For years stain resistance and water repellency have been commonly achieved by the use of fluoropolymers. In recent years regulations have tightened for these types of polymers and their pre-cursors such as PFOA and PFOS as perceived to be biopersistant, carcinogenic and highly toxic. Zelan™ CA-72 is the newest, non-halogenated, water and stain repellent treatment from Chemours™. Zelan™ CA-72 offers all of the stain and water repellent properties of traditional fluorinated treatments but it is manufactured using renewably sourced, non-fluorinated, plant based material.
It is recommended to dilute Zelan™CA-72 to 5-15% working strength with water. A ladder study should be conducted to determine the optimum concentration for your specific application. A biocide
should be added to formulations containing Zelan™ CA-72 to prevent microbial contamination and growth. For particularly dense substrates the addition of 2-5 wt% polar protic solvent can improve performance.