Waterproofing fatliquor for the highest requirements Synthol EW 321 is a watherproofing fatliquor for the highest requirements. Suitable applications include: bag leather and shoe upper. Water resistant Bags & leather goods Shoe Upper Synthol EW 321 is used when the highest standards in waterproofing have to be met. Leathers have medium softness with a full and rubbery handle. Softer articles can be made without negative effects by including amounts of Synthol DS 600 into the mixture. The grain remains very tight, even when higher amounts of the product are applied. The grain has a pleasant and smooth handle. TDS request Request a TDS of product TDS Sample request Request a sample of product Request Water resistant portfolio This product is part of our Water resistant portfolio. With our product portfolio of water resistant chemicals for retanning, wet end and finishing stages we offer a complete range to optimize your waterproof leather recipe. Download the brochure