The invention relates to pretreatment agents for keratin fibers, which include, based on its weight, 0.00001 to 10 wt. % of at least one 4-morpholino-methyl-substituted silicone, which includes in each case at least one of the structural units of the formulae (I), (II) and (III) described herein, wherein * represents a bond to one of the structural units (I), (II) or (III) or an end group B (Si-bound) or D (O-bound) B represents a group &mdashOH, &mdashO&mdashSi(CH3)3, &mdashO&mdashSi(CH3)2OH, &mdashO&mdashSi(CH3)2OCH3 D represents a group &mdashH &mdashSi(CH3)3, &mdashSi(CH3)2OH, &mdashSi(CH3)2OCH3 A represents an O-bound structural unit (I), (II) or (III) or a O-bound oligomeric or polymeric radical including structural units of the formulae (I), (II) or (III) or half of a connecting O atom to a structural unit (III) or represents &mdashOH n, m and o represent whole numbers between 1 and 1000 and include at least 50 wt. % of water.
