Retanning agent for a soft and fluffy touch The leather chemical Syntan SF 156 is a retanning agent for a soft and fluffy touch. Suitable applications include: shoe upper, bag leather, garment, automotive and upholstery. Automotive Bags & leather goods Garment Shoe Upper Upholstery Syntan SF 156 is a non-astringent retanning agent. It relaxes the fibres and dyestuffs, syntans and fatliquors can penetrate deeper and more evenly. The resulting leathers have an outstanding fluffy softness. Syntan SF 156 gives a fine and even milling pattern in all parts of the hide. Syntan SF 156 ensures full and level dyeing with very little bleaching. TDS request Request a TDS of product TDS Sample request Request a sample of product Request