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Dear R&D, please give me advice on percentage and mixing procedure of leave-in hair serum: - Pro Polymer Silk 4 % - Hydro Gel 3 % - Poly-Conditioner Pro 400mPa.s 2 % - 1,3- Propanediol (natural) 1 % - CTAC 1 % - BTAC 2 % - GuarCat weight-less 0. 5 % - Creatine 100 0.5 % - Biotin Express 1 % - Pure K...