Thickener Harris & Menuk Product Search Select Category Thickener Cotton: CO Polyester: PES Polyamide: PA Viscose: VI Spandex, Lycra: EL ZDHC MRSL Bluesign Oeko Tex GOTS Product Name Description Substrate Ionic Character Brooksol TKR 391 Aqueous polyurethane thickener All SubstratesNon-ionic Brooksol TKR 309 Aqueous polyurethane thickener All SubstratesNon-ionic