Dimethicone and Dimethiconol are both friendly silicones and can both be washed out with a sulfate- free shampoo. As long as they are washed out after 4-5 days, they will not create build up on the strands. If you see labels such as Dimethiconol Hydroxystearate, these are No go silicones, so it is important to note whether there is another word next to the words Dimethiconol. If it is listed alone, then it is fine!