Yes, I am pretty sure that this is silicone-free. The ingredient list is actually relatively short, compared to some other formulas. You can look up the ingredients and they are all to provide hydration & protein. I don't see any silicones in the list.
It contains: Sorbitol which is a natural sweetener and moisturizer. "Quats" which are ingredients that provide slip and detangling. Cetearyl Ethylhexanoate is an ingredient that is a hair & skin conditioner. Tocopheryl Acetate is Vitamin E. Cystine Bis-pg-propyl Silantriol is a latex polymer. Sodium PCA is a moisturizer. The ingredients that end with -ine are amino acids (proteins).
This product contains:
Water (Aqua), Cetyl Alcohol, Sorbitol, Stearalkonium Chloride, Lactamide MEA, Simmondsia Chinensis (Jojoba) Seed Oil, Cetearyl Ethylhexanoate, Tocopheryl Acetate, Ribes Nigrum (Black Currant) Seed Oil, Panthenol (Provitamin B5), Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Cystine Bis-pg-propyl Silantriol, Sodium PCA, Betaine, Glycine, Alanine, Proline, Serine, Threonine, Arginine, Lycine, Glutamic Acid, Myristamine Oxide, Polyquaternium-11, Butylene Glycol, Polyquaternium-59, Fragrance (Parfum), Disodium EDTA, Diazolidinyl Urea, Iodopropynyl Butylcarbamate.