Semi-synthetic fatliquor The leather chemical Synthol SL 335 is a semi-synthetic fatliquor. Double face Synthol SL 335 is suitable especially for Australian, USA, French and UK domestic skins, because it improves the double-skinned effect of these sheepskins. The grain remains tight that’s why Synthol SL 335 is good for Shoe Boot production, too. This leather chemical does not bleach the dye shade and has a very good light fastness. SYnthol SL 335 can be used as a single fatliquor (dry touch) or in combination. It emulsifies easily with all other fatliquors and has no affinity to the wool. TDS request Request a TDS of product TDS Sample request Request a sample of product Request