Yes, PolyDADMAC is an extremely water-soluble viscous liquid or white powder. 

PolyDADMAC (Polydiallyldimethylammonium chloride) is a water-soluble cationic polymer. Its solubility in water is due to the presence of polar functional groups and its overall ionic nature, which allows it to dissolve easily in aqueous solutions. This property makes PolyDADMAC highly effective for various applications where water solubility is crucial, such as in water treatment processes for coagulation, flocculation, and sludge dewatering.