6; whereby one of the two aldimines of formulae and is derived from a polyoxyalkylene di- or triamine, while the other aldimine is derived from a di- or triamine containing no ether groups; and where by the ratio between the number of the aldimino groups of the aldimine of the formula and the aldimine of the formula is in the range of 90/10 to 50/50. A 1 is an m-valent hydrocarbyl moiety of molecular weight in the range of 28 to 5'000 g/mol optionally containing ether or urethane groups, A 2 is an n-valent hydrocarbyl moiety of molecular weight in the range of 28 to 5'000 g/mol optionally containing ether or urethane groups, R 1 and R 2 are the same or different C 1 to C 12 linear or branched alkyls, or are joined together to form a divalent linear or branched C 4 to C 12 hydrocarbyl moiety which is part of a 5- to 8-membered carbocyclic ring, R 3 is hydrogen or a linear or branched C 1 to C 12 alkyl or arylalkyl or alkoxycarbonyl, R 4 and R 5 are the same or different linear or branched C 1 to C 20 alkyl or cycloalkyl or aralkyl optionally containing ether groups, or are joined together to form a divalent linear or branched C 4 to C 12 hydrocarbyl moiety which is part of a 5- to 8-membered heterocyclic ring which, besides the nitrogen atom, may contain an ether or thioether or tertiary amino group, R 6 is a monovalent C 6 to C 20 hydrocarbyl moiety optionally containing ether, carbonyl or ester groups, and m and n are from 2 to 6;