Collacral LA 30 Solution of polyvinyl-pyrrolidone BASF Dispersing agents Rheology Modifier/ Thickener Architectural / Decorative Water Collacral® LA 30. Aqueous solution of polyvinyl-pyrrolidone (approx. 30%). Very effective protective colloid and stabilizer; prevents pigment floating and serum formation; for deep tone paints. Thickener. Controls the flow behaviour. Very effective protective colloid and stabilizer; prevents pigment floating and serum formation; for deep tone paints.